A small, typed OpenID Connect helper for authentication and authorization.

It provides

• a framework independent async core: OIDCAuth
• framework adapters that expose common auth endpoints
• simple required() and optional() helpers to protect routes

What it does

py-oidc-auth adds OpenID Connect authentication to your Python web application. You create one auth instance at app startup, get a pre-built router (or blueprint / URL patterns), optionally add your own custom routes to it, and include it in your app. Protected routes use required() and optional() helpers.

Supported frameworks

FastAPI	Flask	Quart
Tornado	Litestar	Django

Features

• Authorization code flow with PKCE (login and callback)
• Refresh token flow
• Device authorization flow
• Userinfo lookup
• Provider initiated logout (end session) when supported
• Bearer token validation using provider JWKS, issuer, and audience
• Optional scope checks and simple claim constraints
• Full type annotation 🏷️

Install

Pick your framework for installation with pip:

python -m pip install py-oidc-auth[fastapi]
python -m pip install py-oidc-auth[flask]
python -m pip install py-oidc-auth[quart]
python -m pip install py-oidc-auth[tornado]
python -m pip install py-oidc-auth[litestar]
python -m pip install py-oidc-auth[django]

Or use conda/mamba/micromamba:

conda install -c conda-forge py-oidc-auth-fastapi
conda install -c conda-forge py-oidc-auth-flask
conda install -c conda-forge py-oidc-auth-quart
conda install -c conda-forge py-oidc-auth-tornado
conda install -c conda-forge py-oidc-auth-litestart
conda install -c conda-forge py-oidc-auth-django

Import name is py_oidc_auth:

from py_oidc_auth import OIDCAuth

Concepts

Core

OIDCAuth is the framework independent client. It loads provider metadata from the OpenID Connect discovery document, performs provider calls, and validates tokens.

Adapters

Each adapter subclasses OIDCAuth and adds:

• helpers to register the standard endpoints (router, blueprint, urlpatterns, etc.)
• required() and optional() helpers to validate bearer tokens on protected routes

Default endpoints

Adapters can expose these paths (customizable and individually disableable):

• GET /auth/v2/login
• GET /auth/v2/callback
• POST /auth/v2/token
• POST /auth/v2/device
• GET /auth/v2/logout
• GET /auth/v2/userinfo

Quick start

Create one auth instance at app startup:

auth = ...(
    client_id="my client",
    client_secret="secret",
    discovery_url="https://idp.example.org/realms/demo/.well-known/openid-configuration",
    scopes="myscope profile email",
)

FastAPI

from typing import Dict, Optional

from fastapi import FastAPI
from py_oidc_auth import FastApiOIDCAuth, IDToken

app = FastAPI()

auth = FastApiOIDCAuth(
    client_id="my client",
    client_secret="secret",
    discovery_url="https://idp.example.org/realms/demo/.well-known/openid-configuration",
    scopes="myscope profile email",
)

app.include_router(auth.create_auth_router(prefix="/api"))

@app.get("/me")
async def me(token: IDToken = auth.required()) -> Dict[str, str]:
    return {"sub": token.sub}

@app.get("/feed")
async def feed(token: Optional[IDToken] = auth.optional()> Dict[str, str]:
    if token is None:
       message = "Welcome guest"
    else:
       message = "Welcome back, {token.given_name}"
    return {"message": message}

Flask

from flask import Flask, Response, jsonify
from py_oidc_auth import FlaskOIDCAuth

app = Flask(__name__)

auth = FlaskOIDCAuth(
    client_id="my client",
    client_secret="secret",
    discovery_url="https://idp.example.org/realms/demo/.well-known/openid-configuration",
    scopes="myscope profile email",
)

app.register_blueprint(auth.create_auth_blueprint(prefix="/api"))

@app.get("/protected")
@auth.required()
def protected(token: IDToken) -> Response:
    return jsonify({"sub": token.sub})

Quart

from quart import Quart, Response, jsonify
from py_oidc_auth import QuartOIDCAuth, IDToken

app = Quart(__name__)

auth = QuartOIDCAuth(
    client_id="my client",
    client_secret="secret",
    discovery_url="https://idp.example.org/realms/demo/.well-known/openid-configuration",
    scopes="myscope profile email",
)

app.register_blueprint(auth.create_auth_blueprint(prefix="/api"))

@app.get("/protected")
@auth.required()
async def protected(token: IDToken) -> Response:
    return jsonify({"sub": token.sub})

Django

Decorator style:

from django.http import HttpRequest, JsonResponse
from django.urls import path
from py_oidc_auth import DjangoOIDCAuth, IDToken

auth = DjangoOIDCAuth(
    client_id="my client",
    client_secret="secret",
    discovery_url="https://idp.example.org/realms/demo/.well-known/openid-configuration",
    scopes="myscope profile email",
)

@auth.required()
async def protected_view(request: HttpRequest, token: IDToken) -> JsonResponse:
    return JsonResponse({"sub": token.sub})

urlpatterns = [
    *auth.get_urlpatterns(prefix="api"),
    path("protected/", protected_view),
]

Routes only:

urlpatterns = [
    *auth.get_urlpatterns(prefix="api"),
]

Tornado

import json
import tornado.web
from py_oidc_auth import TornadoOIDCAuth, IDToken

auth = TornadoOIDCAuth(
    client_id="my client",
    client_secret="secret",
    discovery_url="https://idp.example.org/realms/demo/.well-known/openid-configuration",
    scopes="myscope profile email",
)

class ProtectedHandler(tornado.web.RequestHandler):
    @auth.required()
    async def get(self, token: IDToken) -> None:
        self.write(json.dumps({"sub": token.sub}))

def make_app():
    return tornado.web.Application(
        auth.get_handlers(prefix="/api") + [
            (r"/protected", ProtectedHandler),
        ]
    )

Litestar

from typing import Dict
from litestar import Litestar, get
from py_oidc_auth import LitestarOIDCAuth

auth = LitestarOIDCAuth(
    client_id="my client",
    client_secret="secret",
    discovery_url="https://idp.example.org/realms/demo/.well-known/openid-configuration",
    scopes="myscope profile email",
)

@get("/protected")
@auth.required()
async def protected(token: IDToken) -> Dict[str, str]:
    return {"sub": token.sub}

app = Litestar(
    route_handlers=[
        protected,
        *auth.get_route_handlers(prefix="/api"),
    ]
)

Scopes and claim constraints

All adapters support:

• scopes="a b c" to require scopes on a protected endpoint
• claims={...} to enforce simple claim constraints

FastApi Example:

@auth.required(scopes="admin", claims={"groups": ["admins"]})
def admin(token: IDToken) -> Dict[str, str]:
    return {"sub": token.sub}

Related

• py-oidc-auth-client — typed Python client for authenticating against services that expose py-oidc-auth-compatible routes.

Contributing

See the CONTRIBUTING.md document to get involved.