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  4. Auth0 Authentication API
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Auth0 Authentication API

Auth0 Authentication API offers a production-ready solution for integrating authentication mechanisms such as social logins, SSO, and MFA into applications, suitable for developers seeking secure user management.

Developed by Auth0 (Okta)

Live API
99.99%Uptime
150msLatency
4.1kStars
OAuth2Auth
NoCredit Card
RESTStyle
v2Version

Reference

API Endpoints

Endpoints

Available routes, request structures, and code examples.

Initiate OAuth flow with Auth0

Endpoint URL
https://YOUR_DOMAIN.auth0.com/authorize
Code Example
curl -X GET 'https://YOUR_DOMAIN.auth0.com/authorize'
Request Payload
{
  "client_id": "your_client_id",
  "redirect_uri": "https://example.com/callback",
  "response_type": "code"
}
Expected Response
{
  "code": "authorization_code"
}
Version:v1
Limit:7,000 active users (free tier)

Integration

Quick Start

cURL ExampleREST
curl -X GET "https://YOUR_DOMAIN.auth0.com/oauth/token"

Docs

Technical Documentation

What this API does

The Auth0 Authentication API provides a comprehensive suite of authentication and authorization services tailored for modern web and mobile applications. It supports diverse login methods such as username/password, passwordless email or SMS, and extensive social login options including Google, Facebook, and GitHub. Integrating Single Sign-On (SSO) allows enterprises to centralize user access across multiple applications effortlessly. Multi-Factor Authentication (MFA) enhances security by requiring additional verification steps. The API adheres strictly to OAuth 2.0 and OpenID Connect standards, ensuring secure token issuance and validation with seamless SDK support for platforms like JavaScript, iOS, Android, and .NET.

How it works

To use the Auth0 API, developers send HTTP requests to various endpoints to manage authentication workflows. This includes obtaining tokens for authentication, managing user accounts, and integrating social login capabilities. It employs secure HTTPS protocols for all transactions to safeguard user data and ensure compliance with industry standards.

Developers can leverage SDKs to facilitate integration across different platforms, enabling them to customize user management flows while maintaining compliance and scalability.

Authentication

Authentication is primarily handled via API tokens. Developers must register their applications on the Auth0 dashboard to obtain a Client ID and Client Secret, used to generate access tokens for API interactions. The API supports authentication flows including authorization code flow, implicit flow, and client credentials flow, ensuring flexibility for various application needs.

Example usage

  • POST /oauth/token - Request an access token using client credentials.
  • GET /userinfo - Retrieve user profile information associated with an access token.
  • POST /dbconnections/signup - Register a new user using email/password.
  • POST /oauth/logout - Log a user out of the application.
  • GET /social/{provider}/callback - Handle callback from a social login provider.

Limits

The free plan allows for 7,500 monthly active users and unlimited logins, making it suitable for developers who are starting out or prototyping their applications. For higher usage, developers can explore premium plans.

Ideal use cases

  • Integrating authentication into web and mobile applications.
  • Implementing SSO for enterprise solutions.
  • Providing secure login options using social media accounts.
  • Enhancing security through Multi-Factor Authentication for sensitive applications.

Examples

Real-World Applications

  • Adding social login with Google, Facebook, Apple ID
  • Implementing Single Sign-On (SSO) for enterprise applications
  • Securing applications with Multi-Factor Authentication (MFA)
  • User profile management and session handling
  • Passwordless authentication using email or SMS

Evaluation

Advantages & Limitations

Advantages
  • ✓ Comprehensive authentication methods including social, SSO, MFA
  • ✓ Adheres to industry security standards OAuth 2.0 and OpenID Connect
  • ✓ Robust SDK support for all major programming languages
  • ✓ Scalable infrastructure with high uptime and low latency
Limitations
  • ✗ Can be complex to fully customize advanced authentication flows
  • ✗ Pricing can increase significantly for large user bases
  • ✗ Requires understanding OAuth/OpenID standards for optimal use
  • ✗ Limited free tier features compared to paid plans

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

v2
Pricing Model
Tiered subscription based on monthly active users
Credit Card
Not Required
Response Formats
JSON
Supported Languages
9 Languages
SDK Support
JavaScript, Node.js, Java, Swift, Android, Python, Ruby, PHP, .NET
Rate Limit

1000 requests per minute

Time to Hello World

Under 1 hour for basic integration with SDKs

Free Tier

Up to 7,500 monthly active users with unlimited logins, access to core authentication features without credit card

Best For

Startups, SMBs, enterprises needing secure, scalable authentication

Not Ideal For

Projects requiring purely offline auth or no internet connectivity

Tags

#jwt#identity#mfa#sso#oauth2#authentication#security#auth0#login

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