Auth0 Connector

Connect Auth0 to Brevo through Tajo to sync authenticated user profiles as marketing contacts, trigger automations based on authentication events, and enrich your customer data with identity and access management insights.

Overview

Property	Value
Platform	Auth0 (by Okta)
Category	Identity & Access (Custom)
Setup Complexity	Medium
Official Integration	No
Data Synced	Users, Events, Roles, Identities
Auth Method	Machine-to-Machine OAuth 2.0

Features

User profile sync - Sync Auth0 user profiles to Brevo contacts
Authentication events - Trigger automations on login, signup, and password reset
Role-based segmentation - Segment contacts based on Auth0 roles and permissions
Social identity data - Enrich contacts with social login profile information
Login activity tracking - Track last login, login count, and device data
Multi-tenant support - Sync users across multiple Auth0 tenants

Prerequisites

Before you begin, ensure you have:

An Auth0 account with API access
A Machine-to-Machine application registered in Auth0
Management API permissions granted to the M2M application
A Brevo account with API access
A Tajo account with connector permissions

Authentication

Machine-to-Machine OAuth 2.0

# Create an M2M application in Auth0 Dashboard
export AUTH0_DOMAIN=your-tenant.auth0.com
export AUTH0_CLIENT_ID=your_client_id
export AUTH0_CLIENT_SECRET=your_client_secret
export AUTH0_AUDIENCE=https://your-tenant.auth0.com/api/v2/

// Get Management API access token
const tokenResponse = await fetch(
  `https://${process.env.AUTH0_DOMAIN}/oauth/token`,
  {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      client_id: process.env.AUTH0_CLIENT_ID,
      client_secret: process.env.AUTH0_CLIENT_SECRET,
      audience: process.env.AUTH0_AUDIENCE,
      grant_type: 'client_credentials'
    })
  }
);

const { access_token } = await tokenResponse.json();
// Token is valid for 24 hours by default

API Permissions

Grant only required scopes to your M2M application: read:users, read:user_idp_tokens, read:roles, and read:logs. Avoid granting write permissions unless needed.

Configuration

Basic Setup

connectors:
  auth0:
    enabled: true
    domain: "${AUTH0_DOMAIN}"
    client_id: "${AUTH0_CLIENT_ID}"
    client_secret: "${AUTH0_CLIENT_SECRET}"
    audience: "https://${AUTH0_DOMAIN}/api/v2/"

    sync:
      users: true
      events: true
      roles: true
      schedule: "0 */4 * * *"  # Every 4 hours

    lists:
      all_users: 20
      verified_users: 21
      social_login: 22

Field Mapping

field_mapping:
  email: email
  given_name: FIRSTNAME
  family_name: LASTNAME
  nickname: NICKNAME
  picture: AVATAR_URL
  email_verified: EMAIL_VERIFIED
  logins_count: LOGIN_COUNT
  last_login: LAST_LOGIN_DATE
  created_at: SIGNUP_DATE
  user_metadata.phone: SMS
  user_metadata.company: COMPANY
  app_metadata.plan: SUBSCRIPTION_PLAN
  app_metadata.role: USER_ROLE

API Endpoints

Endpoint	Method	Description
`https://{domain}/api/v2/users`	GET	List or search users
`https://{domain}/api/v2/users/{id}`	GET	Get a user
`https://{domain}/api/v2/users/{id}`	PATCH	Update user metadata
`https://{domain}/api/v2/users/{id}/roles`	GET	Get user roles
`https://{domain}/api/v2/roles`	GET	List all roles
`https://{domain}/api/v2/logs`	GET	Get log events
`https://{domain}/api/v2/stats/active-users`	GET	Get active users count
`https://{domain}/api/v2/stats/daily`	GET	Get daily stats
`https://{domain}/oauth/token`	POST	Get access token

Code Examples

Initialize Connector

import { TajoClient } from '@tajo/sdk';

const tajo = new TajoClient({
  apiKey: process.env.TAJO_API_KEY,
  brevoApiKey: process.env.BREVO_API_KEY
});

await tajo.connectors.connect('auth0', {
  domain: process.env.AUTH0_DOMAIN,
  clientId: process.env.AUTH0_CLIENT_ID,
  clientSecret: process.env.AUTH0_CLIENT_SECRET
});

