OAuth 2.1 Authentication
for |.
Industry-standard authentication protocol for AI agents and websites.
The same OAuth flow used by Google, GitHub, and Microsoft—now optimized for AI agents.
No credit card required • Production-ready OAuth 2.1 + OIDC
What is Auth-Agent?
Auth-Agent is a complete OAuth 2.1 + OIDC implementation designed for AI agents. It enables AI agents to securely authenticate with websites using the Authorization Code Flow with PKCE—the same standard used by major platforms like Google, GitHub, and Slack.
OAuth 2.1
Latest OAuth specification with mandatory PKCE, enhanced security, and simplified flow
OIDC Compliant
OpenID Connect with ID tokens, UserInfo endpoint, and discovery document
Production-Ready
Rate limiting, token refresh, security headers, and comprehensive error handling
For AI Agents
Authenticate with any website using our Python SDK
OAuth 2.1 + PKCE
Our Python SDK implements the complete OAuth 2.1 Authorization Code Flow with PKCE (Proof Key for Code Exchange). It automatically handles PKCE generation, state validation, token exchange, and token refresh—everything you need for secure authentication.
- Automatic PKCE generation (SHA-256)
- Token refresh with rotation
- OIDC UserInfo endpoint support
- Challenge-based polling flow
from auth_agent import AgentSDK
# Initialize SDK
sdk = AgentSDK(agent_id="your_agent_id")
# Start OAuth flow (generates PKCE automatically)
auth_url = sdk.get_authorization_url(
redirect_uri="https://yourapp.com/callback",
scope="openid profile email agent"
)
print("Open:", auth_url)
# After user approves, exchange code
tokens = sdk.exchange_code(code, state, redirect_uri)
# Make authenticated requests
user_info = sdk.get_user_info()
print(f"Logged in as: {user_info['agent_name']}")
# SDK auto-refreshes expired tokensFor Websites
Add "Login with AI Agent" using standard OAuth 2.1
// PKCE Generation
async function generatePKCE() {
const verifier = base64UrlEncode(
crypto.getRandomValues(new Uint8Array(32))
);
const challenge = base64UrlEncode(
await crypto.subtle.digest('SHA-256',
new TextEncoder().encode(verifier))
);
return { verifier, challenge };
}
// Start OAuth Flow
async function startOAuth() {
const { verifier, challenge } = await generatePKCE();
const state = crypto.randomUUID();
sessionStorage.setItem('oauth_state', state);
sessionStorage.setItem('code_verifier', verifier);
const params = new URLSearchParams({
response_type: 'code',
client_id: 'YOUR_CLIENT_ID',
redirect_uri: window.location.origin + '/callback',
scope: 'openid profile email agent',
state: state,
code_challenge: challenge,
code_challenge_method: 'S256'
});
window.location.href =
`https://auth-agent.com/authorize?${params}`;
}Standard OAuth 2.1 Integration
If you've integrated Google Sign-In or GitHub OAuth, you already know how to use Auth-Agent. It's the exact same Authorization Code Flow with PKCE that you're familiar with—no proprietary protocols or custom implementations.
- Standard OAuth 2.1 endpoints
- OIDC discovery document
- JWT ID tokens with agent claims
- Token introspection endpoint
OAuth 2.1 Authorization Code Flow
AI Agent
Python SDK
Auth-Agent
OAuth 2.1 Server
Website
OAuth Client
PKCE Protection
Prevents code interception
State Validation
CSRF protection
JWT Tokens
Secure & stateless
Why OAuth 2.1?
Industry Standard
Same protocol as Google, GitHub, and Microsoft. No proprietary implementations.
PKCE Mandatory
Proof Key for Code Exchange prevents authorization code interception attacks.
OIDC Support
ID tokens with JWT, UserInfo endpoint, and OpenID Connect discovery.
Ready to Get Started?
Join thousands of developers using Auth-Agent for secure AI agent authentication
Free tier available • No setup fees • Production-ready infrastructure