diff --git a/modules/openapi-generator/src/main/resources/typescript-nestjs/api.service.mustache b/modules/openapi-generator/src/main/resources/typescript-nestjs/api.service.mustache
index 12bf8d23886..87f73c75d52 100644
--- a/modules/openapi-generator/src/main/resources/typescript-nestjs/api.service.mustache
+++ b/modules/openapi-generator/src/main/resources/typescript-nestjs/api.service.mustache
@@ -8,7 +8,7 @@ import { HttpService } from '@nestjs/axios';
 {{^useAxiosHttpModule}}
 import { HttpService, Injectable, Optional } from '@nestjs/common';
 {{/useAxiosHttpModule}}
-import { AxiosResponse } from 'axios';
+import type { AxiosRequestConfig, AxiosResponse } from 'axios';
 import { Observable, from, of, switchMap } from 'rxjs';
 {{#imports}}
 import { {{classname}} } from '../{{filename}}';
@@ -93,14 +93,15 @@ export class {{classname}} {
      {{/allParams}}* @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
      {{/useSingleRequestParameter}}
+     * @param {*} [{{nickname}}Opts.config] Override http request option.
      */
     {{#useSingleRequestParameter}}
-    public {{nickname}}({{#allParams.0}}requestParameters: {{classname}}{{operationIdCamelCase}}Request, {{/allParams.0}}): Observable<AxiosResponse<{{#returnType}}{{{returnType}}}{{#isResponseTypeFile}}|undefined{{/isResponseTypeFile}}{{/returnType}}{{^returnType}}any{{/returnType}}>>;
-    public {{nickname}}({{#allParams.0}}requestParameters: {{classname}}{{operationIdCamelCase}}Request, {{/allParams.0}}): Observable<any> {
+    public {{nickname}}({{#allParams.0}}requestParameters: {{classname}}{{operationIdCamelCase}}Request, {{/allParams.0}}{{nickname}}Opts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<{{#returnType}}{{{returnType}}}{{#isResponseTypeFile}}|undefined{{/isResponseTypeFile}}{{/returnType}}{{^returnType}}any{{/returnType}}>>;
+    public {{nickname}}({{#allParams.0}}requestParameters: {{classname}}{{operationIdCamelCase}}Request, {{/allParams.0}}{{nickname}}Opts?: { config?: AxiosRequestConfig }): Observable<any> {
     {{/useSingleRequestParameter}}
     {{^useSingleRequestParameter}}
-    public {{nickname}}({{#allParams}}{{^isConstEnumParam}}{{paramName}}{{^required}}?{{/required}}: {{{dataType}}}, {{/isConstEnumParam}}{{/allParams}}): Observable<AxiosResponse<{{#returnType}}{{{returnType}}}{{#isResponseTypeFile}}|undefined{{/isResponseTypeFile}}{{/returnType}}{{^returnType}}any{{/returnType}}>>;
-    public {{nickname}}({{#allParams}}{{^isConstEnumParam}}{{paramName}}{{^required}}?{{/required}}: {{{dataType}}}, {{/isConstEnumParam}}{{/allParams}}): Observable<any> {
+    public {{nickname}}({{#allParams}}{{^isConstEnumParam}}{{paramName}}{{^required}}?{{/required}}: {{{dataType}}}, {{/isConstEnumParam}}{{/allParams}}{{nickname}}Opts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<{{#returnType}}{{{returnType}}}{{#isResponseTypeFile}}|undefined{{/isResponseTypeFile}}{{/returnType}}{{^returnType}}any{{/returnType}}>>;
+    public {{nickname}}({{#allParams}}{{^isConstEnumParam}}{{paramName}}{{^required}}?{{/required}}: {{{dataType}}}, {{/isConstEnumParam}}{{/allParams}}{{nickname}}Opts?: { config?: AxiosRequestConfig }): Observable<any> {
     {{/useSingleRequestParameter}}
 {{#allParams.0}}
 {{#useSingleRequestParameter}}
@@ -291,7 +292,8 @@ export class {{classname}} {
                         responseType: "blob",
         {{/isResponseFile}}
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...{{nickname}}Opts?.config,
+                        headers: {...headers, ...{{nickname}}Opts?.config?.headers},
                     }
                 );
             })
diff --git a/samples/client/petstore/typescript-nestjs-v6-provided-in-root/builds/default/api/pet.service.ts b/samples/client/petstore/typescript-nestjs-v6-provided-in-root/builds/default/api/pet.service.ts
index 1f0ae5010da..81bbb54a9ca 100644
--- a/samples/client/petstore/typescript-nestjs-v6-provided-in-root/builds/default/api/pet.service.ts
+++ b/samples/client/petstore/typescript-nestjs-v6-provided-in-root/builds/default/api/pet.service.ts
@@ -12,7 +12,7 @@
 /* tslint:disable:no-unused-variable member-ordering */
 
 import { HttpService, Injectable, Optional } from '@nestjs/common';
-import { AxiosResponse } from 'axios';
+import type { AxiosRequestConfig, AxiosResponse } from 'axios';
 import { Observable, from, of, switchMap } from 'rxjs';
 import { ApiResponse } from '../model/apiResponse';
 import { Pet } from '../model/pet';
@@ -49,9 +49,10 @@ export class PetService {
      * @param pet Pet object that needs to be added to the store
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [addPetOpts.config] Override http request option.
      */
-    public addPet(pet: Pet, ): Observable<AxiosResponse<Pet>>;
-    public addPet(pet: Pet, ): Observable<any> {
+    public addPet(pet: Pet, addPetOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<Pet>>;
+    public addPet(pet: Pet, addPetOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (pet === null || pet === undefined) {
             throw new Error('Required parameter pet was null or undefined when calling addPet.');
         }
@@ -96,7 +97,8 @@ export class PetService {
                     pet,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...addPetOpts?.config,
+                        headers: {...headers, ...addPetOpts?.config?.headers},
                     }
                 );
             })
@@ -109,9 +111,10 @@ export class PetService {
      * @param apiKey 
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [deletePetOpts.config] Override http request option.
