diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/retrofit2/api.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/retrofit2/api.mustache
index dd521a5fc87..0e8b8f22284 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/retrofit2/api.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/retrofit2/api.mustache
@@ -74,7 +74,7 @@ public interface {{classname}} {
   {{/-first}}
   {{/prioritizedContentTypes}}
   {{/formParams}}
-  @{{httpMethod}}("{{{path}}}")
+  @HTTP(method = "{{{httpMethod}}}", path = "{{{path}}}"{{#allParams}}{{#isBodyParam}}, hasBody = true{{/isBodyParam}}{{/allParams}})
   {{^doNotUseRx}}{{#useRxJava2}}{{#returnType}}Observable<{{#isResponseFile}}ResponseBody{{/isResponseFile}}{{^isResponseFile}}{{{returnType}}}{{/isResponseFile}}>{{/returnType}}{{^returnType}}Completable{{/returnType}}{{/useRxJava2}}{{#useRxJava3}}{{#returnType}}Observable<{{#isResponseFile}}ResponseBody{{/isResponseFile}}{{^isResponseFile}}{{{returnType}}}{{/isResponseFile}}>{{/returnType}}{{^returnType}}Completable{{/returnType}}{{/useRxJava3}}{{/doNotUseRx}}{{#doNotUseRx}}Call<{{#isResponseFile}}ResponseBody{{/isResponseFile}}{{^isResponseFile}}{{{returnType}}}{{^returnType}}Void{{/returnType}}{{/isResponseFile}}>{{/doNotUseRx}} {{operationId}}({{^allParams}});{{/allParams}}
     {{#allParams}}{{>libraries/retrofit2/queryParams}}{{>libraries/retrofit2/pathParams}}{{>libraries/retrofit2/headerParams}}{{>libraries/retrofit2/bodyParams}}{{>libraries/retrofit2/formParams}}{{^-last}}, {{/-last}}{{#-last}}
   );{{/-last}}{{/allParams}}
diff --git a/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/AnotherFakeApi.java b/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/AnotherFakeApi.java
index cde24069691..cffcafd7d76 100644
--- a/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/AnotherFakeApi.java
+++ b/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/AnotherFakeApi.java
@@ -29,7 +29,7 @@ public interface AnotherFakeApi {
   @Headers({
     "Content-Type:application/json"
   })
-  @PATCH("another-fake/dummy")
+  @HTTP(method = "PATCH", path = "another-fake/dummy", hasBody = true)
   Call<Client> call123testSpecialTags(
     @retrofit2.http.Header("uuid_test") UUID uuidTest, @retrofit2.http.Body Client body
   );
diff --git a/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/FakeApi.java b/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/FakeApi.java
index e00e4eb6812..8c629f9b8c4 100644
--- a/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/FakeApi.java
+++ b/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/FakeApi.java
@@ -35,7 +35,7 @@ public interface FakeApi {
   @Headers({
     "Content-Type:application/xml"
   })
-  @POST("fake/create_xml_item")
+  @HTTP(method = "POST", path = "fake/create_xml_item", hasBody = true)
   Call<Void> createXmlItem(
     @retrofit2.http.Body XmlItem xmlItem
   );
@@ -46,7 +46,7 @@ public interface FakeApi {
    * @param body Input boolean as post body (optional)
    * @return Call&lt;Boolean&gt;
    */
-  @POST("fake/outer/boolean")
+  @HTTP(method = "POST", path = "fake/outer/boolean", hasBody = true)
   Call<Boolean> fakeOuterBooleanSerialize(
     @retrofit2.http.Body Boolean body
   );
@@ -57,7 +57,7 @@ public interface FakeApi {
    * @param body Input composite as post body (optional)
    * @return Call&lt;OuterComposite&gt;
    */
-  @POST("fake/outer/composite")
+  @HTTP(method = "POST", path = "fake/outer/composite", hasBody = true)
   Call<OuterComposite> fakeOuterCompositeSerialize(
     @retrofit2.http.Body OuterComposite body
   );
@@ -68,7 +68,7 @@ public interface FakeApi {
    * @param body Input number as post body (optional)
    * @return Call&lt;BigDecimal&gt;
    */
-  @POST("fake/outer/number")
+  @HTTP(method = "POST", path = "fake/outer/number", hasBody = true)
   Call<BigDecimal> fakeOuterNumberSerialize(
     @retrofit2.http.Body BigDecimal body
   );
@@ -79,7 +79,7 @@ public interface FakeApi {
    * @param body Input string as post body (optional)
    * @return Call&lt;String&gt;
    */
-  @POST("fake/outer/string")
+  @HTTP(method = "POST", path = "fake/outer/string", hasBody = true)
   Call<String> fakeOuterStringSerialize(
     @retrofit2.http.Body String body
   );
@@ -93,7 +93,7 @@ public interface FakeApi {
   @Headers({
     "Content-Type:application/json"
   })
-  @PUT("fake/body-with-file-schema")
+  @HTTP(method = "PUT", path = "fake/body-with-file-schema", hasBody = true)
   Call<Void> testBodyWithFileSchema(
     @retrofit2.http.Body FileSchemaTestClass body
   );
@@ -108,7 +108,7 @@ public interface FakeApi {
   @Headers({
     "Content-Type:application/json"
   })
-  @PUT("fake/body-with-query-params")
+  @HTTP(method = "PUT", path = "fake/body-with-query-params", hasBody = true)
   Call<Void> testBodyWithQueryParams(
     @retrofit2.http.Query("query") String query, @retrofit2.http.Body User body
   );
@@ -122,7 +122,7 @@ public interface FakeApi {
   @Headers({
     "Content-Type:application/json"
   })
-  @PATCH("fake")
+  @HTTP(method = "PATCH", path = "fake", hasBody = true)
   Call<Client> testClientModel(
     @retrofit2.http.Body Client body
   );
@@ -147,7 +147,7 @@ public interface FakeApi {
    * @return Call&lt;Void&gt;
    */
   @retrofit2.http.FormUrlEncoded
-  @POST("fake")
+  @HTTP(method = "POST", path = "fake")
   Call<Void> testEndpointParameters(
     @retrofit2.http.Field("number") BigDecimal number, @retrofit2.http.Field("double") Double _double, @retrofit2.http.Field("pattern_without_delimiter") String patternWithoutDelimiter, @retrofit2.http.Field("byte") byte[] _byte, @retrofit2.http.Field("integer") Integer integer, @retrofit2.http.Field("int32") Integer int32, @retrofit2.http.Field("int64") Long int64, @retrofit2.http.Field("float") Float _float, @retrofit2.http.Field("string") String string, @retrofit2.http.Field("binary") MultipartBody.Part binary, @retrofit2.http.Field("date") LocalDate date, @retrofit2.http.Field("dateTime") OffsetDateTime dateTime, @retrofit2.http.Field("password") String password, @retrofit2.http.Field("callback") String paramCallback
   );
@@ -166,7 +166,7 @@ public interface FakeApi {
    * @return Call&lt;Void&gt;
