📚 Documentation - 🚀 Getting Started - 💬 Feedback

Documentation

• Examples - examples for your different use cases.
• Docs Site - explore our docs site and learn more about Auth0.

Getting Started

• 1. Features
• 2. Installation
• 3. Setup
  • Minimal Setup
  • Advanced
• 4. Routes
  • Protecting Routes

1. Features

• Fully Integrated Auth Flows: Automatic routes for /auth/login, /auth/logout, /auth/callback, etc.
• Session-Based: Uses secure cookies to store user sessions, either stateless (all data in cookie) or stateful (data in a database).
• Account Linking: Optional routes for linking multiple social or username/password accounts into a single Auth0 profile.
• Backchannel Logout: Receive logout tokens from Auth0 to invalidate sessions server-side.
• Extensible: Swap in your own store implementations or tune existing ones (cookie name, expiration, etc.)

2. Installation

Requirements: Python 3.9+ and FastAPI. A typical production environment also requires HTTPS so that secure cookies (secure=True) can be sent.

pip install auth0-fastapi

If you’re using Poetry:

poetry install auth0-fastapi

3. Setup

Minimal

# main.py
import os
import uvicorn
from fastapi import FastAPI, Depends, Request, Response
from starlette.middleware.sessions import SessionMiddleware

from auth0_fastapi.config import Auth0Config
from auth0_fastapi.auth.auth_client import AuthClient
from auth0_fastapi.server.routes import router, register_auth_routes
from auth0_fastapi.errors import register_exception_handlers

app = FastAPI(title="Auth0-FastAPI Example")

# 1) Add Session Middleware, needed if you're storing data in (or rely on) session cookies
app.add_middleware(SessionMiddleware, secret_key="YOUR_SESSION_SECRET")

# 2) Create an Auth0Config with your Auth0 credentials & app settings
config = Auth0Config(
    domain="YOUR_AUTH0_DOMAIN",          # e.g., "dev-1234abcd.us.auth0.com"
    client_id="YOUR_CLIENT_ID",
    client_secret="YOUR_CLIENT_SECRET",
    app_base_url="http://localhost:3000",  # or your production URL
    secret="YOUR_SESSION_SECRET"
)

# 3) Instantiate the AuthClient
auth_client = AuthClient(config)

# Attach to the FastAPI app state so internal routes can access it
app.state.config = config
app.state.auth_client = auth_client

# 4) Conditionally register routes
register_auth_routes(router, config)

# 5) Include the SDK’s default routes
app.include_router(router)


@app.get("/")
def home():
    return {"message": "Hello, Auth0-FastAPI!"}

if __name__ == "__main__":
    uvicorn.run(app, host="0.0.0.0", port=3000)

Auth0 Dashboard Configurations

• The AUTH0_DOMAIN, AUTH0_CLIENT_ID, and AUTH0_CLIENT_SECRET can be obtained from the Auth0 Dashboard once you've created an application. This application must be a Regular Web Application.

• The SESSION_SECRET is the key used to encrypt the session and transaction cookies. You can generate a secret using openssl:

openssl rand -hex 64

• The APP_BASE_URL is the URL that your application is running on. When developing locally, this is most commonly http://localhost:3000.

Important

You will need to register the following URLs in your Auth0 Application via the Auth0 Dashboard:

• Add http://localhost:3000/auth/callback to the list of Allowed Callback URLs
• Add http://localhost:3000 to the list of Allowed Logout URLs

Advanced

If you need more control over session management, transaction cookies, or additional settings, here’s a more extensive setup.

Customizing the Cookie Stores

By default, the SDK creates:

• A stateless state store: keeps session data encrypted directly in the cookie, or you can switch to a Stateful store (backed by Redis or another database).
• A cookie transaction store: for short-lived transaction data.

To tweak these stores - to change cookie names or expiration dates - or to use a custom store, simply instantiate your store and pass it to AuthClient:

# main.py
import os
import uvicorn
from fastapi import FastAPI, Depends, Request, Response
from starlette.middleware.sessions import SessionMiddleware

from auth0_fastapi.config import Auth0Config
from auth0_fastapi.auth.auth_client import AuthClient
from auth0_fastapi.server.routes import router, register_auth_routes
from auth0_fastapi.errors import register_exception_handlers

app = FastAPI(title="Auth0 FastAPI Example")

# 1) Add Session Middleware, needed if you're storing data in (or rely on) session cookies
app.add_middleware(SessionMiddleware, secret_key=os.environ.get("SESSION_SECRET"))