      */
-    public deletePet(petId: number, apiKey?: string, ): Observable<AxiosResponse<any>>;
-    public deletePet(petId: number, apiKey?: string, ): Observable<any> {
+    public deletePet(petId: number, apiKey?: string, deletePetOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<any>>;
+    public deletePet(petId: number, apiKey?: string, deletePetOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (petId === null || petId === undefined) {
             throw new Error('Required parameter petId was null or undefined when calling deletePet.');
         }
@@ -150,7 +153,8 @@ export class PetService {
                 return this.httpClient.delete<any>(`${this.basePath}/pet/${encodeURIComponent(String(petId))}`,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...deletePetOpts?.config,
+                        headers: {...headers, ...deletePetOpts?.config?.headers},
                     }
                 );
             })
@@ -162,9 +166,10 @@ export class PetService {
      * @param status Status values that need to be considered for filter
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [findPetsByStatusOpts.config] Override http request option.
      */
-    public findPetsByStatus(status: Array<'available' | 'pending' | 'sold'>, ): Observable<AxiosResponse<Array<Pet>>>;
-    public findPetsByStatus(status: Array<'available' | 'pending' | 'sold'>, ): Observable<any> {
+    public findPetsByStatus(status: Array<'available' | 'pending' | 'sold'>, findPetsByStatusOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<Array<Pet>>>;
+    public findPetsByStatus(status: Array<'available' | 'pending' | 'sold'>, findPetsByStatusOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (status === null || status === undefined) {
             throw new Error('Required parameter status was null or undefined when calling findPetsByStatus.');
         }
@@ -208,7 +213,8 @@ export class PetService {
                     {
                         params: queryParameters,
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...findPetsByStatusOpts?.config,
+                        headers: {...headers, ...findPetsByStatusOpts?.config?.headers},
                     }
                 );
             })
@@ -220,9 +226,10 @@ export class PetService {
      * @param tags Tags to filter by
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [findPetsByTagsOpts.config] Override http request option.
      */
-    public findPetsByTags(tags: Array<string>, ): Observable<AxiosResponse<Array<Pet>>>;
-    public findPetsByTags(tags: Array<string>, ): Observable<any> {
+    public findPetsByTags(tags: Array<string>, findPetsByTagsOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<Array<Pet>>>;
+    public findPetsByTags(tags: Array<string>, findPetsByTagsOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (tags === null || tags === undefined) {
             throw new Error('Required parameter tags was null or undefined when calling findPetsByTags.');
         }
@@ -266,7 +273,8 @@ export class PetService {
                     {
                         params: queryParameters,
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...findPetsByTagsOpts?.config,
+                        headers: {...headers, ...findPetsByTagsOpts?.config?.headers},
                     }
                 );
             })
@@ -278,9 +286,10 @@ export class PetService {
      * @param petId ID of pet to return
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [getPetByIdOpts.config] Override http request option.
      */
-    public getPetById(petId: number, ): Observable<AxiosResponse<Pet>>;
-    public getPetById(petId: number, ): Observable<any> {
+    public getPetById(petId: number, getPetByIdOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<Pet>>;
+    public getPetById(petId: number, getPetByIdOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (petId === null || petId === undefined) {
             throw new Error('Required parameter petId was null or undefined when calling getPetById.');
         }
@@ -316,7 +325,8 @@ export class PetService {
                 return this.httpClient.get<Pet>(`${this.basePath}/pet/${encodeURIComponent(String(petId))}`,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...getPetByIdOpts?.config,
+                        headers: {...headers, ...getPetByIdOpts?.config?.headers},
                     }
                 );
             })
@@ -328,9 +338,10 @@ export class PetService {
      * @param pet Pet object that needs to be added to the store
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [updatePetOpts.config] Override http request option.
      */
-    public updatePet(pet: Pet, ): Observable<AxiosResponse<Pet>>;
-    public updatePet(pet: Pet, ): Observable<any> {
+    public updatePet(pet: Pet, updatePetOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<Pet>>;
+    public updatePet(pet: Pet, updatePetOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (pet === null || pet === undefined) {
             throw new Error('Required parameter pet was null or undefined when calling updatePet.');
         }
@@ -375,7 +386,8 @@ export class PetService {
                     pet,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...updatePetOpts?.config,
+                        headers: {...headers, ...updatePetOpts?.config?.headers},
                     }
                 );
             })
@@ -389,9 +401,10 @@ export class PetService {
      * @param status Updated status of the pet
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [updatePetWithFormOpts.config] Override http request option.
      */
-    public updatePetWithForm(petId: number, name?: string, status?: string, ): Observable<AxiosResponse<any>>;
-    public updatePetWithForm(petId: number, name?: string, status?: string, ): Observable<any> {
+    public updatePetWithForm(petId: number, name?: string, status?: string, updatePetWithFormOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<any>>;
+    public updatePetWithForm(petId: number, name?: string, status?: string, updatePetWithFormOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (petId === null || petId === undefined) {
             throw new Error('Required parameter petId was null or undefined when calling updatePetWithForm.');
         }
@@ -449,7 +462,8 @@ export class PetService {
                     convertFormParamsToString ? formParams!.toString() : formParams!,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...updatePetWithFormOpts?.config,
+                        headers: {...headers, ...updatePetWithFormOpts?.config?.headers},
                     }
                 );
             })
@@ -463,9 +477,10 @@ export class PetService {
      * @param file file to upload
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [uploadFileOpts.config] Override http request option.