    */
   @retrofit2.http.FormUrlEncoded
-  @GET("fake")
+  @HTTP(method = "GET", path = "fake")
   Call<Void> testEnumParameters(
     @retrofit2.http.Header("enum_header_string_array") List<String> enumHeaderStringArray, @retrofit2.http.Header("enum_header_string") String enumHeaderString, @retrofit2.http.Query("enum_query_string_array") CSVParams enumQueryStringArray, @retrofit2.http.Query("enum_query_string") String enumQueryString, @retrofit2.http.Query("enum_query_integer") Integer enumQueryInteger, @retrofit2.http.Query("enum_query_double") Double enumQueryDouble, @retrofit2.http.Field("enum_form_string_array") List<String> enumFormStringArray, @retrofit2.http.Field("enum_form_string") String enumFormString
   );
@@ -182,7 +182,7 @@ public interface FakeApi {
    * @param int64Group Integer in group parameters (optional)
    * @return Call&lt;Void&gt;
    */
-  @DELETE("fake")
+  @HTTP(method = "DELETE", path = "fake")
   Call<Void> testGroupParameters(
     @retrofit2.http.Query("required_string_group") Integer requiredStringGroup, @retrofit2.http.Header("required_boolean_group") Boolean requiredBooleanGroup, @retrofit2.http.Query("required_int64_group") Long requiredInt64Group, @retrofit2.http.Query("string_group") Integer stringGroup, @retrofit2.http.Header("boolean_group") Boolean booleanGroup, @retrofit2.http.Query("int64_group") Long int64Group
   );
@@ -196,7 +196,7 @@ public interface FakeApi {
   @Headers({
     "Content-Type:application/json"
   })
-  @POST("fake/inline-additionalProperties")
+  @HTTP(method = "POST", path = "fake/inline-additionalProperties", hasBody = true)
   Call<Void> testInlineAdditionalProperties(
     @retrofit2.http.Body Map<String, String> param
   );
@@ -209,7 +209,7 @@ public interface FakeApi {
    * @return Call&lt;Void&gt;
    */
   @retrofit2.http.FormUrlEncoded
-  @GET("fake/jsonFormData")
+  @HTTP(method = "GET", path = "fake/jsonFormData")
   Call<Void> testJsonFormData(
     @retrofit2.http.Field("param") String param, @retrofit2.http.Field("param2") String param2
   );
@@ -224,7 +224,7 @@ public interface FakeApi {
    * @param context  (required)
    * @return Call&lt;Void&gt;
    */
-  @PUT("fake/test-query-parameters")
+  @HTTP(method = "PUT", path = "fake/test-query-parameters")
   Call<Void> testQueryParameterCollectionFormat(
     @retrofit2.http.Query("pipe") CSVParams pipe, @retrofit2.http.Query("ioutil") CSVParams ioutil, @retrofit2.http.Query("http") SSVParams http, @retrofit2.http.Query("url") CSVParams url, @retrofit2.http.Query("context") List<String> context
   );
diff --git a/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/FakeClassnameTags123Api.java b/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/FakeClassnameTags123Api.java
index 849a8e5a8ee..5d6aceb4eb2 100644
--- a/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/FakeClassnameTags123Api.java
+++ b/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/FakeClassnameTags123Api.java
@@ -27,7 +27,7 @@ public interface FakeClassnameTags123Api {
   @Headers({
     "Content-Type:application/json"
   })
-  @PATCH("fake_classname_test")
+  @HTTP(method = "PATCH", path = "fake_classname_test", hasBody = true)
   Call<Client> testClassname(
     @retrofit2.http.Body Client body
   );
diff --git a/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/PetApi.java b/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/PetApi.java
index b77df3eb64e..8f5c542e012 100644
--- a/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/PetApi.java
+++ b/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/PetApi.java
@@ -30,7 +30,7 @@ public interface PetApi {
   @Headers({
     "Content-Type:application/json"
   })
-  @POST("pet")
+  @HTTP(method = "POST", path = "pet", hasBody = true)
   Call<Void> addPet(
     @retrofit2.http.Body Pet body
   );
@@ -42,7 +42,7 @@ public interface PetApi {
    * @param apiKey  (optional)
    * @return Call&lt;Void&gt;
    */
-  @DELETE("pet/{petId}")
+  @HTTP(method = "DELETE", path = "pet/{petId}")
   Call<Void> deletePet(
     @retrofit2.http.Path("petId") Long petId, @retrofit2.http.Header("api_key") String apiKey
   );
@@ -53,7 +53,7 @@ public interface PetApi {
    * @param status Status values that need to be considered for filter (required)
    * @return Call&lt;List&lt;Pet&gt;&gt;
    */
-  @GET("pet/findByStatus")
+  @HTTP(method = "GET", path = "pet/findByStatus")
   Call<List<Pet>> findPetsByStatus(
     @retrofit2.http.Query("status") CSVParams status
   );
@@ -66,7 +66,7 @@ public interface PetApi {
    * @deprecated
    */
   @Deprecated
-  @GET("pet/findByTags")
+  @HTTP(method = "GET", path = "pet/findByTags")
   Call<Set<Pet>> findPetsByTags(
     @retrofit2.http.Query("tags") CSVParams tags
   );
@@ -77,7 +77,7 @@ public interface PetApi {
    * @param petId ID of pet to return (required)
    * @return Call&lt;Pet&gt;
    */
-  @GET("pet/{petId}")
+  @HTTP(method = "GET", path = "pet/{petId}")
   Call<Pet> getPetById(
     @retrofit2.http.Path("petId") Long petId
   );
@@ -91,7 +91,7 @@ public interface PetApi {
   @Headers({
     "Content-Type:application/json"
   })
-  @PUT("pet")
+  @HTTP(method = "PUT", path = "pet", hasBody = true)
   Call<Void> updatePet(
     @retrofit2.http.Body Pet body
   );
@@ -105,7 +105,7 @@ public interface PetApi {
    * @return Call&lt;Void&gt;
    */
   @retrofit2.http.FormUrlEncoded
-  @POST("pet/{petId}")
+  @HTTP(method = "POST", path = "pet/{petId}")
   Call<Void> updatePetWithForm(
     @retrofit2.http.Path("petId") Long petId, @retrofit2.http.Field("name") String name, @retrofit2.http.Field("status") String status
   );
@@ -119,7 +119,7 @@ public interface PetApi {
    * @return Call&lt;ModelApiResponse&gt;
    */
   @retrofit2.http.Multipart
-  @POST("pet/{petId}/uploadImage")
+  @HTTP(method = "POST", path = "pet/{petId}/uploadImage")
   Call<ModelApiResponse> uploadFile(
     @retrofit2.http.Path("petId") Long petId, @retrofit2.http.Part("additionalMetadata") String additionalMetadata, @retrofit2.http.Part MultipartBody.Part _file
   );
@@ -133,7 +133,7 @@ public interface PetApi {
    * @return Call&lt;ModelApiResponse&gt;
    */
