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  4. OAuth 2.0 API
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OAuth 2.0 API

The OAuth 2.0 API offers developers a free and standardized way to implement secure access delegation for user APIs, supporting various authorization grant types.

Developed by OAuth Community / IETF

Live API
99.90%Uptime
150msLatency
3.2kStars
OAuth2Auth
NoCredit Card
RESTStyle
2.0Version

Reference

API Endpoints

Endpoints

Available routes, request structures, and code examples.

Initiate OAuth 2.0 authorization flow

Endpoint URL
https://oauth.net/authorize
Code Example
curl -X GET 'https://oauth.net/authorize'
Request Payload
{
  "client_id": "your_client_id",
  "response_type": "code"
}
Expected Response
{
  "code": "authorization_code"
}
Version:v2
Limit:Unlimited

Integration

Quick Start

cURL ExampleREST
curl -X GET "https://oauth.net/2/token"

Docs

Technical Documentation

What this API does

The OAuth 2.0 API provides a robust and secure authorization framework that enables applications to obtain limited access to user resources on a web server. Supporting multiple authorization grant types—including authorization code, client credentials, and device code—this API is designed to cater to diverse application needs ranging from web apps to mobile and IoT devices.

How it works

Developers can utilize authorization codes for direct user authorization or client credentials for server-to-server communication. The API issues access tokens that applications can use to access user resources securely, negating the need to transmit user credentials directly.

Authentication

To use the OAuth 2.0 API, you must obtain an access token through one of the supported grant types. Each token is issued after completing a specific authorization flow, ensuring that only authenticated applications can access user resources.

Example usage

  • POST /token - Exchange authorization code for an access token.
  • GET /user - Retrieve user information using the access token.
  • POST /revoke - Revoke a user's access token.

Limits

Specific rate limits for the OAuth 2.0 API are not documented. However, consult your identity provider's guidelines for token issuance limits and usage.

Ideal use cases

  • Integrating third-party services for user authentication.
  • Building mobile applications requiring secure user login.
  • Creating web apps needing access to user data from various providers.
  • Implementing IoT solutions where secure token management is paramount.

Examples

Real-World Applications

  • Secure login and authorization for web applications
  • Third-party application access delegation
  • Mobile app authentication
  • Machine-to-machine service authorization
  • Device-based authorization in IoT

Evaluation

Advantages & Limitations

Advantages
  • ✓ Widely adopted and supported by major API providers
  • ✓ Supports multiple authorization flows to fit different app needs
  • ✓ Enhances security by avoiding password sharing
  • ✓ Standardized and well-documented protocol
Limitations
  • ✗ Implementation complexity for beginners
  • ✗ Requires secure storage of access tokens
  • ✗ Token revocation and management can be challenging
  • ✗ Flow setup varies significantly by grant type

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

2.0
Pricing Model
Open standard, free to implement; pricing may apply depending on OAuth provider services.
Credit Card
Not Required
Response Formats
JSON
Supported Languages
6 Languages
SDK Support
JavaScript, Python, Java
Rate Limit

Varies by implementation, typically 1000 requests per hour

Time to Hello World

Medium (hours to a few days based on familiarity)

Free Tier

OAuth 2.0 protocol itself is free to implement; usage limits depend on the authorization server/provider.

Best For

Developers needing secure, delegated API access control

Not Ideal For

Applications requiring simple password-based authentication without token management

Tags

#access-token#api-auth#open-standard#jwt#oauth2#authentication#security#authorization

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