diff --git a/modules/openapi-generator/src/main/resources/typescript/http/http.mustache b/modules/openapi-generator/src/main/resources/typescript/http/http.mustache
index b7ec2295711..0ecca57cd86 100644
--- a/modules/openapi-generator/src/main/resources/typescript/http/http.mustache
+++ b/modules/openapi-generator/src/main/resources/typescript/http/http.mustache
@@ -63,6 +63,20 @@ export class HttpException extends Error {
  */
 export type RequestBody = undefined | string | FormData | URLSearchParams;
 
+function ensureAbsoluteUrl(url: string) {
+    if (url.startsWith("http://") || url.startsWith("https://")) {
+        return url;
+    }
+    {{#platforms}}
+    {{#node}}
+    throw new Error("You need to define an absolute base url for the server.");
+    {{/node}}
+    {{^node}}
+    return window.location.origin + url;
+    {{/node}}
+    {{/platforms}}
+}
+
 /**
  * Represents an HTTP request context
  */
@@ -83,7 +97,7 @@ export class RequestContext {
      * @param httpMethod http method
      */
     public constructor(url: string, private httpMethod: HttpMethod) {
-        this.url = new URL(url);
+        this.url = new URL(ensureAbsoluteUrl(url));
     }
 
     /*
@@ -101,7 +115,7 @@ export class RequestContext {
      *
      */
     public setUrl(url: string) {
-        this.url = new URL(url);
+        this.url = new URL(ensureAbsoluteUrl(url));
     }
 
     /**
diff --git a/samples/client/others/typescript/builds/with-unique-items/http/http.ts b/samples/client/others/typescript/builds/with-unique-items/http/http.ts
index 5ec4785ede3..e8da8b355da 100644
--- a/samples/client/others/typescript/builds/with-unique-items/http/http.ts
+++ b/samples/client/others/typescript/builds/with-unique-items/http/http.ts
@@ -33,6 +33,13 @@ export class HttpException extends Error {
  */
 export type RequestBody = undefined | string | FormData | URLSearchParams;
 
+function ensureAbsoluteUrl(url: string) {
+    if (url.startsWith("http://") || url.startsWith("https://")) {
+        return url;
+    }
+    return window.location.origin + url;
+}
+
 /**
  * Represents an HTTP request context
  */
@@ -48,7 +55,7 @@ export class RequestContext {
      * @param httpMethod http method
      */
     public constructor(url: string, private httpMethod: HttpMethod) {
-        this.url = new URL(url);
+        this.url = new URL(ensureAbsoluteUrl(url));
     }
 
     /*
@@ -66,7 +73,7 @@ export class RequestContext {
      *
      */
     public setUrl(url: string) {
-        this.url = new URL(url);
+        this.url = new URL(ensureAbsoluteUrl(url));
     }
 
     /**
diff --git a/samples/openapi3/client/petstore/typescript/builds/browser/http/http.ts b/samples/openapi3/client/petstore/typescript/builds/browser/http/http.ts
index 5ec4785ede3..e8da8b355da 100644
--- a/samples/openapi3/client/petstore/typescript/builds/browser/http/http.ts
+++ b/samples/openapi3/client/petstore/typescript/builds/browser/http/http.ts
@@ -33,6 +33,13 @@ export class HttpException extends Error {
  */
 export type RequestBody = undefined | string | FormData | URLSearchParams;
 
+function ensureAbsoluteUrl(url: string) {
+    if (url.startsWith("http://") || url.startsWith("https://")) {
+        return url;
+    }
+    return window.location.origin + url;
+}
+
 /**
  * Represents an HTTP request context
  */
@@ -48,7 +55,7 @@ export class RequestContext {
      * @param httpMethod http method
      */
     public constructor(url: string, private httpMethod: HttpMethod) {
-        this.url = new URL(url);
+        this.url = new URL(ensureAbsoluteUrl(url));
     }
 