   @retrofit2.http.Multipart
-  @POST("fake/{petId}/uploadImageWithRequiredFile")
+  @HTTP(method = "POST", path = "fake/{petId}/uploadImageWithRequiredFile")
   Call<ModelApiResponse> uploadFileWithRequiredFile(
     @retrofit2.http.Path("petId") Long petId, @retrofit2.http.Part MultipartBody.Part requiredFile, @retrofit2.http.Part("additionalMetadata") String additionalMetadata
   );
diff --git a/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/StoreApi.java b/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/StoreApi.java
index cc41f2c78b6..4ce289e9e92 100644
--- a/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/StoreApi.java
+++ b/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/StoreApi.java
@@ -24,7 +24,7 @@ public interface StoreApi {
    * @param orderId ID of the order that needs to be deleted (required)
    * @return Call&lt;Void&gt;
    */
-  @DELETE("store/order/{order_id}")
+  @HTTP(method = "DELETE", path = "store/order/{order_id}")
   Call<Void> deleteOrder(
     @retrofit2.http.Path("order_id") String orderId
   );
@@ -34,7 +34,7 @@ public interface StoreApi {
    * Returns a map of status codes to quantities
    * @return Call&lt;Map&lt;String, Integer&gt;&gt;
    */
-  @GET("store/inventory")
+  @HTTP(method = "GET", path = "store/inventory")
   Call<Map<String, Integer>> getInventory();
     
 
@@ -44,7 +44,7 @@ public interface StoreApi {
    * @param orderId ID of pet that needs to be fetched (required)
    * @return Call&lt;Order&gt;
    */
-  @GET("store/order/{order_id}")
+  @HTTP(method = "GET", path = "store/order/{order_id}")
   Call<Order> getOrderById(
     @retrofit2.http.Path("order_id") Long orderId
   );
@@ -55,7 +55,7 @@ public interface StoreApi {
    * @param body order placed for purchasing the pet (required)
    * @return Call&lt;Order&gt;
    */
-  @POST("store/order")
+  @HTTP(method = "POST", path = "store/order", hasBody = true)
   Call<Order> placeOrder(
     @retrofit2.http.Body Order body
   );
diff --git a/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/UserApi.java b/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/UserApi.java
index d0618bbdf6c..45e1f664254 100644
--- a/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/UserApi.java
+++ b/samples/client/petstore/java/retrofit2/src/main/java/org/openapitools/client/api/UserApi.java
@@ -25,7 +25,7 @@ public interface UserApi {
    * @param body Created user object (required)
    * @return Call&lt;Void&gt;
    */
-  @POST("user")
+  @HTTP(method = "POST", path = "user", hasBody = true)
   Call<Void> createUser(
     @retrofit2.http.Body User body
   );
@@ -36,7 +36,7 @@ public interface UserApi {
    * @param body List of user object (required)
    * @return Call&lt;Void&gt;
    */
-  @POST("user/createWithArray")
+  @HTTP(method = "POST", path = "user/createWithArray", hasBody = true)
   Call<Void> createUsersWithArrayInput(
     @retrofit2.http.Body List<User> body
   );
@@ -47,7 +47,7 @@ public interface UserApi {
    * @param body List of user object (required)
    * @return Call&lt;Void&gt;
    */
-  @POST("user/createWithList")
+  @HTTP(method = "POST", path = "user/createWithList", hasBody = true)
   Call<Void> createUsersWithListInput(
     @retrofit2.http.Body List<User> body
   );
@@ -58,7 +58,7 @@ public interface UserApi {
    * @param username The name that needs to be deleted (required)
    * @return Call&lt;Void&gt;
    */
-  @DELETE("user/{username}")
+  @HTTP(method = "DELETE", path = "user/{username}")
   Call<Void> deleteUser(
     @retrofit2.http.Path("username") String username
   );
@@ -69,7 +69,7 @@ public interface UserApi {
    * @param username The name that needs to be fetched. Use user1 for testing. (required)
    * @return Call&lt;User&gt;
    */
-  @GET("user/{username}")
+  @HTTP(method = "GET", path = "user/{username}")
   Call<User> getUserByName(
     @retrofit2.http.Path("username") String username
   );
@@ -81,7 +81,7 @@ public interface UserApi {
    * @param password The password for login in clear text (required)
    * @return Call&lt;String&gt;
    */
-  @GET("user/login")
+  @HTTP(method = "GET", path = "user/login")
   Call<String> loginUser(
     @retrofit2.http.Query("username") String username, @retrofit2.http.Query("password") String password
   );
@@ -91,7 +91,7 @@ public interface UserApi {
    * 
    * @return Call&lt;Void&gt;
    */
-  @GET("user/logout")
+  @HTTP(method = "GET", path = "user/logout")
   Call<Void> logoutUser();
     
 
@@ -102,7 +102,7 @@ public interface UserApi {
    * @param body Updated user object (required)
    * @return Call&lt;Void&gt;
    */
-  @PUT("user/{username}")
+  @HTTP(method = "PUT", path = "user/{username}", hasBody = true)
   Call<Void> updateUser(
     @retrofit2.http.Path("username") String username, @retrofit2.http.Body User body
   );
diff --git a/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/AnotherFakeApi.java b/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/AnotherFakeApi.java
index 0a0bdb6eabf..252d64e02ab 100644
--- a/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/AnotherFakeApi.java
+++ b/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/AnotherFakeApi.java
@@ -30,7 +30,7 @@ public interface AnotherFakeApi {
   @Headers({
     "Content-Type:application/json"
   })
-  @PATCH("another-fake/dummy")
+  @HTTP(method = "PATCH", path = "another-fake/dummy", hasBody = true)
   Observable<Client> call123testSpecialTags(
     @retrofit2.http.Header("uuid_test") UUID uuidTest, @retrofit2.http.Body Client body
   );
diff --git a/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/FakeApi.java b/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/FakeApi.java
index 6347d08144f..a44e8d1e39b 100644
--- a/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/FakeApi.java
+++ b/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/FakeApi.java
@@ -36,7 +36,7 @@ public interface FakeApi {
   @Headers({
     "Content-Type:application/xml"
   })
-  @POST("fake/create_xml_item")
+  @HTTP(method = "POST", path = "fake/create_xml_item", hasBody = true)
   Completable createXmlItem(
     @retrofit2.http.Body XmlItem xmlItem
   );