# 2) Create an Auth0Config with your Auth0 credentials & app settings
config = Auth0Config(
    domain="YOUR_AUTH0_DOMAIN",          # e.g., "dev-1234abcd.us.auth0.com"
    client_id="YOUR_CLIENT_ID",
    client_secret="YOUR_CLIENT_SECRET",
    app_base_url="http://localhost:3000",  # or your production URL
    secret="YOUR_SESSION_SECRET",
)

# 3) Instantiate the AuthClient
auth_client = AuthClient(config)

# Attach to the FastAPI app state so internal routes can access it
app.state.config = config
app.state.auth_client = auth_client

# 4) Conditionally register routes
register_auth_routes(router, config)

# 5) Include the SDK’s default routes
app.include_router(router)

4. Routes

The SDK for Web Applications mounts 4 main routes:

1. /auth/login: the login route that the user will be redirected to to initiate an authentication transaction
2. /auth/logout: the logout route that must be added to your Auth0 application's Allowed Logout URLs
3. /auth/callback: the callback route that must be added to your Auth0 application's Allowed Callback URLs
4. /auth/backchannel-logout: the route that will receive a logout_token when a configured Back-Channel Logout initiator occurs

To disable this behavior, you can set the mount_routes option to False (it's True by default):

config = Auth0Config(
    domain="YOUR_AUTH0_DOMAIN",    
    client_id="YOUR_CLIENT_ID",
    client_secret="YOUR_CLIENT_SECRET",
    app_base_url="http://localhost:3000",
    secret="YOUR_SESSION_SECRET",
    mount_routes=False,
)

Additionally, by setting mount_connect_routes to True (it's False by default) the SDK also can also mount 4 routes useful for account-linking:

1. /auth/connect: the route that the user will be redirected to to initiate account linking
2. /auth/connect/callback: the callback route for account linking that must be added to your Auth0 application's Allowed Callback URLs
3. /auth/unconnect: the route that the user will be redirected to to initiate account linking
4. /auth/unconnect/callback: the callback route for account linking that must be added to your Auth0 application's Allowed Callback URLs

Protecting Routes

In order to protect a FastAPI route, you can use the SDK's get_session() method and pass it through Depends:

from fastapi import Depends, Request, Response, HTTPException, status
from auth0_fastapi.config import Auth0Config
from auth0_fastapi.auth.auth_client import AuthClient


config = Auth0Config(
    domain="YOUR_AUTH0_DOMAIN",            # e.g., "dev-1234abcd.us.auth0.com"
    client_id="YOUR_CLIENT_ID",
    client_secret="YOUR_CLIENT_SECRET",
    app_base_url="http://localhost:3000",  # or your production URL
    secret="YOUR_SESSION_SECRET",
    authorization_params={
        "scope": "openid profile",         # required get the user information from Auth0
    }
)

auth_client = AuthClient(config)


@app.get("/profile")
async def profile(request: Request, response: Response, session=Depends(auth_client.require_session)):
    store_options = {"request": request, "response": response}
    user = await auth_client.client.get_user(store_options=store_options)
    if not user:
        return {"error": "User not authenticated"}
    
    return {
        "message": "Your Profile",
        "user": user,
        "session_details": session
    }

Important

The above is to protect server-side rendering routes by the means of a session, and not API routes using a bearer token. The authorization_params passing the scope is used in to retrieve the user information from Auth0. Can be omitted if you don't need the user information.

Requesting an Access Token to call an API

If you need to call an API on behalf of the user, you want to specify the audience parameter when registering the plugin. This will make the SDK request an access token for the specified audience when the user logs in.

config = Auth0Config(
    domain="YOUR_AUTH0_DOMAIN",    
    client_id="YOUR_CLIENT_ID",
    client_secret="YOUR_CLIENT_SECRET",
    app_base_url="http://localhost:3000",
    secret="YOUR_SESSION_SECRET"
    auhorization_params= {
      "audience": "YOUR_AUDIENCE"
    }
)

The AUTH0_AUDIENCE is the identifier of the API you want to call. You can find this in the APIs section of the Auth0 Dashboard.

Feedback

Contributing

We appreciate feedback and contribution to this repo! Before you get started, please read the following:

• Auth0's general contribution guidelines
• Auth0's code of conduct guidelines
• This repo's contribution guide

Raise an issue

To provide feedback or report a bug, please raise an issue on our issue tracker.

Vulnerability Reporting

Please do not report security vulnerabilities on the public GitHub issue tracker. The Responsible Disclosure Program details the procedure for disclosing security issues.

What is Auth0?

Auth0 is an easy to implement, adaptable authentication and authorization platform. To learn more checkout Why Auth0?

This project is licensed under the MIT license. See the LICENSE file for more info.