     /*
@@ -66,7 +73,7 @@ export class RequestContext {
      *
      */
     public setUrl(url: string) {
-        this.url = new URL(url);
+        this.url = new URL(ensureAbsoluteUrl(url));
     }
 
     /**
diff --git a/samples/openapi3/client/petstore/typescript/builds/composed-schemas/http/http.ts b/samples/openapi3/client/petstore/typescript/builds/composed-schemas/http/http.ts
index 5ec4785ede3..e8da8b355da 100644
--- a/samples/openapi3/client/petstore/typescript/builds/composed-schemas/http/http.ts
+++ b/samples/openapi3/client/petstore/typescript/builds/composed-schemas/http/http.ts
@@ -33,6 +33,13 @@ export class HttpException extends Error {
  */
 export type RequestBody = undefined | string | FormData | URLSearchParams;
 
+function ensureAbsoluteUrl(url: string) {
+    if (url.startsWith("http://") || url.startsWith("https://")) {
+        return url;
+    }
+    return window.location.origin + url;
+}
+
 /**
  * Represents an HTTP request context
  */
@@ -48,7 +55,7 @@ export class RequestContext {
      * @param httpMethod http method
      */
     public constructor(url: string, private httpMethod: HttpMethod) {
-        this.url = new URL(url);
+        this.url = new URL(ensureAbsoluteUrl(url));
     }
 
     /*
@@ -66,7 +73,7 @@ export class RequestContext {
      *
      */
     public setUrl(url: string) {
-        this.url = new URL(url);
+        this.url = new URL(ensureAbsoluteUrl(url));
     }
 
     /**
diff --git a/samples/openapi3/client/petstore/typescript/builds/default/http/http.ts b/samples/openapi3/client/petstore/typescript/builds/default/http/http.ts
index 50cca24fe84..af0075aeba6 100644
--- a/samples/openapi3/client/petstore/typescript/builds/default/http/http.ts
+++ b/samples/openapi3/client/petstore/typescript/builds/default/http/http.ts
@@ -41,6 +41,13 @@ export class HttpException extends Error {
  */
 export type RequestBody = undefined | string | FormData | URLSearchParams;
 
+function ensureAbsoluteUrl(url: string) {
+    if (url.startsWith("http://") || url.startsWith("https://")) {
+        return url;
+    }
+    throw new Error("You need to define an absolute base url for the server.");
+}
+
 /**
  * Represents an HTTP request context
  */
@@ -57,7 +64,7 @@ export class RequestContext {
      * @param httpMethod http method
      */
     public constructor(url: string, private httpMethod: HttpMethod) {
-        this.url = new URL(url);
+        this.url = new URL(ensureAbsoluteUrl(url));
     }
 
     /*
@@ -75,7 +82,7 @@ export class RequestContext {
      *
      */
     public setUrl(url: string) {
-        this.url = new URL(url);
+        this.url = new URL(ensureAbsoluteUrl(url));
     }
 
     /**
diff --git a/samples/openapi3/client/petstore/typescript/builds/deno/http/http.ts b/samples/openapi3/client/petstore/typescript/builds/deno/http/http.ts
index a286eac8a41..97a04c3e207 100644
--- a/samples/openapi3/client/petstore/typescript/builds/deno/http/http.ts
+++ b/samples/openapi3/client/petstore/typescript/builds/deno/http/http.ts
@@ -32,6 +32,13 @@ export class HttpException extends Error {
  */
 export type RequestBody = undefined | string | FormData | URLSearchParams;
 
+function ensureAbsoluteUrl(url: string) {
+    if (url.startsWith("http://") || url.startsWith("https://")) {
+        return url;
+    }
+    return window.location.origin + url;
+}
+
 /**
  * Represents an HTTP request context
  */
@@ -47,7 +54,7 @@ export class RequestContext {
      * @param httpMethod http method
      */
     public constructor(url: string, private httpMethod: HttpMethod) {
-        this.url = new URL(url);
+        this.url = new URL(ensureAbsoluteUrl(url));
     }
 