@@ -47,7 +47,7 @@ public interface FakeApi {
    * @param body Input boolean as post body (optional)
    * @return Observable&lt;Boolean&gt;
    */
-  @POST("fake/outer/boolean")
+  @HTTP(method = "POST", path = "fake/outer/boolean", hasBody = true)
   Observable<Boolean> fakeOuterBooleanSerialize(
     @retrofit2.http.Body Boolean body
   );
@@ -58,7 +58,7 @@ public interface FakeApi {
    * @param body Input composite as post body (optional)
    * @return Observable&lt;OuterComposite&gt;
    */
-  @POST("fake/outer/composite")
+  @HTTP(method = "POST", path = "fake/outer/composite", hasBody = true)
   Observable<OuterComposite> fakeOuterCompositeSerialize(
     @retrofit2.http.Body OuterComposite body
   );
@@ -69,7 +69,7 @@ public interface FakeApi {
    * @param body Input number as post body (optional)
    * @return Observable&lt;BigDecimal&gt;
    */
-  @POST("fake/outer/number")
+  @HTTP(method = "POST", path = "fake/outer/number", hasBody = true)
   Observable<BigDecimal> fakeOuterNumberSerialize(
     @retrofit2.http.Body BigDecimal body
   );
@@ -80,7 +80,7 @@ public interface FakeApi {
    * @param body Input string as post body (optional)
    * @return Observable&lt;String&gt;
    */
-  @POST("fake/outer/string")
+  @HTTP(method = "POST", path = "fake/outer/string", hasBody = true)
   Observable<String> fakeOuterStringSerialize(
     @retrofit2.http.Body String body
   );
@@ -94,7 +94,7 @@ public interface FakeApi {
   @Headers({
     "Content-Type:application/json"
   })
-  @PUT("fake/body-with-file-schema")
+  @HTTP(method = "PUT", path = "fake/body-with-file-schema", hasBody = true)
   Completable testBodyWithFileSchema(
     @retrofit2.http.Body FileSchemaTestClass body
   );
@@ -109,7 +109,7 @@ public interface FakeApi {
   @Headers({
     "Content-Type:application/json"
   })
-  @PUT("fake/body-with-query-params")
+  @HTTP(method = "PUT", path = "fake/body-with-query-params", hasBody = true)
   Completable testBodyWithQueryParams(
     @retrofit2.http.Query("query") String query, @retrofit2.http.Body User body
   );
@@ -123,7 +123,7 @@ public interface FakeApi {
   @Headers({
     "Content-Type:application/json"
   })
-  @PATCH("fake")
+  @HTTP(method = "PATCH", path = "fake", hasBody = true)
   Observable<Client> testClientModel(
     @retrofit2.http.Body Client body
   );
@@ -148,7 +148,7 @@ public interface FakeApi {
    * @return Completable
    */
   @retrofit2.http.FormUrlEncoded
-  @POST("fake")
+  @HTTP(method = "POST", path = "fake")
   Completable testEndpointParameters(
     @retrofit2.http.Field("number") BigDecimal number, @retrofit2.http.Field("double") Double _double, @retrofit2.http.Field("pattern_without_delimiter") String patternWithoutDelimiter, @retrofit2.http.Field("byte") byte[] _byte, @retrofit2.http.Field("integer") Integer integer, @retrofit2.http.Field("int32") Integer int32, @retrofit2.http.Field("int64") Long int64, @retrofit2.http.Field("float") Float _float, @retrofit2.http.Field("string") String string, @retrofit2.http.Field("binary") MultipartBody.Part binary, @retrofit2.http.Field("date") LocalDate date, @retrofit2.http.Field("dateTime") OffsetDateTime dateTime, @retrofit2.http.Field("password") String password, @retrofit2.http.Field("callback") String paramCallback
   );
@@ -167,7 +167,7 @@ public interface FakeApi {
    * @return Completable
    */
   @retrofit2.http.FormUrlEncoded
-  @GET("fake")
+  @HTTP(method = "GET", path = "fake")
   Completable testEnumParameters(
     @retrofit2.http.Header("enum_header_string_array") List<String> enumHeaderStringArray, @retrofit2.http.Header("enum_header_string") String enumHeaderString, @retrofit2.http.Query("enum_query_string_array") CSVParams enumQueryStringArray, @retrofit2.http.Query("enum_query_string") String enumQueryString, @retrofit2.http.Query("enum_query_integer") Integer enumQueryInteger, @retrofit2.http.Query("enum_query_double") Double enumQueryDouble, @retrofit2.http.Field("enum_form_string_array") List<String> enumFormStringArray, @retrofit2.http.Field("enum_form_string") String enumFormString
   );
@@ -183,7 +183,7 @@ public interface FakeApi {
    * @param int64Group Integer in group parameters (optional)
    * @return Completable
    */
-  @DELETE("fake")
+  @HTTP(method = "DELETE", path = "fake")
   Completable testGroupParameters(
     @retrofit2.http.Query("required_string_group") Integer requiredStringGroup, @retrofit2.http.Header("required_boolean_group") Boolean requiredBooleanGroup, @retrofit2.http.Query("required_int64_group") Long requiredInt64Group, @retrofit2.http.Query("string_group") Integer stringGroup, @retrofit2.http.Header("boolean_group") Boolean booleanGroup, @retrofit2.http.Query("int64_group") Long int64Group
   );
@@ -197,7 +197,7 @@ public interface FakeApi {
   @Headers({
     "Content-Type:application/json"
   })
-  @POST("fake/inline-additionalProperties")
+  @HTTP(method = "POST", path = "fake/inline-additionalProperties", hasBody = true)
   Completable testInlineAdditionalProperties(
     @retrofit2.http.Body Map<String, String> param
   );
@@ -210,7 +210,7 @@ public interface FakeApi {
    * @return Completable
    */
   @retrofit2.http.FormUrlEncoded
-  @GET("fake/jsonFormData")
+  @HTTP(method = "GET", path = "fake/jsonFormData")
   Completable testJsonFormData(
     @retrofit2.http.Field("param") String param, @retrofit2.http.Field("param2") String param2
   );
@@ -225,7 +225,7 @@ public interface FakeApi {
    * @param context  (required)
    * @return Completable
    */
-  @PUT("fake/test-query-parameters")
+  @HTTP(method = "PUT", path = "fake/test-query-parameters")
   Completable testQueryParameterCollectionFormat(
     @retrofit2.http.Query("pipe") CSVParams pipe, @retrofit2.http.Query("ioutil") CSVParams ioutil, @retrofit2.http.Query("http") SSVParams http, @retrofit2.http.Query("url") CSVParams url, @retrofit2.http.Query("context") List<String> context
   );
diff --git a/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/FakeClassnameTags123Api.java b/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/FakeClassnameTags123Api.java
index 5b14d084bbb..311ada0ba72 100644
