Syndicate Webhooks

generated: '2026-07-21'
method: searched
source: https://tc.docs.syndicate.io/infrastructure/webhooks
type: Webhooks
spec_type: none
note: >-
  Syndicate documents a webhook service but publishes no AsyncAPI document, so
  this artifact captures the webhook catalog (type Webhooks) rather than an
  AsyncAPI spec. NEVER fabricated — the shapes below are taken verbatim from the
  webhooks docs.
subscription:
  note: >-
    A single API call subscribes to all transaction status updates for a
    project; webhooks reconcile on-chain and off-chain sources for accuracy and
    are designed for reliability (faster than traditional indexers).
signing:
  header: Syndicate-Signature
  algorithm: HMAC-SHA256
  secret: per-endpoint signing secret
  format: 't=<unix_ms>,s=<hex_hmac>'
  example: 'syndicate-signature: t=823230245000,s=e212625c3ee9a48f940aab506f8c65915f4512fa0da46bc960878eb413d024b7'
  replay_protection: reject events whose timestamp is older than 5 minutes
  signed_payload_note: >-
    HMAC is computed over the JSON body plus an appended triggeredAt field,
    with keys in alphabetical order.
envelope:
  fields:
    data: CallbackInformation (event-specific object)
    eventType: EventType
    messageId: UUID
    triggeredAt: unix timestamp (ms, added for signature computation)
events:
- type: TransactionStatusChange
  description: >-
    Emitted when a transaction request changes status (e.g. PENDING, SUBMITTED,
    PROCESSED, CONFIRMED). Lets apps re-render, push notifications, or trigger
    background jobs as soon as a transaction is confirmed on-chain.