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  4. OpenID Connect API
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OpenID Connect API

The OpenID Connect API provides developers with a robust solution for secure user authentication and Single Sign-On (SSO) by extending OAuth 2.0 protocols.

Developed by OpenID Foundation

Live API
99.99%Uptime
120msLatency
620Stars
OAuth2Auth
NoCredit Card
RESTStyle
1.0Version

Reference

API Endpoints

Endpoints

Available routes, request structures, and code examples.

Retrieve OpenID Connect discovery document

Endpoint URL
https://openid.net/.well-known/openid-configuration
Code Example
curl -X GET 'https://openid.net/.well-known/openid-configuration'
Expected Response
{
  "issuer": "https://example.com",
  "authorization_endpoint": "https://example.com/auth"
}
Version:v1
Limit:Unlimited

Integration

Quick Start

cURL ExampleREST
curl -X GET "https://openid.net/connect/authorize?client_id=YOUR_CLIENT_ID&response_type=code&scope=openid profile email&redirect_uri=https://yourapp.com/callback"

Docs

Technical Documentation

What this API does

The OpenID Connect API enables secure user authentication by building on OAuth 2.0 protocols with centralized identity management. It supports flexible authentication flows, including authorization code, PKCE, and implicit grants, making it suitable for web, mobile, and single-page applications. The API facilitates seamless integration with major identity providers such as Google, Microsoft, and Apple.

How it works

Developers can use the OpenID Connect API by sending HTTP requests to its RESTful endpoints for user authorization, token exchange, and user information retrieval. The API streamlines the integration of user authentication by leveraging standardized protocols, ensuring compatibility across various programming environments.

Authentication

Authentication is performed through standard OAuth 2.0 flows. Developers must obtain and manage access tokens for user sessions, typically requiring an initial authorization request to obtain the authorization code or token.

Example usage

  • /authorize - Initiates the authorization process to grant access to user information.
  • /token - Exchanges authorization codes for access tokens.
  • /userinfo - Retrieves information about the authenticated user after successful authentication.

Limits

There are no documented rate limits for the OpenID Connect API, but developers should implement measures to handle excessive requests as needed.

Ideal use cases

  • Integrating authentication in web and mobile applications.
  • Implementing Single Sign-On (SSO) across multiple platforms.
  • Managing user identities in applications requiring secure user data access.
  • Creating federated identity systems for organizations.

Examples

Real-World Applications

  • Implement Single Sign-On (SSO) for web and mobile apps
  • Enable federated identity management
  • Secure API access with token-based authentication
  • Integrate third-party identity providers like Google or Microsoft
  • Retrieve user identity information for personalization

Evaluation

Advantages & Limitations

Advantages
  • ✓ Wide compatibility with major identity providers
  • ✓ Standardized and secure authentication protocol
  • ✓ Supports multiple OAuth 2.0 grant types
  • ✓ Comprehensive and well-maintained documentation
Limitations
  • ✗ Initial setup can be complex for beginners
  • ✗ Token management requires careful security handling
  • ✗ Rate limits may impact very high-volume applications
  • ✗ Limited official SDK support compared to some proprietary solutions

Support

Frequently Asked Questions

Important Notice

Verify Before You Decide

Last verified · Apr 30, 2026

The details on this page — including pricing, features, and availability — are based on our last review and may not reflect the provider's current offering. Providers update their products frequently, sometimes without prior notice.

What may have changed

Pricing Plans
Features & Limits
Availability
Terms & Policies

Always visit the official provider website to confirm the latest pricing, terms, and feature availability before subscribing or integrating.

Check official site

External Resources

Documentation Official Website Pricing Details Postman Collection

API Specifications

1.0
Pricing Model
Free open standard; pricing depends on identity provider usage tiers
Credit Card
Not Required
Response Formats
JSON
Supported Languages
7 Languages
SDK Support
Java, JavaScript, Python
Rate Limit

1000 requests per minute

Time to Hello World

1-3 days depending on app complexity

Free Tier

Unlimited free usage for authentication and user info endpoints with standard rate limits.

Best For

Developers implementing secure federated identity and SSO solutions

Not Ideal For

Applications requiring proprietary or closed authentication systems

Tags

#open-standard#federated-identity#openid-connect#jwt#sso#oauth2#authentication

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