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

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 annotations

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 with 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-litestar
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:

a method to create a router / blueprint / URL patterns with built-in auth endpoints
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

Adding custom routes#

The router returned by the adapter is a standard framework object. You can add your own endpoints to it before including it in your app. This is useful for exposing application-specific auth metadata alongside the standard OIDC endpoints, for example valid redirect ports for client discovery.

Quick start#

Create one auth instance at app startup, get the router, optionally add custom routes to it, and include it in your app:

FastAPI

from typing import Dict, List, 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",
    audience="my-aud",
)

# Get the router and add custom endpoints
auth_router = auth.create_auth_router(prefix="/api")

@auth_router.get("/auth/v2/auth-ports")
async def auth_ports() -> Dict[str, List[int]]:
    return {"valid_ports": [8080, 8443]}

app.include_router(auth_router)

@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]:
    return {"authenticated": token is not None}

Flask

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

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",
    audience="my-aud",
)

# Get the blueprint and add custom endpoints
auth_bp = auth.create_auth_blueprint(prefix="/api")

@auth_bp.route("/auth/v2/auth-ports")
def auth_ports() -> Response:
    return jsonify({"valid_ports": [8080, 8443]})

app.register_blueprint(auth_bp)

@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",
    audience="my-aud",
)

# Get the blueprint and add custom endpoints
auth_bp = auth.create_auth_blueprint(prefix="/api")

@auth_bp.route("/auth/v2/auth-ports")
async def auth_ports() -> Response:
    return jsonify({"valid_ports": [8080, 8443]})

app.register_blueprint(auth_bp)

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

Django

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",
    audience="my-aud",
)

# Custom endpoint alongside the standard OIDC routes
async def auth_ports(request: HttpRequest) -> JsonResponse:
    return JsonResponse({"valid_ports": [8080, 8443]})

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

urlpatterns = [
    \*auth.get_urlpatterns(),
    path("auth/v2/auth-ports", auth_ports),
    path("protected/", protected_view),
]

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",
     audience="my-aud",
)

# Custom handler alongside the standard OIDC routes
class AuthPortsHandler(tornado.web.RequestHandler):
    def get(self) -> None:
        self.write(json.dumps({"valid_ports": [8080, 8443]}))

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_auth_routes(prefix="/api"),
            (r"/api/auth/v2/auth-ports", AuthPortsHandler),
            (r"/protected", ProtectedHandler),
        ]
    )

Litestar

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

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",
     audience="my-aud",
)

@get("/auth/v2/auth-ports")
async def auth_ports() -> Dict[str, List[int]]:
    return {"valid_ports": [8080, 8443]}

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

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

Scopes audience and claim constraints#

All adapters support:

scopes="a b c" to require scopes on a protected endpoint
claims={...} to enforce simple claim constraints
audience=my-aud to enforce intended audience check

FastAPI Example:

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

Documentation#

Contents