      */
-    public uploadFile(petId: number, additionalMetadata?: string, file?: Blob, ): Observable<AxiosResponse<ApiResponse>>;
-    public uploadFile(petId: number, additionalMetadata?: string, file?: Blob, ): Observable<any> {
+    public uploadFile(petId: number, additionalMetadata?: string, file?: Blob, uploadFileOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<ApiResponse>>;
+    public uploadFile(petId: number, additionalMetadata?: string, file?: Blob, uploadFileOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (petId === null || petId === undefined) {
             throw new Error('Required parameter petId was null or undefined when calling uploadFile.');
         }
@@ -528,7 +543,8 @@ export class PetService {
                     convertFormParamsToString ? formParams!.toString() : formParams!,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...uploadFileOpts?.config,
+                        headers: {...headers, ...uploadFileOpts?.config?.headers},
                     }
                 );
             })
diff --git a/samples/client/petstore/typescript-nestjs-v6-provided-in-root/builds/default/api/store.service.ts b/samples/client/petstore/typescript-nestjs-v6-provided-in-root/builds/default/api/store.service.ts
index 94297bee306..ddbcb72df5e 100644
--- a/samples/client/petstore/typescript-nestjs-v6-provided-in-root/builds/default/api/store.service.ts
+++ b/samples/client/petstore/typescript-nestjs-v6-provided-in-root/builds/default/api/store.service.ts
@@ -12,7 +12,7 @@
 /* tslint:disable:no-unused-variable member-ordering */
 
 import { HttpService, Injectable, Optional } from '@nestjs/common';
-import { AxiosResponse } from 'axios';
+import type { AxiosRequestConfig, AxiosResponse } from 'axios';
 import { Observable, from, of, switchMap } from 'rxjs';
 import { Order } from '../model/order';
 import { Configuration } from '../configuration';
@@ -48,9 +48,10 @@ export class StoreService {
      * @param orderId ID of the order that needs to be deleted
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [deleteOrderOpts.config] Override http request option.
      */
-    public deleteOrder(orderId: string, ): Observable<AxiosResponse<any>>;
-    public deleteOrder(orderId: string, ): Observable<any> {
+    public deleteOrder(orderId: string, deleteOrderOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<any>>;
+    public deleteOrder(orderId: string, deleteOrderOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (orderId === null || orderId === undefined) {
             throw new Error('Required parameter orderId was null or undefined when calling deleteOrder.');
         }
@@ -79,7 +80,8 @@ export class StoreService {
                 return this.httpClient.delete<any>(`${this.basePath}/store/order/${encodeURIComponent(String(orderId))}`,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...deleteOrderOpts?.config,
+                        headers: {...headers, ...deleteOrderOpts?.config?.headers},
                     }
                 );
             })
@@ -90,9 +92,10 @@ export class StoreService {
      * Returns a map of status codes to quantities
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [getInventoryOpts.config] Override http request option.
      */
-    public getInventory(): Observable<AxiosResponse<{ [key: string]: number; }>>;
-    public getInventory(): Observable<any> {
+    public getInventory(getInventoryOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<{ [key: string]: number; }>>;
+    public getInventory(getInventoryOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         let headers = {...this.defaultHeaders};
 
         let accessTokenObservable: Observable<any> = of(null);
@@ -123,7 +126,8 @@ export class StoreService {
                 return this.httpClient.get<{ [key: string]: number; }>(`${this.basePath}/store/inventory`,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...getInventoryOpts?.config,
+                        headers: {...headers, ...getInventoryOpts?.config?.headers},
                     }
                 );
             })
@@ -135,9 +139,10 @@ export class StoreService {
      * @param orderId ID of pet that needs to be fetched
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [getOrderByIdOpts.config] Override http request option.
      */
-    public getOrderById(orderId: number, ): Observable<AxiosResponse<Order>>;
-    public getOrderById(orderId: number, ): Observable<any> {
+    public getOrderById(orderId: number, getOrderByIdOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<Order>>;
+    public getOrderById(orderId: number, getOrderByIdOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (orderId === null || orderId === undefined) {
             throw new Error('Required parameter orderId was null or undefined when calling getOrderById.');
         }
@@ -168,7 +173,8 @@ export class StoreService {
                 return this.httpClient.get<Order>(`${this.basePath}/store/order/${encodeURIComponent(String(orderId))}`,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...getOrderByIdOpts?.config,
+                        headers: {...headers, ...getOrderByIdOpts?.config?.headers},
                     }
                 );
             })
@@ -180,9 +186,10 @@ export class StoreService {
      * @param order order placed for purchasing the pet
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [placeOrderOpts.config] Override http request option.
      */
-    public placeOrder(order: Order, ): Observable<AxiosResponse<Order>>;
-    public placeOrder(order: Order, ): Observable<any> {
+    public placeOrder(order: Order, placeOrderOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<Order>>;
+    public placeOrder(order: Order, placeOrderOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (order === null || order === undefined) {
             throw new Error('Required parameter order was null or undefined when calling placeOrder.');
         }
@@ -219,7 +226,8 @@ export class StoreService {
                     order,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...placeOrderOpts?.config,
+                        headers: {...headers, ...placeOrderOpts?.config?.headers},
                     }
                 );
             })
diff --git a/samples/client/petstore/typescript-nestjs-v6-provided-in-root/builds/default/api/user.service.ts b/samples/client/petstore/typescript-nestjs-v6-provided-in-root/builds/default/api/user.service.ts
index ab3450300f7..c968d4f07ce 100644
--- a/samples/client/petstore/typescript-nestjs-v6-provided-in-root/builds/default/api/user.service.ts
+++ b/samples/client/petstore/typescript-nestjs-v6-provided-in-root/builds/default/api/user.service.ts
@@ -12,7 +12,7 @@
 /* tslint:disable:no-unused-variable member-ordering */
 
 import { HttpService, Injectable, Optional } from '@nestjs/common';
-import { AxiosResponse } from 'axios';
+import type { AxiosRequestConfig, AxiosResponse } from 'axios';
 import { Observable, from, of, switchMap } from 'rxjs';
 import { User } from '../model/user';
 import { Configuration } from '../configuration';
@@ -48,9 +48,10 @@ export class UserService {
      * @param user Created user object
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [createUserOpts.config] Override http request option.
