Track users and custom events in Braze and trigger a campaign via the REST API

Steps

1. Identify your Braze REST endpoint (e.g., https://rest.iad-01.braze.com) — this is cluster-specific and found in the Braze dashboard under Settings > APIs and Identifiers.
2. Track user attributes by POSTing to {endpoint}/users/track with Authorization: Bearer {API_KEY} and a JSON body containing an attributes array, each item with an external_id and the custom or standard attributes to set.
3. Log custom events in the same call or separately by including an events array in the /users/track payload, each item with external_id, name (event name), and time (ISO 8601).
4. To trigger an API-triggered campaign, first create the campaign in the Braze dashboard with delivery type 'API-triggered', then send it via POST {endpoint}/campaigns/trigger/send with campaign_id and a recipients array.
5. For transactional or Canvas flows, use {endpoint}/canvas/trigger/send similarly with a canvas_id to trigger a specific Canvas entry.