Client¶

Authlib provides OAuth 2.0 client implementations for two distinct use cases:

HTTP Clients — your Python code fetches tokens and calls APIs directly. Suitable for scripts, CLIs, service-to-service communication:

from authlib.integrations.requests_client import OAuth2Session

client = OAuth2Session(client_id, client_secret)
token = client.fetch_token(token_endpoint, ...)
resp = client.get('https://api.example.com/data')

Web Clients — your web application delegates authentication to an OAuth 2.0 provider. Works with any provider: well-known services (GitHub, Google…) or your own authorization server. Integrations for Flask, Django, Starlette and FastAPI:

from authlib.integrations.flask_client import OAuth

oauth = OAuth(app)
github = oauth.register('github', {...})

@app.route('/login')
def login():
    return github.authorize_redirect(url_for('authorize', _external=True))

HTTP Clients
Web Clients