      */
-    public createUser(user: User, ): Observable<AxiosResponse<any>>;
-    public createUser(user: User, ): Observable<any> {
+    public createUser(user: User, createUserOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<any>>;
+    public createUser(user: User, createUserOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (user === null || user === undefined) {
             throw new Error('Required parameter user was null or undefined when calling createUser.');
         }
@@ -90,7 +91,8 @@ export class UserService {
                     user,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...createUserOpts?.config,
+                        headers: {...headers, ...createUserOpts?.config?.headers},
                     }
                 );
             })
@@ -102,9 +104,10 @@ export class UserService {
      * @param user List of user object
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [createUsersWithArrayInputOpts.config] Override http request option.
      */
-    public createUsersWithArrayInput(user: Array<User>, ): Observable<AxiosResponse<any>>;
-    public createUsersWithArrayInput(user: Array<User>, ): Observable<any> {
+    public createUsersWithArrayInput(user: Array<User>, createUsersWithArrayInputOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<any>>;
+    public createUsersWithArrayInput(user: Array<User>, createUsersWithArrayInputOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (user === null || user === undefined) {
             throw new Error('Required parameter user was null or undefined when calling createUsersWithArrayInput.');
         }
@@ -144,7 +147,8 @@ export class UserService {
                     user,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...createUsersWithArrayInputOpts?.config,
+                        headers: {...headers, ...createUsersWithArrayInputOpts?.config?.headers},
                     }
                 );
             })
@@ -156,9 +160,10 @@ export class UserService {
      * @param user List of user object
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [createUsersWithListInputOpts.config] Override http request option.
      */
-    public createUsersWithListInput(user: Array<User>, ): Observable<AxiosResponse<any>>;
-    public createUsersWithListInput(user: Array<User>, ): Observable<any> {
+    public createUsersWithListInput(user: Array<User>, createUsersWithListInputOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<any>>;
+    public createUsersWithListInput(user: Array<User>, createUsersWithListInputOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (user === null || user === undefined) {
             throw new Error('Required parameter user was null or undefined when calling createUsersWithListInput.');
         }
@@ -198,7 +203,8 @@ export class UserService {
                     user,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...createUsersWithListInputOpts?.config,
+                        headers: {...headers, ...createUsersWithListInputOpts?.config?.headers},
                     }
                 );
             })
@@ -210,9 +216,10 @@ export class UserService {
      * @param username The name that needs to be deleted
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [deleteUserOpts.config] Override http request option.
      */
-    public deleteUser(username: string, ): Observable<AxiosResponse<any>>;
-    public deleteUser(username: string, ): Observable<any> {
+    public deleteUser(username: string, deleteUserOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<any>>;
+    public deleteUser(username: string, deleteUserOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (username === null || username === undefined) {
             throw new Error('Required parameter username was null or undefined when calling deleteUser.');
         }
@@ -246,7 +253,8 @@ export class UserService {
                 return this.httpClient.delete<any>(`${this.basePath}/user/${encodeURIComponent(String(username))}`,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...deleteUserOpts?.config,
+                        headers: {...headers, ...deleteUserOpts?.config?.headers},
                     }
                 );
             })
@@ -258,9 +266,10 @@ export class UserService {
      * @param username The name that needs to be fetched. Use user1 for testing.
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [getUserByNameOpts.config] Override http request option.
      */
-    public getUserByName(username: string, ): Observable<AxiosResponse<User>>;
-    public getUserByName(username: string, ): Observable<any> {
+    public getUserByName(username: string, getUserByNameOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<User>>;
+    public getUserByName(username: string, getUserByNameOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (username === null || username === undefined) {
             throw new Error('Required parameter username was null or undefined when calling getUserByName.');
         }
@@ -291,7 +300,8 @@ export class UserService {
                 return this.httpClient.get<User>(`${this.basePath}/user/${encodeURIComponent(String(username))}`,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...getUserByNameOpts?.config,
+                        headers: {...headers, ...getUserByNameOpts?.config?.headers},
                     }
                 );
             })
@@ -304,9 +314,10 @@ export class UserService {
      * @param password The password for login in clear text
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [loginUserOpts.config] Override http request option.
      */
-    public loginUser(username: string, password: string, ): Observable<AxiosResponse<string>>;
-    public loginUser(username: string, password: string, ): Observable<any> {
+    public loginUser(username: string, password: string, loginUserOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<string>>;
+    public loginUser(username: string, password: string, loginUserOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (username === null || username === undefined) {
             throw new Error('Required parameter username was null or undefined when calling loginUser.');
         }
@@ -350,7 +361,8 @@ export class UserService {
                     {
                         params: queryParameters,
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...loginUserOpts?.config,
+                        headers: {...headers, ...loginUserOpts?.config?.headers},
                     }
                 );
             })
@@ -361,9 +373,10 @@ export class UserService {
      * 
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [logoutUserOpts.config] Override http request option.
      */
-    public logoutUser(): Observable<AxiosResponse<any>>;
-    public logoutUser(): Observable<any> {
+    public logoutUser(logoutUserOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<any>>;
+    public logoutUser(logoutUserOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         let headers = {...this.defaultHeaders};
 
         let accessTokenObservable: Observable<any> = of(null);
@@ -393,7 +406,8 @@ export class UserService {
                 return this.httpClient.get<any>(`${this.basePath}/user/logout`,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...logoutUserOpts?.config,
+                        headers: {...headers, ...logoutUserOpts?.config?.headers},
                     }
                 );
             })
@@ -406,9 +420,10 @@ export class UserService {
      * @param user Updated user object
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [updateUserOpts.config] Override http request option.
