Auth0 Authentication API

Name: Auth0 Authentication API API
Brand: Auth0 Authentication API
Availability: InStock

★ Only Publicly Available OpenAPI DocumentIdentity AuthAuthenticationbearer21 EndpointsREST

For Agents

Authenticate users via OAuth 2.0 and OpenID Connect, initiate passwordless login flows, and handle MFA challenges across Auth0 tenants.

Quickstart

Get started with Auth0 Authentication API in minutes using your preferred integration method.

# Add to your MCP client config (Claude Desktop, Cursor, Windsurf)
{
  "jentic": {
    "url": "https://api.jentic.com/mcp",
    "auth": "oauth"
  }
}

# Then ask your agent:
"authenticate a user with OAuth 2.0"

# → Jentic returns the GET /events tool with parameter schema, agent executes.

Capabilities

What an agent can do with Auth0 Authentication API API.

Issue OAuth 2.0 access tokens and refresh tokens for applications and APIs

Initiate passwordless login via email or SMS one-time codes

Challenge and verify multi-factor authentication enrollments

GET STARTED

Start building with Auth0 Authentication API API

Explore with Jentic

View OpenAPI Document

Use Cases

Patterns agents use Auth0 Authentication API API for, with concrete tasks.

★ AI Agent Authentication Integration

AI agents authenticate users and obtain scoped access tokens through Auth0's OAuth 2.0 token endpoint. Agents search for the token retrieval operation via Jentic, load the required schema (client_id, client_secret, grant_type, audience), and execute the /oauth/token call to receive a JWT access token. The entire flow completes in under a minute without manual credential configuration.

Request an access token using client_credentials grant type with audience set to the target API identifier and verify the returned JWT contains the expected scopes

Passwordless Email Login

Implement passwordless authentication by sending users a one-time code or magic link via email. Auth0's /passwordless/start endpoint initiates the flow and /passwordless/verify completes it. Supports customizable email templates and works across web and mobile clients without requiring users to remember passwords.

Call /passwordless/start with connection 'email' and send 'code' to a user's email address, then verify the code via /passwordless/verify

Multi-Factor Authentication Enrollment

Add a second authentication factor to user accounts by enrolling authenticator apps, SMS, or push notification methods. The /mfa/associate endpoint links a new factor to the user, and /mfa/challenge triggers verification during login. Supports TOTP, SMS, and Auth0 Guardian push notifications.

Associate a TOTP authenticator with a user via /mfa/associate and then issue a challenge via /mfa/challenge to verify the enrollment

User Signup and Password Management

Register new users to Auth0 database connections via /dbconnections/signup with email, password, and optional metadata. Trigger password reset flows via /dbconnections/change_password that send reset emails to users. Both endpoints work with Auth0's universal login or can be embedded directly in custom applications.

Create a new user via /dbconnections/signup with email, password, and connection name, then trigger a password change email via /dbconnections/change_password

Token Lifecycle Management

Control active sessions by revoking refresh tokens via /oauth/revoke and retrieving token metadata through the introspection flow. Agents can terminate compromised sessions immediately and verify token validity before granting resource access. Supports both application-level and per-user token revocation.

Revoke a specific refresh token via POST /oauth/revoke with the token value and client credentials, then confirm the token is no longer valid

Key Endpoints

21 endpoints — jentic publishes the only available openapi specification for auth0 authentication api, keeping it validated and agent-ready.

METHOD

PATH

DESCRIPTION

POST

/oauth/token

Exchange credentials for access and refresh tokens

GET

/authorize

Initiate OAuth 2.0 authorization flow

POST

/dbconnections/signup

POST

/passwordless/start

Start a passwordless login via email or SMS

POST

/mfa/challenge

Trigger an MFA challenge for verification

POST

/oauth/revoke

Revoke an issued refresh token

GET

/userinfo

Retrieve authenticated user profile

GET

/.well-known/jwks.json

Fetch public keys for JWT verification

POST

/oauth/token

Exchange credentials for access and refresh tokens

GET

/authorize

Initiate OAuth 2.0 authorization flow

POST

/dbconnections/signup

POST

/passwordless/start

Start a passwordless login via email or SMS

POST

/mfa/challenge

Trigger an MFA challenge for verification

Why though Jentic?