--- a/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/FakeClassnameTags123Api.java
+++ b/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/FakeClassnameTags123Api.java
@@ -28,7 +28,7 @@ public interface FakeClassnameTags123Api {
   @Headers({
     "Content-Type:application/json"
   })
-  @PATCH("fake_classname_test")
+  @HTTP(method = "PATCH", path = "fake_classname_test", hasBody = true)
   Observable<Client> testClassname(
     @retrofit2.http.Body Client body
   );
diff --git a/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/PetApi.java b/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/PetApi.java
index d4de52bf6a4..776c2c8d52c 100644
--- a/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/PetApi.java
+++ b/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/PetApi.java
@@ -31,7 +31,7 @@ public interface PetApi {
   @Headers({
     "Content-Type:application/json"
   })
-  @POST("pet")
+  @HTTP(method = "POST", path = "pet", hasBody = true)
   Completable addPet(
     @retrofit2.http.Body Pet body
   );
@@ -43,7 +43,7 @@ public interface PetApi {
    * @param apiKey  (optional)
    * @return Completable
    */
-  @DELETE("pet/{petId}")
+  @HTTP(method = "DELETE", path = "pet/{petId}")
   Completable deletePet(
     @retrofit2.http.Path("petId") Long petId, @retrofit2.http.Header("api_key") String apiKey
   );
@@ -54,7 +54,7 @@ public interface PetApi {
    * @param status Status values that need to be considered for filter (required)
    * @return Observable&lt;List&lt;Pet&gt;&gt;
    */
-  @GET("pet/findByStatus")
+  @HTTP(method = "GET", path = "pet/findByStatus")
   Observable<List<Pet>> findPetsByStatus(
     @retrofit2.http.Query("status") CSVParams status
   );
@@ -67,7 +67,7 @@ public interface PetApi {
    * @deprecated
    */
   @Deprecated
-  @GET("pet/findByTags")
+  @HTTP(method = "GET", path = "pet/findByTags")
   Observable<Set<Pet>> findPetsByTags(
     @retrofit2.http.Query("tags") CSVParams tags
   );
@@ -78,7 +78,7 @@ public interface PetApi {
    * @param petId ID of pet to return (required)
    * @return Observable&lt;Pet&gt;
    */
-  @GET("pet/{petId}")
+  @HTTP(method = "GET", path = "pet/{petId}")
   Observable<Pet> getPetById(
     @retrofit2.http.Path("petId") Long petId
   );
@@ -92,7 +92,7 @@ public interface PetApi {
   @Headers({
     "Content-Type:application/json"
   })
-  @PUT("pet")
+  @HTTP(method = "PUT", path = "pet", hasBody = true)
   Completable updatePet(
     @retrofit2.http.Body Pet body
   );
@@ -106,7 +106,7 @@ public interface PetApi {
    * @return Completable
    */
   @retrofit2.http.FormUrlEncoded
-  @POST("pet/{petId}")
+  @HTTP(method = "POST", path = "pet/{petId}")
   Completable updatePetWithForm(
     @retrofit2.http.Path("petId") Long petId, @retrofit2.http.Field("name") String name, @retrofit2.http.Field("status") String status
   );
@@ -120,7 +120,7 @@ public interface PetApi {
    * @return Observable&lt;ModelApiResponse&gt;
    */
   @retrofit2.http.Multipart
-  @POST("pet/{petId}/uploadImage")
+  @HTTP(method = "POST", path = "pet/{petId}/uploadImage")
   Observable<ModelApiResponse> uploadFile(
     @retrofit2.http.Path("petId") Long petId, @retrofit2.http.Part("additionalMetadata") String additionalMetadata, @retrofit2.http.Part MultipartBody.Part _file
   );
@@ -134,7 +134,7 @@ public interface PetApi {
    * @return Observable&lt;ModelApiResponse&gt;
    */
   @retrofit2.http.Multipart
-  @POST("fake/{petId}/uploadImageWithRequiredFile")
+  @HTTP(method = "POST", path = "fake/{petId}/uploadImageWithRequiredFile")
   Observable<ModelApiResponse> uploadFileWithRequiredFile(
     @retrofit2.http.Path("petId") Long petId, @retrofit2.http.Part MultipartBody.Part requiredFile, @retrofit2.http.Part("additionalMetadata") String additionalMetadata
   );
diff --git a/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/StoreApi.java b/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/StoreApi.java
index d49ab1a2005..6445912aa5b 100644
--- a/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/StoreApi.java
+++ b/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/StoreApi.java
@@ -25,7 +25,7 @@ public interface StoreApi {
    * @param orderId ID of the order that needs to be deleted (required)
    * @return Completable
    */
-  @DELETE("store/order/{order_id}")
+  @HTTP(method = "DELETE", path = "store/order/{order_id}")
   Completable deleteOrder(
     @retrofit2.http.Path("order_id") String orderId
   );
@@ -35,7 +35,7 @@ public interface StoreApi {
    * Returns a map of status codes to quantities
    * @return Observable&lt;Map&lt;String, Integer&gt;&gt;
    */
-  @GET("store/inventory")
+  @HTTP(method = "GET", path = "store/inventory")
   Observable<Map<String, Integer>> getInventory();
     
 
@@ -45,7 +45,7 @@ public interface StoreApi {
    * @param orderId ID of pet that needs to be fetched (required)
    * @return Observable&lt;Order&gt;
    */
-  @GET("store/order/{order_id}")
+  @HTTP(method = "GET", path = "store/order/{order_id}")
   Observable<Order> getOrderById(
     @retrofit2.http.Path("order_id") Long orderId
   );
@@ -56,7 +56,7 @@ public interface StoreApi {
    * @param body order placed for purchasing the pet (required)
    * @return Observable&lt;Order&gt;
    */
-  @POST("store/order")
+  @HTTP(method = "POST", path = "store/order", hasBody = true)
   Observable<Order> placeOrder(
     @retrofit2.http.Body Order body
   );
diff --git a/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/UserApi.java b/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/UserApi.java
index ed1141d5376..9b253eddbc5 100644
--- a/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/UserApi.java
+++ b/samples/client/petstore/java/retrofit2rx2/src/main/java/org/openapitools/client/api/UserApi.java
@@ -26,7 +26,7 @@ public interface UserApi {
    * @param body Created user object (required)
    * @return Completable
    */
-  @POST("user")
+  @HTTP(method = "POST", path = "user", hasBody = true)
   Completable createUser(
     @retrofit2.http.Body User body
   );
@@ -37,7 +37,7 @@ public interface UserApi {
    * @param body List of user object (required)
    * @return Completable
    */
-  @POST("user/createWithArray")