      */
-    public updateUser(username: string, user: User, ): Observable<AxiosResponse<any>>;
-    public updateUser(username: string, user: User, ): Observable<any> {
+    public updateUser(username: string, user: User, updateUserOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<any>>;
+    public updateUser(username: string, user: User, updateUserOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (username === null || username === undefined) {
             throw new Error('Required parameter username was null or undefined when calling updateUser.');
         }
@@ -452,7 +467,8 @@ export class UserService {
                     user,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...updateUserOpts?.config,
+                        headers: {...headers, ...updateUserOpts?.config?.headers},
                     }
                 );
             })
diff --git a/samples/client/petstore/typescript-nestjs-v8-provided-in-root/builds/default/api/pet.service.ts b/samples/client/petstore/typescript-nestjs-v8-provided-in-root/builds/default/api/pet.service.ts
index 5f68577397a..61cd6549aa0 100644
--- a/samples/client/petstore/typescript-nestjs-v8-provided-in-root/builds/default/api/pet.service.ts
+++ b/samples/client/petstore/typescript-nestjs-v8-provided-in-root/builds/default/api/pet.service.ts
@@ -13,7 +13,7 @@
 
 import { Injectable, Optional } from '@nestjs/common';
 import { HttpService } from '@nestjs/axios';
-import { AxiosResponse } from 'axios';
+import type { AxiosRequestConfig, AxiosResponse } from 'axios';
 import { Observable, from, of, switchMap } from 'rxjs';
 import { ApiResponse } from '../model/apiResponse';
 import { Pet } from '../model/pet';
@@ -50,9 +50,10 @@ export class PetService {
      * @param pet Pet object that needs to be added to the store
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [addPetOpts.config] Override http request option.
      */
-    public addPet(pet: Pet, ): Observable<AxiosResponse<Pet>>;
-    public addPet(pet: Pet, ): Observable<any> {
+    public addPet(pet: Pet, addPetOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<Pet>>;
+    public addPet(pet: Pet, addPetOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (pet === null || pet === undefined) {
             throw new Error('Required parameter pet was null or undefined when calling addPet.');
         }
@@ -97,7 +98,8 @@ export class PetService {
                     pet,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...addPetOpts?.config,
+                        headers: {...headers, ...addPetOpts?.config?.headers},
                     }
                 );
             })
@@ -110,9 +112,10 @@ export class PetService {
      * @param apiKey 
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [deletePetOpts.config] Override http request option.
      */
-    public deletePet(petId: number, apiKey?: string, ): Observable<AxiosResponse<any>>;
-    public deletePet(petId: number, apiKey?: string, ): Observable<any> {
+    public deletePet(petId: number, apiKey?: string, deletePetOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<any>>;
+    public deletePet(petId: number, apiKey?: string, deletePetOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (petId === null || petId === undefined) {
             throw new Error('Required parameter petId was null or undefined when calling deletePet.');
         }
@@ -151,7 +154,8 @@ export class PetService {
                 return this.httpClient.delete<any>(`${this.basePath}/pet/${encodeURIComponent(String(petId))}`,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...deletePetOpts?.config,
+                        headers: {...headers, ...deletePetOpts?.config?.headers},
                     }
                 );
             })
@@ -163,9 +167,10 @@ export class PetService {
      * @param status Status values that need to be considered for filter
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [findPetsByStatusOpts.config] Override http request option.
      */
-    public findPetsByStatus(status: Array<'available' | 'pending' | 'sold'>, ): Observable<AxiosResponse<Array<Pet>>>;
-    public findPetsByStatus(status: Array<'available' | 'pending' | 'sold'>, ): Observable<any> {
+    public findPetsByStatus(status: Array<'available' | 'pending' | 'sold'>, findPetsByStatusOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<Array<Pet>>>;
+    public findPetsByStatus(status: Array<'available' | 'pending' | 'sold'>, findPetsByStatusOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (status === null || status === undefined) {
             throw new Error('Required parameter status was null or undefined when calling findPetsByStatus.');
         }
@@ -209,7 +214,8 @@ export class PetService {
                     {
                         params: queryParameters,
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...findPetsByStatusOpts?.config,
+                        headers: {...headers, ...findPetsByStatusOpts?.config?.headers},
                     }
                 );
             })
@@ -221,9 +227,10 @@ export class PetService {
      * @param tags Tags to filter by
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [findPetsByTagsOpts.config] Override http request option.
      */
-    public findPetsByTags(tags: Array<string>, ): Observable<AxiosResponse<Array<Pet>>>;
-    public findPetsByTags(tags: Array<string>, ): Observable<any> {
+    public findPetsByTags(tags: Array<string>, findPetsByTagsOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<Array<Pet>>>;
+    public findPetsByTags(tags: Array<string>, findPetsByTagsOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (tags === null || tags === undefined) {
             throw new Error('Required parameter tags was null or undefined when calling findPetsByTags.');
         }
@@ -267,7 +274,8 @@ export class PetService {
                     {
                         params: queryParameters,
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...findPetsByTagsOpts?.config,
+                        headers: {...headers, ...findPetsByTagsOpts?.config?.headers},
                     }
                 );
             })
@@ -279,9 +287,10 @@ export class PetService {
      * @param petId ID of pet to return
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [getPetByIdOpts.config] Override http request option.
