@@ -277,6 +277,14 @@ const app = createApp().get("/path", {}, ({ set }) => {
 
 > As of right now, you can't add custom status codes to the OpenAPI docs or as apart of the response schema. The OpenAPI spec will always show `200 OK` as the response.
 
+By default, Zeta will show `application/json` as the content type in the OpenAPI docs. you can override this by setting the `contentType` metadata on your schema:
+
+```ts
+app.get("/csv", {
+  response: z.string().meta({ contentType: "text/csv" })
+}, () => "...")
+```
+
 ## Life Cycle Hooks
 
 You can use any of the following APIs to hook into the request lifecycle:
 
@@ -95,6 +95,14 @@ const app = createApp({
 
       return entry;
     },
+  )
+
+  .get(
+    "/api/csv",
+    {
+      response: z.string().meta({ contentType: "text/csv" }),
+    },
+    () => "test",
   );
 
 console.log(
 
@@ -40,4 +40,8 @@ export const zodSchemaAdapter: SchemaAdapter = {
       }),
     );
   },
+  getResponseContentType: (schema: any) => {
+    const meta = z.globalRegistry.get(schema);
+    return meta?.contentType ?? meta?.["content-type"];
+  },
 };
@@ -62,9 +62,10 @@ export function buildOpenApiDocs(
           requestBody: body
             ? {
                 content: {
-                  "application/json": {
-                    schema: adapter.toJsonSchema(body),
-                  },
+                  [adapter.getResponseContentType(body) ?? "application/json"]:
+                    {
+                      schema: adapter.toJsonSchema(body),
+                    },
                 },
               }
             : undefined,
@@ -78,7 +79,8 @@ export function buildOpenApiDocs(
               200: {
                 description: "OK",
                 content: {
-                  "application/json": {
+                  [adapter.getResponseContentType(response) ??
+                  "application/json"]: {
                     schema: adapter.toJsonSchema(response),
                   },
                 },
 
@@ -956,6 +956,7 @@ export interface SchemaAdapter {
     schema: StandardSchemaV1;
     description?: string;
   }>;
+  getResponseContentType: (schema: StandardSchemaV1) => string | undefined;
 }
 
 //
Original file line number	Diff line number	Diff line change
`@@ -956,6 +956,7 @@ export interface SchemaAdapter {`
`956`	`956`	`schema: StandardSchemaV1;`
`957`	`957`	`description?: string;`
`958`	`958`	`}>;`
	`959`	`+ getResponseContentType: (schema: StandardSchemaV1) => string \| undefined;`
`959`	`960`	`}`
`960`	`961`
`961`	`962`	`//`