FastAPI middleware for mocking response data of non-implemented endpoints.

Mock data is generated in accordance with endpoint return type or provided response_model using polifactory.

For more information on how to use fastapi-mock-middleware, please refer to the official documentation.

pip install fastapi-mock-middleware

Add MockAPIMiddleware middleware to app and raise APINotImplementedError in your endpoint stubs.

import uvicorn from fastapi import FastAPI from pydantic import BaseModel from fastapi_mock_middleware import MockAPIMiddleware, APINotImplementedError app = FastAPI() app.add_middleware(MockAPIMiddleware) class Item(BaseModel): id: int name: str @app.get('/') async def list_items() -> list[Item]: raise APINotImplementedError() if __name__ == '__main__': uvicorn.run('example:app', reload=True)

Check the response using curl.

curl http://127.0.0.1:8000/

Called API must return mocked data:

[ { "id": 5392, "name": "gVzyVVUmGGevXlQvXGBW" } ]