      */
-    public getPetById(petId: number, ): Observable<AxiosResponse<Pet>>;
-    public getPetById(petId: number, ): Observable<any> {
+    public getPetById(petId: number, getPetByIdOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<Pet>>;
+    public getPetById(petId: number, getPetByIdOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (petId === null || petId === undefined) {
             throw new Error('Required parameter petId was null or undefined when calling getPetById.');
         }
@@ -317,7 +326,8 @@ export class PetService {
                 return this.httpClient.get<Pet>(`${this.basePath}/pet/${encodeURIComponent(String(petId))}`,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...getPetByIdOpts?.config,
+                        headers: {...headers, ...getPetByIdOpts?.config?.headers},
                     }
                 );
             })
@@ -329,9 +339,10 @@ export class PetService {
      * @param pet Pet object that needs to be added to the store
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [updatePetOpts.config] Override http request option.
      */
-    public updatePet(pet: Pet, ): Observable<AxiosResponse<Pet>>;
-    public updatePet(pet: Pet, ): Observable<any> {
+    public updatePet(pet: Pet, updatePetOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<Pet>>;
+    public updatePet(pet: Pet, updatePetOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (pet === null || pet === undefined) {
             throw new Error('Required parameter pet was null or undefined when calling updatePet.');
         }
@@ -376,7 +387,8 @@ export class PetService {
                     pet,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...updatePetOpts?.config,
+                        headers: {...headers, ...updatePetOpts?.config?.headers},
                     }
                 );
             })
@@ -390,9 +402,10 @@ export class PetService {
      * @param status Updated status of the pet
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [updatePetWithFormOpts.config] Override http request option.
      */
-    public updatePetWithForm(petId: number, name?: string, status?: string, ): Observable<AxiosResponse<any>>;
-    public updatePetWithForm(petId: number, name?: string, status?: string, ): Observable<any> {
+    public updatePetWithForm(petId: number, name?: string, status?: string, updatePetWithFormOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<any>>;
+    public updatePetWithForm(petId: number, name?: string, status?: string, updatePetWithFormOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (petId === null || petId === undefined) {
             throw new Error('Required parameter petId was null or undefined when calling updatePetWithForm.');
         }
@@ -450,7 +463,8 @@ export class PetService {
                     convertFormParamsToString ? formParams!.toString() : formParams!,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...updatePetWithFormOpts?.config,
+                        headers: {...headers, ...updatePetWithFormOpts?.config?.headers},
                     }
                 );
             })
@@ -464,9 +478,10 @@ export class PetService {
      * @param file file to upload
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [uploadFileOpts.config] Override http request option.
      */
-    public uploadFile(petId: number, additionalMetadata?: string, file?: Blob, ): Observable<AxiosResponse<ApiResponse>>;
-    public uploadFile(petId: number, additionalMetadata?: string, file?: Blob, ): Observable<any> {
+    public uploadFile(petId: number, additionalMetadata?: string, file?: Blob, uploadFileOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<ApiResponse>>;
+    public uploadFile(petId: number, additionalMetadata?: string, file?: Blob, uploadFileOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (petId === null || petId === undefined) {
             throw new Error('Required parameter petId was null or undefined when calling uploadFile.');
         }
@@ -529,7 +544,8 @@ export class PetService {
                     convertFormParamsToString ? formParams!.toString() : formParams!,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...uploadFileOpts?.config,
+                        headers: {...headers, ...uploadFileOpts?.config?.headers},
                     }
                 );
             })
diff --git a/samples/client/petstore/typescript-nestjs-v8-provided-in-root/builds/default/api/store.service.ts b/samples/client/petstore/typescript-nestjs-v8-provided-in-root/builds/default/api/store.service.ts
index 72e0006fcb7..b3a704627f3 100644
--- a/samples/client/petstore/typescript-nestjs-v8-provided-in-root/builds/default/api/store.service.ts
+++ b/samples/client/petstore/typescript-nestjs-v8-provided-in-root/builds/default/api/store.service.ts
@@ -13,7 +13,7 @@
 
 import { Injectable, Optional } from '@nestjs/common';
 import { HttpService } from '@nestjs/axios';
-import { AxiosResponse } from 'axios';
+import type { AxiosRequestConfig, AxiosResponse } from 'axios';
 import { Observable, from, of, switchMap } from 'rxjs';
 import { Order } from '../model/order';
 import { Configuration } from '../configuration';
@@ -49,9 +49,10 @@ export class StoreService {
      * @param orderId ID of the order that needs to be deleted
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [deleteOrderOpts.config] Override http request option.
      */
-    public deleteOrder(orderId: string, ): Observable<AxiosResponse<any>>;
-    public deleteOrder(orderId: string, ): Observable<any> {
+    public deleteOrder(orderId: string, deleteOrderOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<any>>;
+    public deleteOrder(orderId: string, deleteOrderOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (orderId === null || orderId === undefined) {
             throw new Error('Required parameter orderId was null or undefined when calling deleteOrder.');
         }
@@ -80,7 +81,8 @@ export class StoreService {
                 return this.httpClient.delete<any>(`${this.basePath}/store/order/${encodeURIComponent(String(orderId))}`,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...deleteOrderOpts?.config,
+                        headers: {...headers, ...deleteOrderOpts?.config?.headers},
                     }
                 );
             })
@@ -91,9 +93,10 @@ export class StoreService {
      * Returns a map of status codes to quantities
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [getInventoryOpts.config] Override http request option.
      */
-    public getInventory(): Observable<AxiosResponse<{ [key: string]: number; }>>;
-    public getInventory(): Observable<any> {
+    public getInventory(getInventoryOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<{ [key: string]: number; }>>;
+    public getInventory(getInventoryOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         let headers = {...this.defaultHeaders};
 
         let accessTokenObservable: Observable<any> = of(null);
@@ -124,7 +127,8 @@ export class StoreService {
                 return this.httpClient.get<{ [key: string]: number; }>(`${this.basePath}/store/inventory`,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...getInventoryOpts?.config,
+                        headers: {...headers, ...getInventoryOpts?.config?.headers},
                     }
                 );
             })
@@ -136,9 +140,10 @@ export class StoreService {
      * @param orderId ID of pet that needs to be fetched
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [getOrderByIdOpts.config] Override http request option.