+  @HTTP(method = "POST", path = "user/createWithArray", hasBody = true)
   Completable createUsersWithArrayInput(
     @retrofit2.http.Body List<User> body
   );
@@ -48,7 +48,7 @@ public interface UserApi {
    * @param body List of user object (required)
    * @return Completable
    */
-  @POST("user/createWithList")
+  @HTTP(method = "POST", path = "user/createWithList", hasBody = true)
   Completable createUsersWithListInput(
     @retrofit2.http.Body List<User> body
   );
@@ -59,7 +59,7 @@ public interface UserApi {
    * @param username The name that needs to be deleted (required)
    * @return Completable
    */
-  @DELETE("user/{username}")
+  @HTTP(method = "DELETE", path = "user/{username}")
   Completable deleteUser(
     @retrofit2.http.Path("username") String username
   );
@@ -70,7 +70,7 @@ public interface UserApi {
    * @param username The name that needs to be fetched. Use user1 for testing. (required)
    * @return Observable&lt;User&gt;
    */
-  @GET("user/{username}")
+  @HTTP(method = "GET", path = "user/{username}")
   Observable<User> getUserByName(
     @retrofit2.http.Path("username") String username
   );
@@ -82,7 +82,7 @@ public interface UserApi {
    * @param password The password for login in clear text (required)
    * @return Observable&lt;String&gt;
    */
-  @GET("user/login")
+  @HTTP(method = "GET", path = "user/login")
   Observable<String> loginUser(
     @retrofit2.http.Query("username") String username, @retrofit2.http.Query("password") String password
   );
@@ -92,7 +92,7 @@ public interface UserApi {
    * 
    * @return Completable
    */
-  @GET("user/logout")
+  @HTTP(method = "GET", path = "user/logout")
   Completable logoutUser();
     
 
@@ -103,7 +103,7 @@ public interface UserApi {
    * @param body Updated user object (required)
    * @return Completable
    */
-  @PUT("user/{username}")
+  @HTTP(method = "PUT", path = "user/{username}", hasBody = true)
   Completable updateUser(
     @retrofit2.http.Path("username") String username, @retrofit2.http.Body User body
   );
diff --git a/samples/client/petstore/java/retrofit2rx3/src/main/java/org/openapitools/client/api/AnotherFakeApi.java b/samples/client/petstore/java/retrofit2rx3/src/main/java/org/openapitools/client/api/AnotherFakeApi.java
index 9c9c5db11c2..74fa0af08b0 100644
--- a/samples/client/petstore/java/retrofit2rx3/src/main/java/org/openapitools/client/api/AnotherFakeApi.java
+++ b/samples/client/petstore/java/retrofit2rx3/src/main/java/org/openapitools/client/api/AnotherFakeApi.java
@@ -30,7 +30,7 @@ public interface AnotherFakeApi {
   @Headers({
     "Content-Type:application/json"
   })
-  @PATCH("another-fake/dummy")
+  @HTTP(method = "PATCH", path = "another-fake/dummy", hasBody = true)
   Observable<Client> call123testSpecialTags(
     @retrofit2.http.Header("uuid_test") UUID uuidTest, @retrofit2.http.Body Client body
   );
diff --git a/samples/client/petstore/java/retrofit2rx3/src/main/java/org/openapitools/client/api/FakeApi.java b/samples/client/petstore/java/retrofit2rx3/src/main/java/org/openapitools/client/api/FakeApi.java
index 0cabd816244..a499c7d4419 100644
--- a/samples/client/petstore/java/retrofit2rx3/src/main/java/org/openapitools/client/api/FakeApi.java
+++ b/samples/client/petstore/java/retrofit2rx3/src/main/java/org/openapitools/client/api/FakeApi.java
@@ -36,7 +36,7 @@ public interface FakeApi {
   @Headers({
     "Content-Type:application/xml"
   })
-  @POST("fake/create_xml_item")
+  @HTTP(method = "POST", path = "fake/create_xml_item", hasBody = true)
   Completable createXmlItem(
     @retrofit2.http.Body XmlItem xmlItem
   );
@@ -47,7 +47,7 @@ public interface FakeApi {
    * @param body Input boolean as post body (optional)
    * @return Observable&lt;Boolean&gt;
    */
-  @POST("fake/outer/boolean")
+  @HTTP(method = "POST", path = "fake/outer/boolean", hasBody = true)
   Observable<Boolean> fakeOuterBooleanSerialize(
     @retrofit2.http.Body Boolean body
   );
@@ -58,7 +58,7 @@ public interface FakeApi {
    * @param body Input composite as post body (optional)
    * @return Observable&lt;OuterComposite&gt;
    */
-  @POST("fake/outer/composite")
+  @HTTP(method = "POST", path = "fake/outer/composite", hasBody = true)
   Observable<OuterComposite> fakeOuterCompositeSerialize(
     @retrofit2.http.Body OuterComposite body
   );
@@ -69,7 +69,7 @@ public interface FakeApi {
    * @param body Input number as post body (optional)
    * @return Observable&lt;BigDecimal&gt;
    */
-  @POST("fake/outer/number")
+  @HTTP(method = "POST", path = "fake/outer/number", hasBody = true)
   Observable<BigDecimal> fakeOuterNumberSerialize(
     @retrofit2.http.Body BigDecimal body
   );
@@ -80,7 +80,7 @@ public interface FakeApi {
    * @param body Input string as post body (optional)
    * @return Observable&lt;String&gt;
    */
-  @POST("fake/outer/string")
+  @HTTP(method = "POST", path = "fake/outer/string", hasBody = true)
   Observable<String> fakeOuterStringSerialize(
     @retrofit2.http.Body String body
   );
@@ -94,7 +94,7 @@ public interface FakeApi {
   @Headers({
     "Content-Type:application/json"
   })
-  @PUT("fake/body-with-file-schema")
+  @HTTP(method = "PUT", path = "fake/body-with-file-schema", hasBody = true)
   Completable testBodyWithFileSchema(
     @retrofit2.http.Body FileSchemaTestClass body
   );
@@ -109,7 +109,7 @@ public interface FakeApi {
   @Headers({
     "Content-Type:application/json"
   })
-  @PUT("fake/body-with-query-params")
+  @HTTP(method = "PUT", path = "fake/body-with-query-params", hasBody = true)
   Completable testBodyWithQueryParams(
     @retrofit2.http.Query("query") String query, @retrofit2.http.Body User body
   );
@@ -123,7 +123,7 @@ public interface FakeApi {
   @Headers({
     "Content-Type:application/json"
   })
-  @PATCH("fake")
+  @HTTP(method = "PATCH", path = "fake", hasBody = true)
   Observable<Client> testClientModel(
     @retrofit2.http.Body Client body
   );
@@ -148,7 +148,7 @@ public interface FakeApi {
    * @return Completable
    */
   @retrofit2.http.FormUrlEncoded
-  @POST("fake")
+  @HTTP(method = "POST", path = "fake")
   Completable testEndpointParameters(