     /*
@@ -65,7 +72,7 @@ export class RequestContext {
      *
      */
     public setUrl(url: string) {
-        this.url = new URL(url);
+        this.url = new URL(ensureAbsoluteUrl(url));
     }
 
     /**
diff --git a/samples/openapi3/client/petstore/typescript/builds/inversify/http/http.ts b/samples/openapi3/client/petstore/typescript/builds/inversify/http/http.ts
index 50cca24fe84..af0075aeba6 100644
--- a/samples/openapi3/client/petstore/typescript/builds/inversify/http/http.ts
+++ b/samples/openapi3/client/petstore/typescript/builds/inversify/http/http.ts
@@ -41,6 +41,13 @@ export class HttpException extends Error {
  */
 export type RequestBody = undefined | string | FormData | URLSearchParams;
 
+function ensureAbsoluteUrl(url: string) {
+    if (url.startsWith("http://") || url.startsWith("https://")) {
+        return url;
+    }
+    throw new Error("You need to define an absolute base url for the server.");
+}
+
 /**
  * Represents an HTTP request context
  */
@@ -57,7 +64,7 @@ export class RequestContext {
      * @param httpMethod http method
      */
     public constructor(url: string, private httpMethod: HttpMethod) {
-        this.url = new URL(url);
+        this.url = new URL(ensureAbsoluteUrl(url));
     }
 
     /*
@@ -75,7 +82,7 @@ export class RequestContext {
      *
      */
     public setUrl(url: string) {
-        this.url = new URL(url);
+        this.url = new URL(ensureAbsoluteUrl(url));
     }
 
     /**
diff --git a/samples/openapi3/client/petstore/typescript/builds/jquery/http/http.ts b/samples/openapi3/client/petstore/typescript/builds/jquery/http/http.ts
index 4593d0f450c..81f327aa1ee 100644
--- a/samples/openapi3/client/petstore/typescript/builds/jquery/http/http.ts
+++ b/samples/openapi3/client/petstore/typescript/builds/jquery/http/http.ts
@@ -33,6 +33,13 @@ export class HttpException extends Error {
  */
 export type RequestBody = undefined | string | FormData | URLSearchParams;
 
+function ensureAbsoluteUrl(url: string) {
+    if (url.startsWith("http://") || url.startsWith("https://")) {
+        return url;
+    }
+    return window.location.origin + url;
+}
+
 /**
  * Represents an HTTP request context
  */
@@ -48,7 +55,7 @@ export class RequestContext {
      * @param httpMethod http method
      */
     public constructor(url: string, private httpMethod: HttpMethod) {
-        this.url = new URL(url);
+        this.url = new URL(ensureAbsoluteUrl(url));
     }
 
     /*
@@ -66,7 +73,7 @@ export class RequestContext {
      *
      */
     public setUrl(url: string) {
-        this.url = new URL(url);
+        this.url = new URL(ensureAbsoluteUrl(url));
     }
 
     /**
diff --git a/samples/openapi3/client/petstore/typescript/builds/object_params/http/http.ts b/samples/openapi3/client/petstore/typescript/builds/object_params/http/http.ts
index 50cca24fe84..af0075aeba6 100644
--- a/samples/openapi3/client/petstore/typescript/builds/object_params/http/http.ts
+++ b/samples/openapi3/client/petstore/typescript/builds/object_params/http/http.ts
@@ -41,6 +41,13 @@ export class HttpException extends Error {
  */
 export type RequestBody = undefined | string | FormData | URLSearchParams;
 
+function ensureAbsoluteUrl(url: string) {
+    if (url.startsWith("http://") || url.startsWith("https://")) {
+        return url;
+    }
+    throw new Error("You need to define an absolute base url for the server.");
+}
+
 /**
  * Represents an HTTP request context
  */
@@ -57,7 +64,7 @@ export class RequestContext {
      * @param httpMethod http method
      */
     public constructor(url: string, private httpMethod: HttpMethod) {
-        this.url = new URL(url);
+        this.url = new URL(ensureAbsoluteUrl(url));
     }
 