      */
-    public getOrderById(orderId: number, ): Observable<AxiosResponse<Order>>;
-    public getOrderById(orderId: number, ): Observable<any> {
+    public getOrderById(orderId: number, getOrderByIdOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<Order>>;
+    public getOrderById(orderId: number, getOrderByIdOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (orderId === null || orderId === undefined) {
             throw new Error('Required parameter orderId was null or undefined when calling getOrderById.');
         }
@@ -169,7 +174,8 @@ export class StoreService {
                 return this.httpClient.get<Order>(`${this.basePath}/store/order/${encodeURIComponent(String(orderId))}`,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...getOrderByIdOpts?.config,
+                        headers: {...headers, ...getOrderByIdOpts?.config?.headers},
                     }
                 );
             })
@@ -181,9 +187,10 @@ export class StoreService {
      * @param order order placed for purchasing the pet
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [placeOrderOpts.config] Override http request option.
      */
-    public placeOrder(order: Order, ): Observable<AxiosResponse<Order>>;
-    public placeOrder(order: Order, ): Observable<any> {
+    public placeOrder(order: Order, placeOrderOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<Order>>;
+    public placeOrder(order: Order, placeOrderOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (order === null || order === undefined) {
             throw new Error('Required parameter order was null or undefined when calling placeOrder.');
         }
@@ -220,7 +227,8 @@ export class StoreService {
                     order,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...placeOrderOpts?.config,
+                        headers: {...headers, ...placeOrderOpts?.config?.headers},
                     }
                 );
             })
diff --git a/samples/client/petstore/typescript-nestjs-v8-provided-in-root/builds/default/api/user.service.ts b/samples/client/petstore/typescript-nestjs-v8-provided-in-root/builds/default/api/user.service.ts
index d55838c23a1..4332b9d3dc4 100644
--- a/samples/client/petstore/typescript-nestjs-v8-provided-in-root/builds/default/api/user.service.ts
+++ b/samples/client/petstore/typescript-nestjs-v8-provided-in-root/builds/default/api/user.service.ts
@@ -13,7 +13,7 @@
 
 import { Injectable, Optional } from '@nestjs/common';
 import { HttpService } from '@nestjs/axios';
-import { AxiosResponse } from 'axios';
+import type { AxiosRequestConfig, AxiosResponse } from 'axios';
 import { Observable, from, of, switchMap } from 'rxjs';
 import { User } from '../model/user';
 import { Configuration } from '../configuration';
@@ -49,9 +49,10 @@ export class UserService {
      * @param user Created user object
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [createUserOpts.config] Override http request option.
      */
-    public createUser(user: User, ): Observable<AxiosResponse<any>>;
-    public createUser(user: User, ): Observable<any> {
+    public createUser(user: User, createUserOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<any>>;
+    public createUser(user: User, createUserOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (user === null || user === undefined) {
             throw new Error('Required parameter user was null or undefined when calling createUser.');
         }
@@ -91,7 +92,8 @@ export class UserService {
                     user,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...createUserOpts?.config,
+                        headers: {...headers, ...createUserOpts?.config?.headers},
                     }
                 );
             })
@@ -103,9 +105,10 @@ export class UserService {
      * @param user List of user object
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [createUsersWithArrayInputOpts.config] Override http request option.
      */
-    public createUsersWithArrayInput(user: Array<User>, ): Observable<AxiosResponse<any>>;
-    public createUsersWithArrayInput(user: Array<User>, ): Observable<any> {
+    public createUsersWithArrayInput(user: Array<User>, createUsersWithArrayInputOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<any>>;
+    public createUsersWithArrayInput(user: Array<User>, createUsersWithArrayInputOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (user === null || user === undefined) {
             throw new Error('Required parameter user was null or undefined when calling createUsersWithArrayInput.');
         }
@@ -145,7 +148,8 @@ export class UserService {
                     user,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...createUsersWithArrayInputOpts?.config,
+                        headers: {...headers, ...createUsersWithArrayInputOpts?.config?.headers},
                     }
                 );
             })
@@ -157,9 +161,10 @@ export class UserService {
      * @param user List of user object
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [createUsersWithListInputOpts.config] Override http request option.
      */
-    public createUsersWithListInput(user: Array<User>, ): Observable<AxiosResponse<any>>;
-    public createUsersWithListInput(user: Array<User>, ): Observable<any> {
+    public createUsersWithListInput(user: Array<User>, createUsersWithListInputOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<any>>;
+    public createUsersWithListInput(user: Array<User>, createUsersWithListInputOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (user === null || user === undefined) {
             throw new Error('Required parameter user was null or undefined when calling createUsersWithListInput.');
         }
@@ -199,7 +204,8 @@ export class UserService {
                     user,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...createUsersWithListInputOpts?.config,
+                        headers: {...headers, ...createUsersWithListInputOpts?.config?.headers},
                     }
                 );
             })
@@ -211,9 +217,10 @@ export class UserService {
      * @param username The name that needs to be deleted
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [deleteUserOpts.config] Override http request option.
      */
-    public deleteUser(username: string, ): Observable<AxiosResponse<any>>;
-    public deleteUser(username: string, ): Observable<any> {
+    public deleteUser(username: string, deleteUserOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<any>>;
+    public deleteUser(username: string, deleteUserOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (username === null || username === undefined) {
             throw new Error('Required parameter username was null or undefined when calling deleteUser.');
         }
@@ -247,7 +254,8 @@ export class UserService {
                 return this.httpClient.delete<any>(`${this.basePath}/user/${encodeURIComponent(String(username))}`,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...deleteUserOpts?.config,
+                        headers: {...headers, ...deleteUserOpts?.config?.headers},
                     }
                 );
             })
@@ -259,9 +267,10 @@ export class UserService {
      * @param username The name that needs to be fetched. Use user1 for testing.