     @retrofit2.http.Field("number") BigDecimal number, @retrofit2.http.Field("double") Double _double, @retrofit2.http.Field("pattern_without_delimiter") String patternWithoutDelimiter, @retrofit2.http.Field("byte") byte[] _byte, @retrofit2.http.Field("integer") Integer integer, @retrofit2.http.Field("int32") Integer int32, @retrofit2.http.Field("int64") Long int64, @retrofit2.http.Field("float") Float _float, @retrofit2.http.Field("string") String string, @retrofit2.http.Field("binary") MultipartBody.Part binary, @retrofit2.http.Field("date") LocalDate date, @retrofit2.http.Field("dateTime") OffsetDateTime dateTime, @retrofit2.http.Field("password") String password, @retrofit2.http.Field("callback") String paramCallback
   );
@@ -167,7 +167,7 @@ public interface FakeApi {
    * @return Completable
    */
   @retrofit2.http.FormUrlEncoded
-  @GET("fake")
+  @HTTP(method = "GET", path = "fake")
   Completable testEnumParameters(
     @retrofit2.http.Header("enum_header_string_array") List<String> enumHeaderStringArray, @retrofit2.http.Header("enum_header_string") String enumHeaderString, @retrofit2.http.Query("enum_query_string_array") CSVParams enumQueryStringArray, @retrofit2.http.Query("enum_query_string") String enumQueryString, @retrofit2.http.Query("enum_query_integer") Integer enumQueryInteger, @retrofit2.http.Query("enum_query_double") Double enumQueryDouble, @retrofit2.http.Field("enum_form_string_array") List<String> enumFormStringArray, @retrofit2.http.Field("enum_form_string") String enumFormString
   );
@@ -183,7 +183,7 @@ public interface FakeApi {
    * @param int64Group Integer in group parameters (optional)
    * @return Completable
    */
-  @DELETE("fake")
+  @HTTP(method = "DELETE", path = "fake")
   Completable testGroupParameters(
     @retrofit2.http.Query("required_string_group") Integer requiredStringGroup, @retrofit2.http.Header("required_boolean_group") Boolean requiredBooleanGroup, @retrofit2.http.Query("required_int64_group") Long requiredInt64Group, @retrofit2.http.Query("string_group") Integer stringGroup, @retrofit2.http.Header("boolean_group") Boolean booleanGroup, @retrofit2.http.Query("int64_group") Long int64Group
   );
@@ -197,7 +197,7 @@ public interface FakeApi {
   @Headers({
     "Content-Type:application/json"
   })
-  @POST("fake/inline-additionalProperties")
+  @HTTP(method = "POST", path = "fake/inline-additionalProperties", hasBody = true)
   Completable testInlineAdditionalProperties(
     @retrofit2.http.Body Map<String, String> param
   );
@@ -210,7 +210,7 @@ public interface FakeApi {
    * @return Completable
    */
   @retrofit2.http.FormUrlEncoded
-  @GET("fake/jsonFormData")
+  @HTTP(method = "GET", path = "fake/jsonFormData")
   Completable testJsonFormData(
     @retrofit2.http.Field("param") String param, @retrofit2.http.Field("param2") String param2
   );
@@ -225,7 +225,7 @@ public interface FakeApi {
    * @param context  (required)
    * @return Completable
    */
-  @PUT("fake/test-query-parameters")
+  @HTTP(method = "PUT", path = "fake/test-query-parameters")
   Completable testQueryParameterCollectionFormat(
     @retrofit2.http.Query("pipe") CSVParams pipe, @retrofit2.http.Query("ioutil") CSVParams ioutil, @retrofit2.http.Query("http") SSVParams http, @retrofit2.http.Query("url") CSVParams url, @retrofit2.http.Query("context") List<String> context
   );
diff --git a/samples/client/petstore/java/retrofit2rx3/src/main/java/org/openapitools/client/api/FakeClassnameTags123Api.java b/samples/client/petstore/java/retrofit2rx3/src/main/java/org/openapitools/client/api/FakeClassnameTags123Api.java
index 22e1b056130..345906a6d5f 100644
--- a/samples/client/petstore/java/retrofit2rx3/src/main/java/org/openapitools/client/api/FakeClassnameTags123Api.java
+++ b/samples/client/petstore/java/retrofit2rx3/src/main/java/org/openapitools/client/api/FakeClassnameTags123Api.java
@@ -28,7 +28,7 @@ public interface FakeClassnameTags123Api {
   @Headers({
     "Content-Type:application/json"
   })
-  @PATCH("fake_classname_test")
+  @HTTP(method = "PATCH", path = "fake_classname_test", hasBody = true)
   Observable<Client> testClassname(
     @retrofit2.http.Body Client body
   );
diff --git a/samples/client/petstore/java/retrofit2rx3/src/main/java/org/openapitools/client/api/PetApi.java b/samples/client/petstore/java/retrofit2rx3/src/main/java/org/openapitools/client/api/PetApi.java
index 8f97dc331e7..4529cbdc735 100644
--- a/samples/client/petstore/java/retrofit2rx3/src/main/java/org/openapitools/client/api/PetApi.java
+++ b/samples/client/petstore/java/retrofit2rx3/src/main/java/org/openapitools/client/api/PetApi.java
@@ -31,7 +31,7 @@ public interface PetApi {
   @Headers({
     "Content-Type:application/json"
   })
-  @POST("pet")
+  @HTTP(method = "POST", path = "pet", hasBody = true)
   Completable addPet(
     @retrofit2.http.Body Pet body
   );
@@ -43,7 +43,7 @@ public interface PetApi {
    * @param apiKey  (optional)
    * @return Completable
    */
-  @DELETE("pet/{petId}")
+  @HTTP(method = "DELETE", path = "pet/{petId}")
   Completable deletePet(
     @retrofit2.http.Path("petId") Long petId, @retrofit2.http.Header("api_key") String apiKey
   );
@@ -54,7 +54,7 @@ public interface PetApi {
    * @param status Status values that need to be considered for filter (required)
    * @return Observable&lt;List&lt;Pet&gt;&gt;
    */
-  @GET("pet/findByStatus")
+  @HTTP(method = "GET", path = "pet/findByStatus")
   Observable<List<Pet>> findPetsByStatus(
     @retrofit2.http.Query("status") CSVParams status
   );
@@ -67,7 +67,7 @@ public interface PetApi {
    * @deprecated
    */
   @Deprecated
-  @GET("pet/findByTags")
+  @HTTP(method = "GET", path = "pet/findByTags")
   Observable<Set<Pet>> findPetsByTags(
     @retrofit2.http.Query("tags") CSVParams tags
   );
@@ -78,7 +78,7 @@ public interface PetApi {
    * @param petId ID of pet to return (required)
    * @return Observable&lt;Pet&gt;
    */
-  @GET("pet/{petId}")
+  @HTTP(method = "GET", path = "pet/{petId}")
   Observable<Pet> getPetById(
     @retrofit2.http.Path("petId") Long petId
   );
@@ -92,7 +92,7 @@ public interface PetApi {
   @Headers({