     /*
@@ -75,7 +82,7 @@ export class RequestContext {
      *
      */
     public setUrl(url: string) {
-        this.url = new URL(url);
+        this.url = new URL(ensureAbsoluteUrl(url));
     }
 
     /**
diff --git a/samples/openapi3/client/petstore/typescript/tests/browser/test/ServerConfiguration.test.ts b/samples/openapi3/client/petstore/typescript/tests/browser/test/ServerConfiguration.test.ts
new file mode 100644
index 00000000000..28b817fe296
--- /dev/null
+++ b/samples/openapi3/client/petstore/typescript/tests/browser/test/ServerConfiguration.test.ts
@@ -0,0 +1,19 @@
+import { expect } from '@esm-bundle/chai';
+import { ServerConfiguration, HttpMethod } from 'ts-petstore-client'
+
+describe("ServerConfiguration", () => {
+    it("supports absolute http URLs", async () => {
+        const config = new ServerConfiguration("http://localhost/v2", {});
+        expect(config.makeRequestContext("/resource", HttpMethod.PUT).getUrl()).to.equal("http://localhost/v2/resource");
+    })
+
+    it("supports absolute https URLs", async () => {
+        const config = new ServerConfiguration("https://localhost/v2", {});
+        expect(config.makeRequestContext("/resource", HttpMethod.PUT).getUrl()).to.equal("https://localhost/v2/resource");
+    })
+
+    it("supports relative URLs", async () => {
+        const config = new ServerConfiguration("/api", {});
+        expect(config.makeRequestContext("/resource", HttpMethod.PUT).getUrl()).to.equal("http://localhost:8080/api/resource");
+    })
+})
diff --git a/samples/openapi3/client/petstore/typescript/tests/browser/web-test-runner.config.js b/samples/openapi3/client/petstore/typescript/tests/browser/web-test-runner.config.js
index db096833265..0b3466fb9d9 100644
--- a/samples/openapi3/client/petstore/typescript/tests/browser/web-test-runner.config.js
+++ b/samples/openapi3/client/petstore/typescript/tests/browser/web-test-runner.config.js
@@ -4,6 +4,7 @@ export default {
   files: "./dist/*.test.js",
   nodeResolve: true,
   manual: false,
+  port: 8080,
   browsers: [
     puppeteerLauncher(),
   ],
diff --git a/samples/openapi3/client/petstore/typescript/tests/inversify/test/services.test.ts b/samples/openapi3/client/petstore/typescript/tests/inversify/test/services.test.ts
index 264dbad31af..f1bb264554b 100644
--- a/samples/openapi3/client/petstore/typescript/tests/inversify/test/services.test.ts
+++ b/samples/openapi3/client/petstore/typescript/tests/inversify/test/services.test.ts
@@ -2,7 +2,7 @@ import "reflect-metadata";
 import { Container } from "inversify";
 
 import * as petstore from "ts-petstore-client";
-import * as petstoreInternals from "ts-petstore-client/dist/apis/PetApi";
+import * as petstoreInternals from "../../../builds/inversify/dist/apis/PetApi";
 
 import { expect, assert } from "chai";
 import * as fs from "fs";
@@ -20,7 +20,7 @@ describe("ApiServiceBinder", () => {
     });
 
     it("binds server config", async () => {
-        const url = "foobar";
+        const url = "http://foobar";
         let callCount = 0;
         const mockServer = {
             makeRequestContext(endpoint: string, httpMethod: petstore.HttpMethod): petstore.RequestContext {
@@ -45,7 +45,7 @@ describe("ApiServiceBinder", () => {
     });
 
     it("binds server config to url", async () => {
-        const url = "foobar";
+        const url = "http://foobar";
         const petId = 42;
         apiServiceBinder.bindServerConfigurationToURL(url);