acacode · tlenclos · Nov 24, 2025
diff --git a/templates/default/procedure-call.ejs b/templates/default/procedure-call.ejs
@@ -81,6 +81,13 @@ const describeReturnType = () => {
 
 const isValidIdentifier = (name) => /^[A-Za-z_$][A-Za-z0-9_$]*$/.test(name);
 
+const getSuccessResponseTypes = () => {
+  const successResponses = responseBodyInfo.responses.filter(response => response.isSuccess);
+
+  return config.Ts.UnionType(successResponses.map((response) => response.type)) || "any";
+}
+
+
 %>
 /**
 <%~ routeDocs.description %>
@@ -91,7 +98,7 @@ const isValidIdentifier = (name) => /^[A-Za-z_$][A-Za-z0-9_$]*$/.test(name);
 
  */
 <% if (isValidIdentifier(route.routeName.usage)) { %><%~ route.routeName.usage %><%~ route.namespace ? ': ' : ' = ' %><% } else { %>"<%~ route.routeName.usage %>"<%~ route.namespace ? ': ' : ' = ' %><% } %>(<%~ wrapperArgs %>)<%~ config.toJS ? `: ${describeReturnType()}` : "" %> =>
-    <%~ config.singleHttpClient ? 'this.http.request' : 'this.request' %><<%~ type %>, <%~ errorType %>>({
+    <%~ config.singleHttpClient ? 'this.http.request' : 'this.request' %><<%~ `${getSuccessResponseTypes()}` %>, <%~ errorType %>>({
         path: `<%~ path %>`,
         method: '<%~ _.upperCase(method) %>',
         <%~ queryTmpl ? `query: ${queryTmpl},` : '' %>

