I have encountered an issue while creating a cookie in the backend, which I will later use to send a request from the frontend. Both apps are on the same domain. This is the general idea behind it: https://levelup.gitconnected.com/secure-frontend-authorization-67ae11953723. Frontend - Sending GET request to Backend using Python requests @app.get('/') async def homepage(request: Request, response_class=HTMLResponse): keycloak_code = 'sksdkssdk' data = {'code': keycloak_code} url_post = 'http://127.0.0.1:8002/keycloak_code' post_token=requests.get(url=url_post, json = data ) return 'Sent' if __name__ == '__main__': uvicorn.run(app, host='local.me.me', port=7999,debug=True) Backend - FastAPI endpoints @app.get("/keycloak_code") def get_tokens(response: Response, data: dict): code = data['code'] print(code) .... requests.get(url='http://local.me.me:8002/set') return True @app.get("/set") async def createcookie(response: Response): r=response.set_cookie(key='tokic3', value='helloworld', httponly=True) return True if __name__ == '__main__': uvicorn.run(app, host='local.me.me', port=8002, log_level="debug") When I open the browser and access http://local.me.me:8002/set, I can see that the cookie is created. But when I make a GET request from my frontend to backend to the same URL, the request is received—as I can see in the terminal—but the backend does not create the cookie. Does anyone know what I might be doing wrong? I have tried different implementations from FastAPI docs, but none has similar use cases. Continue reading...