     "Content-Type:application/json"
   })
-  @PUT("pet")
+  @HTTP(method = "PUT", path = "pet", hasBody = true)
   Completable updatePet(
     @retrofit2.http.Body Pet body
   );
@@ -106,7 +106,7 @@ public interface PetApi {
    * @return Completable
    */
   @retrofit2.http.FormUrlEncoded
-  @POST("pet/{petId}")
+  @HTTP(method = "POST", path = "pet/{petId}")
   Completable updatePetWithForm(
     @retrofit2.http.Path("petId") Long petId, @retrofit2.http.Field("name") String name, @retrofit2.http.Field("status") String status
   );
@@ -120,7 +120,7 @@ public interface PetApi {
    * @return Observable&lt;ModelApiResponse&gt;
    */
   @retrofit2.http.Multipart
-  @POST("pet/{petId}/uploadImage")
+  @HTTP(method = "POST", path = "pet/{petId}/uploadImage")
   Observable<ModelApiResponse> uploadFile(
     @retrofit2.http.Path("petId") Long petId, @retrofit2.http.Part("additionalMetadata") String additionalMetadata, @retrofit2.http.Part MultipartBody.Part _file
   );
@@ -134,7 +134,7 @@ public interface PetApi {
    * @return Observable&lt;ModelApiResponse&gt;
    */
   @retrofit2.http.Multipart
-  @POST("fake/{petId}/uploadImageWithRequiredFile")
+  @HTTP(method = "POST", path = "fake/{petId}/uploadImageWithRequiredFile")
   Observable<ModelApiResponse> uploadFileWithRequiredFile(
     @retrofit2.http.Path("petId") Long petId, @retrofit2.http.Part MultipartBody.Part requiredFile, @retrofit2.http.Part("additionalMetadata") String additionalMetadata
   );
diff --git a/samples/client/petstore/java/retrofit2rx3/src/main/java/org/openapitools/client/api/StoreApi.java b/samples/client/petstore/java/retrofit2rx3/src/main/java/org/openapitools/client/api/StoreApi.java
index 2439a4bcb5d..5c5b4146413 100644
--- a/samples/client/petstore/java/retrofit2rx3/src/main/java/org/openapitools/client/api/StoreApi.java
+++ b/samples/client/petstore/java/retrofit2rx3/src/main/java/org/openapitools/client/api/StoreApi.java
@@ -25,7 +25,7 @@ public interface StoreApi {
    * @param orderId ID of the order that needs to be deleted (required)
    * @return Completable
    */
-  @DELETE("store/order/{order_id}")
+  @HTTP(method = "DELETE", path = "store/order/{order_id}")
   Completable deleteOrder(
     @retrofit2.http.Path("order_id") String orderId
   );
@@ -35,7 +35,7 @@ public interface StoreApi {
    * Returns a map of status codes to quantities
    * @return Observable&lt;Map&lt;String, Integer&gt;&gt;
    */
-  @GET("store/inventory")
+  @HTTP(method = "GET", path = "store/inventory")
   Observable<Map<String, Integer>> getInventory();
     
 
@@ -45,7 +45,7 @@ public interface StoreApi {
    * @param orderId ID of pet that needs to be fetched (required)
    * @return Observable&lt;Order&gt;
    */
-  @GET("store/order/{order_id}")
+  @HTTP(method = "GET", path = "store/order/{order_id}")
   Observable<Order> getOrderById(
     @retrofit2.http.Path("order_id") Long orderId
   );
@@ -56,7 +56,7 @@ public interface StoreApi {
    * @param body order placed for purchasing the pet (required)
    * @return Observable&lt;Order&gt;
    */
-  @POST("store/order")
+  @HTTP(method = "POST", path = "store/order", hasBody = true)
   Observable<Order> placeOrder(
     @retrofit2.http.Body Order body
   );
diff --git a/samples/client/petstore/java/retrofit2rx3/src/main/java/org/openapitools/client/api/UserApi.java b/samples/client/petstore/java/retrofit2rx3/src/main/java/org/openapitools/client/api/UserApi.java
index 920589a609c..455eaec23a0 100644
--- a/samples/client/petstore/java/retrofit2rx3/src/main/java/org/openapitools/client/api/UserApi.java
+++ b/samples/client/petstore/java/retrofit2rx3/src/main/java/org/openapitools/client/api/UserApi.java
@@ -26,7 +26,7 @@ public interface UserApi {
    * @param body Created user object (required)
    * @return Completable
    */
-  @POST("user")
+  @HTTP(method = "POST", path = "user", hasBody = true)
   Completable createUser(
     @retrofit2.http.Body User body
   );
@@ -37,7 +37,7 @@ public interface UserApi {
    * @param body List of user object (required)
    * @return Completable
    */
-  @POST("user/createWithArray")
+  @HTTP(method = "POST", path = "user/createWithArray", hasBody = true)
   Completable createUsersWithArrayInput(
     @retrofit2.http.Body List<User> body
   );
@@ -48,7 +48,7 @@ public interface UserApi {
    * @param body List of user object (required)
    * @return Completable
    */
-  @POST("user/createWithList")
+  @HTTP(method = "POST", path = "user/createWithList", hasBody = true)
   Completable createUsersWithListInput(
     @retrofit2.http.Body List<User> body
   );
@@ -59,7 +59,7 @@ public interface UserApi {
    * @param username The name that needs to be deleted (required)
    * @return Completable
    */
-  @DELETE("user/{username}")
+  @HTTP(method = "DELETE", path = "user/{username}")
   Completable deleteUser(
     @retrofit2.http.Path("username") String username
   );
@@ -70,7 +70,7 @@ public interface UserApi {
    * @param username The name that needs to be fetched. Use user1 for testing. (required)
    * @return Observable&lt;User&gt;
    */
-  @GET("user/{username}")
+  @HTTP(method = "GET", path = "user/{username}")
   Observable<User> getUserByName(
     @retrofit2.http.Path("username") String username
   );
@@ -82,7 +82,7 @@ public interface UserApi {
    * @param password The password for login in clear text (required)
    * @return Observable&lt;String&gt;
    */
-  @GET("user/login")
+  @HTTP(method = "GET", path = "user/login")
   Observable<String> loginUser(
     @retrofit2.http.Query("username") String username, @retrofit2.http.Query("password") String password
   );
@@ -92,7 +92,7 @@ public interface UserApi {
    * 
    * @return Completable
    */
-  @GET("user/logout")
+  @HTTP(method = "GET", path = "user/logout")
   Completable logoutUser();
     
 
@@ -103,7 +103,7 @@ public interface UserApi {
    * @param body Updated user object (required)
    * @return Completable
    */
-  @PUT("user/{username}")
+  @HTTP(method = "PUT", path = "user/{username}", hasBody = true)
   Completable updateUser(
     @retrofit2.http.Path("username") String username, @retrofit2.http.Body User body
   );