diff --git a/tests/__snapshots__/extended.test.ts.snap b/tests/__snapshots__/extended.test.ts.snap
@@ -8124,7 +8124,7 @@ export class Api<
      * @request GET:/v2
      */
     getVersionDetailsv2: (params: RequestParams = {}) =>
-      this.request<GetVersionDetailsv2Data, any>({
+      this.request<GetVersionDetailsv2Data | void, any>({
         path: \`/v2\`,
         method: "GET",
         format: "json",
@@ -8490,7 +8490,7 @@ export class Api<
      * @request GET:/v2
      */
     getVersionDetailsv2: (params: RequestParams = {}) =>
-      this.request<GetVersionDetailsv2Data, any>({
+      this.request<GetVersionDetailsv2Data | void, any>({
         path: \`/v2\`,
         method: "GET",
         format: "json",
@@ -9600,7 +9600,7 @@ export class Api<
       { job, ...query }: SignRetrieveParams,
       params: RequestParams = {},
     ) =>
-      this.request<SignRetrieveData, SignRetrieveError>({
+      this.request<SignRetrieveData | void, SignRetrieveError>({
         path: \`/scope/\${job}\`,
         method: "GET",
         format: "json",
@@ -9618,7 +9618,7 @@ export class Api<
       { job, ...query }: SignRetrieveHeadParams,
       params: RequestParams = {},
     ) =>
-      this.request<SignRetrieveHeadData, SignRetrieveHeadError>({
+      this.request<SignRetrieveHeadData | void, SignRetrieveHeadError>({
         path: \`/scope/\${job}\`,
         method: "HEAD",
         ...params,
@@ -11330,7 +11330,7 @@ export class Api<
       parameters: TdeCertificate,
       params: RequestParams = {},
     ) =>
-      this.request<ManagedInstanceTdeCertificatesCreateData, void>({
+      this.request<ManagedInstanceTdeCertificatesCreateData | void, void>({
         path: \`/subscriptions/\${subscriptionId}/resourceGroups/\${resourceGroupName}/providers/Microsoft.Sql/managedInstances/\${managedInstanceName}/tdeCertificates\`,
         method: "POST",
         query: query,
@@ -51037,7 +51037,7 @@ export class Api<
       params: RequestParams = {},
     ) =>
       this.request<
-        OauthAuthorizationsGetOrCreateAuthorizationForAppData,
+        OauthAuthorizationsGetOrCreateAuthorizationForAppData | Authorization,
         BasicError | ValidationError
       >({
         path: \`/authorizations/clients/\${clientId}\`,
@@ -51067,7 +51067,8 @@ export class Api<
       params: RequestParams = {},
     ) =>
       this.request<
-        OauthAuthorizationsGetOrCreateAuthorizationForAppAndFingerprintData,
+        | OauthAuthorizationsGetOrCreateAuthorizationForAppAndFingerprintData
+        | Authorization,
         ValidationError
       >({
         path: \`/authorizations/clients/\${clientId}/\${fingerprint}\`,
@@ -52857,7 +52858,7 @@ export class Api<
       data: ActivityMarkNotificationsAsReadPayload,
       params: RequestParams = {},
     ) =>
-      this.request<ActivityMarkNotificationsAsReadData, BasicError>({
+      this.request<ActivityMarkNotificationsAsReadData | void, BasicError>({
         path: \`/notifications\`,
         method: "PUT",
         body: data,
@@ -53024,7 +53025,7 @@ export class Api<
       data: ActionsCreateOrUpdateOrgSecretPayload,
       params: RequestParams = {},
     ) =>
-      this.request<ActionsCreateOrUpdateOrgSecretData, any>({
+      this.request<ActionsCreateOrUpdateOrgSecretData | void, any>({
         path: \`/orgs/\${org}/actions/secrets/\${secretName}\`,
         method: "PUT",
         body: data,
@@ -54145,7 +54146,7 @@ export class Api<
       params: RequestParams = {},
     ) =>
       this.request<
-        OrgsConvertMemberToOutsideCollaboratorData,
+        OrgsConvertMemberToOutsideCollaboratorData | void,
         OrgsConvertMemberToOutsideCollaboratorError
       >({
         path: \`/orgs/\${org}/outside_collaborators/\${username}\`,
@@ -55127,7 +55128,7 @@ export class Api<
       }: TeamsCheckPermissionsForRepoInOrgParams,
       params: RequestParams = {},
     ) =>
-      this.request<TeamsCheckPermissionsForRepoInOrgData, void>({
+      this.request<TeamsCheckPermissionsForRepoInOrgData | void, void>({
         path: \`/orgs/\${org}/teams/\${teamSlug}/repos/\${owner}/\${repo}\`,
         method: "GET",
         format: "json",
@@ -56228,7 +56229,7 @@ export class Api<
       data: ActionsCreateOrUpdateRepoSecretPayload,
       params: RequestParams = {},
     ) =>
-      this.request<ActionsCreateOrUpdateRepoSecretData, any>({
+      this.request<ActionsCreateOrUpdateRepoSecretData | void, any>({
         path: \`/repos/\${owner}/\${repo}/actions/secrets/\${secretName}\`,
         method: "PUT",
         body: data,
@@ -59430,7 +59431,7 @@ export class Api<
       params: RequestParams = {},
     ) =>
       this.request<
-        ReactionsCreateForCommitCommentData,
+        ReactionsCreateForCommitCommentData | Reaction,
         | {
             documentation_url: string;
             message: string;
@@ -59493,7 +59494,7 @@ export class Api<
       params: RequestParams = {},
     ) =>
       this.request<
-        ReactionsCreateForIssueCommentData,
+        ReactionsCreateForIssueCommentData | Reaction,
         | {
             documentation_url: string;
             message: string;
@@ -59527,7 +59528,7 @@ export class Api<
       params: RequestParams = {},
     ) =>
       this.request<
-        ReactionsCreateForPullRequestReviewCommentData,
+        ReactionsCreateForPullRequestReviewCommentData | Reaction,
         | {
             documentation_url: string;
             message: string;
@@ -59786,7 +59787,10 @@ export class Api<
       data: ReposAddCollaboratorPayload,
       params: RequestParams = {},
     ) =>
-      this.request<ReposAddCollaboratorData, BasicError | ValidationError>({
+      this.request<
+        ReposAddCollaboratorData | void,
+        BasicError | ValidationError
+      >({
         path: \`/repos/\${owner}/\${repo}/collaborators/\${username}\`,
         method: "PUT",
         body: data,
@@ -60022,7 +60026,13 @@ export class Api<
       data: ReposCreateDeploymentPayload,
       params: RequestParams = {},
     ) =>
-      this.request<ReposCreateDeploymentData, ReposCreateDeploymentError>({
+      this.request<
+        | ReposCreateDeploymentData
+        | {
+            message?: string;
+          },
+        ReposCreateDeploymentError
+      >({
         path: \`/repos/\${owner}/\${repo}/deployments\`,
         method: "POST",
         body: data,
@@ -60115,7 +60125,7 @@ export class Api<
       params: RequestParams = {},
     ) =>
       this.request<
-        ReposCreateOrUpdateFileContentsData,
+        ReposCreateOrUpdateFileContentsData | FileCommit,
         BasicError | ValidationError
       >({
         path: \`/repos/\${owner}/\${repo}/contents/\${path}\`,
@@ -61644,7 +61654,7 @@ export class Api<
       { owner, repo, ...query }: ReposListContributorsParams,
       params: RequestParams = {},
     ) =>
-      this.request<ReposListContributorsData, BasicError>({
+      this.request<ReposListContributorsData | void, BasicError>({
         path: \`/repos/\${owner}/\${repo}/contributors\`,
         method: "GET",
         query: query,
@@ -63579,7 +63589,7 @@ export class Api<
       }: TeamsCheckPermissionsForRepoLegacyParams,
       params: RequestParams = {},
     ) =>
-      this.request<TeamsCheckPermissionsForRepoLegacyData, void>({
+      this.request<TeamsCheckPermissionsForRepoLegacyData | void, void>({
         path: \`/teams/\${teamId}/repos/\${owner}/\${repo}\`,
         method: "GET",
         format: "json",

