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OAuth 2.0

OAuth 2.0 provides secure, token-based authentication for third-party applications accessing Brevo on behalf of users.

OAuth Flow Overview

  1. Authorization Request: Redirect user to Brevo
  2. User Authorization: User grants permissions
  3. Authorization Code: Brevo redirects with code
  4. Access Token Exchange: Exchange code for tokens
  5. API Access: Use access token for requests

Authorization Endpoint 

https://app.brevo.com/oauth/authorize?
  response_type=code&
  client_id=YOUR_CLIENT_ID&
  redirect_uri=YOUR_REDIRECT_URI&
  scope=email%20contacts&
  state=random_string

Token Exchange

Terminal window
curl -X POST "https://api.brevo.com/v3/oauth/token" \
  -H "Content-Type: application/x-www-form-urlencoded" \
  -d "grant_type=authorization_code&code=AUTH_CODE&client_id=YOUR_CLIENT_ID&client_secret=YOUR_CLIENT_SECRET&redirect_uri=YOUR_REDIRECT_URI"

Access Token Usage 

const response = await fetch('https://api.brevo.com/v3/account', {
  headers: {
    'Authorization': 'Bearer YOUR_ACCESS_TOKEN',
    'Accept': 'application/json'
  }
});

Scopes

  • email: Send transactional emails
  • contacts: Manage contacts and lists
  • campaigns: Create and send campaigns
  • sms: Send SMS messages
  • webhooks: Manage webhooks

Token Refresh 

const refreshToken = async () => {
  const response = await fetch('https://api.brevo.com/v3/oauth/token', {
    method: 'POST',
    headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
    body: new URLSearchParams({
      grant_type: 'refresh_token',
      refresh_token: 'YOUR_REFRESH_TOKEN',
      client_id: 'YOUR_CLIENT_ID',
      client_secret: 'YOUR_CLIENT_SECRET'
    })
  });
  return response.json();
};