Three things that make agents converge on Jentic-routed access.

Credential isolation

Auth0 client credentials (client_id and client_secret) are stored encrypted in the Jentic vault (MAXsystem). Agents receive scoped JWT access tokens — raw secrets never enter the agent's context window.

Intent-based discovery

Agents search by intent (e.g., 'authenticate user with passwordless email') and Jentic returns matching Auth0 operations with their input schemas, so the agent can call /passwordless/start without reading documentation.

Time to first call

Direct Auth0 integration: 1-3 days for OAuth flow setup, error handling, and token refresh logic. Through Jentic: under 1 hour — search, load schema, execute.

Related APIs

Alternatives and complements available in the Jentic catalogue.

Alternative

Okta Admin Management API

Full identity platform with user lifecycle, directory, and policy management beyond authentication

Choose Okta when you need comprehensive user directory management, group policies, and application provisioning in addition to authentication flows

Alternative

FusionAuth API

Self-hosted identity platform with similar OAuth/SAML support and no per-user pricing

Choose FusionAuth when the requirement is self-hosted authentication with no per-user costs and full data sovereignty

Alternative

Clerk Backend API

Developer-first auth with pre-built UI components and session management for modern web apps

Choose Clerk when the application needs pre-built UI components for sign-in/sign-up and session management with minimal backend configuration

Alternative

Stytch API

API-first authentication with passwordless methods and fraud prevention built in

Choose Stytch when passwordless-first authentication with device fingerprinting and fraud signals is the primary requirement

FAQs

Specific to using Auth0 Authentication API API through Jentic.

Why is there no official OpenAPI spec for Auth0 Authentication API?

Auth0 does not publish an OpenAPI specification. Jentic generates and maintains this spec so that AI agents and developers can call Auth0 Authentication API via structured tooling. It is validated against the live API and kept up to date. Get started at https://app.jentic.com/sign-up.

What authentication does the Auth0 Authentication API use?

The Auth0 Authentication API uses JWT bearer tokens obtained from the /oauth/token endpoint. You provide client_id and client_secret (for machine-to-machine) or authorization codes (for user flows) to receive a signed JWT. Through Jentic, these credentials are stored in the MAXsystem vault and agents receive scoped tokens without handling raw secrets.

Can I initiate passwordless login with the Auth0 Authentication API?

Yes. POST to /passwordless/start with your client_id, connection set to 'email' or 'sms', and the recipient address. Auth0 sends a one-time code or magic link. Verify completion with /passwordless/verify by submitting the code. Through Jentic, search for 'start passwordless login' to load the operation schema and execute directly.

What are the rate limits for the Auth0 Authentication API?

Auth0 enforces per-tenant rate limits: the /oauth/token endpoint allows up to 300 requests per minute on free plans and higher on paid tiers. The /passwordless/start endpoint is limited to 50 emails per hour per IP. Exceeding limits returns HTTP 429 with a Retry-After header indicating when to retry.

How do I enroll MFA authenticators through the Auth0 Authentication API via Jentic?

Search Jentic for 'enroll mfa authenticator' to find the /mfa/associate operation. The schema requires an access token with the enroll scope, an authenticator_types array (e.g. ['otp']), and returns a secret and barcode_uri for TOTP setup. After enrollment, trigger /mfa/challenge during login to prompt the user for their code.

Does the Auth0 Authentication API support device authorization flow?

Yes. POST to /oauth/device/code with your client_id and scope to receive a device_code and user_code. Display the user_code to the user on the input-constrained device, then poll /oauth/token with grant_type 'urn:ietf:params:oauth:grant-type:device_code' until the user approves and a token is issued.

Can I retrieve SAML metadata from the Auth0 Authentication API?

Yes. GET /samlp/metadata/{client_id} returns the SAML 2.0 SP metadata XML for a specific application. This includes the entity ID, assertion consumer service URL, and signing certificate. Use this to configure SAML federation with enterprise identity providers without manual XML construction.