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [getUserByNameOpts.config] Override http request option.
      */
-    public getUserByName(username: string, ): Observable<AxiosResponse<User>>;
-    public getUserByName(username: string, ): Observable<any> {
+    public getUserByName(username: string, getUserByNameOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<User>>;
+    public getUserByName(username: string, getUserByNameOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (username === null || username === undefined) {
             throw new Error('Required parameter username was null or undefined when calling getUserByName.');
         }
@@ -292,7 +301,8 @@ export class UserService {
                 return this.httpClient.get<User>(`${this.basePath}/user/${encodeURIComponent(String(username))}`,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...getUserByNameOpts?.config,
+                        headers: {...headers, ...getUserByNameOpts?.config?.headers},
                     }
                 );
             })
@@ -305,9 +315,10 @@ export class UserService {
      * @param password The password for login in clear text
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [loginUserOpts.config] Override http request option.
      */
-    public loginUser(username: string, password: string, ): Observable<AxiosResponse<string>>;
-    public loginUser(username: string, password: string, ): Observable<any> {
+    public loginUser(username: string, password: string, loginUserOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<string>>;
+    public loginUser(username: string, password: string, loginUserOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (username === null || username === undefined) {
             throw new Error('Required parameter username was null or undefined when calling loginUser.');
         }
@@ -351,7 +362,8 @@ export class UserService {
                     {
                         params: queryParameters,
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...loginUserOpts?.config,
+                        headers: {...headers, ...loginUserOpts?.config?.headers},
                     }
                 );
             })
@@ -362,9 +374,10 @@ export class UserService {
      * 
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [logoutUserOpts.config] Override http request option.
      */
-    public logoutUser(): Observable<AxiosResponse<any>>;
-    public logoutUser(): Observable<any> {
+    public logoutUser(logoutUserOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<any>>;
+    public logoutUser(logoutUserOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         let headers = {...this.defaultHeaders};
 
         let accessTokenObservable: Observable<any> = of(null);
@@ -394,7 +407,8 @@ export class UserService {
                 return this.httpClient.get<any>(`${this.basePath}/user/logout`,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...logoutUserOpts?.config,
+                        headers: {...headers, ...logoutUserOpts?.config?.headers},
                     }
                 );
             })
@@ -407,9 +421,10 @@ export class UserService {
      * @param user Updated user object
      * @param observe set whether or not to return the data Observable as the body, response or events. defaults to returning the body.
      * @param reportProgress flag to report request and response progress.
+     * @param {*} [updateUserOpts.config] Override http request option.
      */
-    public updateUser(username: string, user: User, ): Observable<AxiosResponse<any>>;
-    public updateUser(username: string, user: User, ): Observable<any> {
+    public updateUser(username: string, user: User, updateUserOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<any>>;
+    public updateUser(username: string, user: User, updateUserOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         if (username === null || username === undefined) {
             throw new Error('Required parameter username was null or undefined when calling updateUser.');
         }
@@ -453,7 +468,8 @@ export class UserService {
                     user,
                     {
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...updateUserOpts?.config,
+                        headers: {...headers, ...updateUserOpts?.config?.headers},
                     }
                 );
             })
diff --git a/samples/client/petstore/typescript-nestjs/builds/reservedParamNames/api/default.service.ts b/samples/client/petstore/typescript-nestjs/builds/reservedParamNames/api/default.service.ts
index c41aa37ec06..4741970ee3f 100644
--- a/samples/client/petstore/typescript-nestjs/builds/reservedParamNames/api/default.service.ts
+++ b/samples/client/petstore/typescript-nestjs/builds/reservedParamNames/api/default.service.ts
@@ -13,7 +13,7 @@
 
 import { Injectable, Optional } from '@nestjs/common';
 import { HttpService } from '@nestjs/axios';
-import { AxiosResponse } from 'axios';
+import type { AxiosRequestConfig, AxiosResponse } from 'axios';
 import { Observable, from, of, switchMap } from 'rxjs';
 import { Configuration } from '../configuration';
 import { COLLECTION_FORMATS } from '../variables';
@@ -74,9 +74,10 @@ export class DefaultService {
      * Test reserved param names
      * 
      * @param {DefaultServiceTestReservedParamNamesRequest} requestParameters Request parameters.
+     * @param {*} [testReservedParamNamesOpts.config] Override http request option.
      */
-    public testReservedParamNames(requestParameters: DefaultServiceTestReservedParamNamesRequest, ): Observable<AxiosResponse<any>>;
-    public testReservedParamNames(requestParameters: DefaultServiceTestReservedParamNamesRequest, ): Observable<any> {
+    public testReservedParamNames(requestParameters: DefaultServiceTestReservedParamNamesRequest, testReservedParamNamesOpts?: { config?: AxiosRequestConfig }): Observable<AxiosResponse<any>>;
+    public testReservedParamNames(requestParameters: DefaultServiceTestReservedParamNamesRequest, testReservedParamNamesOpts?: { config?: AxiosRequestConfig }): Observable<any> {
         const {
             notReserved,
             'from': _from,
@@ -138,7 +139,8 @@ export class DefaultService {
                     {
                         params: queryParameters,
                         withCredentials: this.configuration.withCredentials,
-                        headers: headers
+                        ...testReservedParamNamesOpts?.config,
+                        headers: {...headers, ...testReservedParamNamesOpts?.config?.headers},
                     }
                 );
             })