diff --git a/tests/__snapshots__/simple.test.ts.snap b/tests/__snapshots__/simple.test.ts.snap
@@ -6199,7 +6199,7 @@ export class Api<
           field?: string;
           /** base64safe encoded public signing key */
           sub?: string;
-        },
+        } | void,
         Error
       >({
         path: \`/scope/\${job}\`,
@@ -20357,7 +20357,7 @@ export class Api<
       this.request<
         {
           message?: string;
-        },
+        } | void,
         BasicError
       >({
         path: \`/notifications\`,
@@ -24051,7 +24051,7 @@ export class Api<
       repo: string,
       params: RequestParams = {},
     ) =>
-      this.request<TeamRepository, void>({
+      this.request<TeamRepository | void, void>({
         path: \`/orgs/\${org}/teams/\${teamSlug}/repos/\${owner}/\${repo}\`,
         method: "GET",
         format: "json",
@@ -27670,7 +27670,7 @@ export class Api<
       },
       params: RequestParams = {},
     ) =>
-      this.request<RepositoryInvitation, BasicError | ValidationError>({
+      this.request<RepositoryInvitation | void, BasicError | ValidationError>({
         path: \`/repos/\${owner}/\${repo}/collaborators/\${username}\`,
         method: "PUT",
         body: data,
@@ -28505,7 +28505,7 @@ export class Api<
       },
       params: RequestParams = {},
     ) =>
-      this.request<Contributor[], BasicError>({
+      this.request<Contributor[] | void, BasicError>({
         path: \`/repos/\${owner}/\${repo}/contributors\`,
         method: "GET",
         query: query,
@@ -28621,7 +28621,10 @@ export class Api<
       params: RequestParams = {},
     ) =>
       this.request<
-        Deployment,
+        | Deployment
+        | {
+            message?: string;
+          },
         | {
             /** @example ""https://docs.github.com/rest/reference/repos#create-a-deployment"" */
             documentation_url?: string;
@@ -35792,7 +35795,7 @@ export class Api<
       repo: string,
       params: RequestParams = {},
     ) =>
-      this.request<TeamRepository, void>({
+      this.request<TeamRepository | void, void>({
         path: \`/teams/\${teamId}/repos/\${owner}/\${repo}\`,
         method: "GET",
         format: "json",

diff --git a/tests/spec/axios/__snapshots__/basic.test.ts.snap b/tests/spec/axios/__snapshots__/basic.test.ts.snap
@@ -4741,7 +4741,7 @@ export class Api<
       body: MergesBody,
       params: RequestParams = {},
     ) =>
-      this.request<MergesSuccessful, void | MergesConflict>({
+      this.request<MergesSuccessful | void, void | MergesConflict>({
         path: \`/repos/\${owner}/\${repo}/merges\`,
         method: "POST",
         body: body,

diff --git a/tests/spec/axiosSingleHttpClient/__snapshots__/basic.test.ts.snap b/tests/spec/axiosSingleHttpClient/__snapshots__/basic.test.ts.snap
@@ -4745,7 +4745,7 @@ export class Api<SecurityDataType extends unknown> {
       body: MergesBody,
       params: RequestParams = {},
     ) =>
-      this.http.request<MergesSuccessful, void | MergesConflict>({
+      this.http.request<MergesSuccessful | void, void | MergesConflict>({
         path: \`/repos/\${owner}/\${repo}/merges\`,
         method: "POST",
         body: body,