Webhooks
Webhooks let your application receive real-time notifications when events happen in Synapse -- email delivered, link clicked, contact updated, and more.
Subscribing
Register webhook endpoints and configure which events you want to receive.
Event Types & Payloads
Complete reference of all webhook event types and their payload schemas.
Signature Verification
Verify webhook signatures to ensure payloads are authentic and untampered.
Retry & Delivery
How webhook delivery retries work, timeout handling, and failure recovery.