Sync Users to Brevo

// Paginate through Auth0 users
let page = 0;
const perPage = 50;
let hasMore = true;

while (hasMore) {
  const response = await fetch(
    `https://${domain}/api/v2/users?` +
      new URLSearchParams({
        page: page.toString(),
        per_page: perPage.toString(),
        include_totals: 'true',
        search_engine: 'v3',
        q: 'email_verified:true'
      }),
    {
      headers: { 'Authorization': `Bearer ${accessToken}` }
    }
  );

  const { users, total } = await response.json();

  for (const user of users) {
    await tajo.contacts.sync({
      email: user.email,
      attributes: {
        FIRSTNAME: user.given_name,
        LASTNAME: user.family_name,
        LOGIN_COUNT: user.logins_count,
        LAST_LOGIN_DATE: user.last_login,
        SIGNUP_DATE: user.created_at,
        EMAIL_VERIFIED: user.email_verified
      },
      listIds: [20]
    });
  }

  page++;
  hasMore = (page * perPage) < total;
}

Track Authentication Events via Log Streams

// Set up Auth0 Log Stream webhook
// Configure in Auth0 Dashboard > Monitoring > Streams

app.post('/webhooks/auth0', async (req, res) => {
  // Verify authorization header
  const authHeader = req.headers.authorization;
  if (authHeader !== `Bearer ${process.env.AUTH0_WEBHOOK_TOKEN}`) {
    return res.status(401).send('Unauthorized');
  }

  const logs = req.body;

  for (const log of logs) {
    switch (log.data.type) {
      case 's':   // Successful login
        await tajo.events.track({
          email: log.data.details.email,
          event: 'user_login',
          properties: {
            ip: log.data.ip,
            user_agent: log.data.user_agent,
            connection: log.data.connection
          }
        });
        break;
      case 'ss':  // Successful signup
        await tajo.contacts.sync({
          email: log.data.details.email,
          attributes: { SIGNUP_DATE: log.data.date },
          listIds: [20]
        });
        break;
      case 'sp':  // Successful password change
        await tajo.events.track({
          email: log.data.details.email,
          event: 'password_changed'
        });
        break;
    }
  }

  res.status(200).send('OK');
});

Role-Based Segmentation

// Sync user roles for segmentation
const rolesResponse = await fetch(
  `https://${domain}/api/v2/users/${userId}/roles`,
  {
    headers: { 'Authorization': `Bearer ${accessToken}` }
  }
);

const roles = await rolesResponse.json();
const roleNames = roles.map(r => r.name).join(', ');

await tajo.contacts.update(userEmail, {
  attributes: {
    USER_ROLE: roleNames,
    IS_ADMIN: roles.some(r => r.name === 'admin')
  }
});

Rate Limits

Endpoint Category	Limit	Notes
Management API	50 req/sec (Free)	Per tenant
Management API	100 req/sec (Paid)	Per tenant
Authentication API	Varies	Based on plan
Log Streams	Real-time	No rate limit on delivery
Pagination	50 items/page max	Use `page` and `per_page` params

Pagination Required

Auth0 Management API returns a maximum of 50 results per page. Always implement pagination using the page and per_page parameters. Include include_totals=true to get the total count.

Troubleshooting

Issue	Cause	Solution
401 Unauthorized	Token expired	Request new M2M token (24h expiry)
403 Forbidden	Missing scopes	Grant required permissions to M2M app
Empty user list	Search query error	Use Lucene query syntax for v3 engine
Missing metadata	Metadata not set	Check user_metadata and app_metadata
Rate limit 429	Too many requests	Implement backoff with retry headers

Debug Mode

connectors:
  auth0:
    debug: true
    log_level: verbose
    log_sync: true

Best Practices

Use Log Streams - Real-time event streaming instead of polling the Logs API
Implement pagination - Always paginate user list queries for large tenants
Cache M2M tokens - Reuse tokens until near expiry (24h default lifetime)
Use search engine v3 - Use Lucene query syntax for efficient user searches
Sync verified users only - Filter on email_verified:true to avoid unverified contacts
Leverage user metadata - Store custom attributes in Auth0 user_metadata for sync

Security

Machine-to-Machine OAuth - Client credentials grant for server-to-server auth
Scoped permissions - Grant minimum required Management API scopes
Token rotation - M2M tokens expire after 24 hours by default
Log Stream auth - Use bearer token verification for webhook endpoints
Tenant isolation - Separate configurations per Auth0 tenant
Encrypted transport - TLS 1.2+ for all API communications

Open-Source Implementation Map

No official open-source repository was found in the current Tajo connector catalog for Auth0. Keep this page focused on the verified public API contract and vendor documentation until an official schema, SDK, MCP server, or public integration repository is available.

Tajo Revamp Checklist

Verify authentication and scope requirements against the vendor documentation before each connector release.
Document primary sync objects, external IDs, pagination strategy, and rate limits explicitly.
Add smoke tests from public API examples rather than undocumented behavior.
Capture webhook signature verification and replay protection when the vendor supports webhooks.
Record gaps where no official public repository or schema exists so future maintainers know what still needs source-backed validation.