API referenceWebhooksRedeliver an event

Redeliver an event

⚠️
Preview — this feature is being built; the design below is the spec.
POST https://app.syntic.ai/v1/webhooks/{webhook_id}/deliveries/{delivery_id}/redeliver

Send a past event to the endpoint again, as a new attempt with the original syntic-event-id. Use it to replay events missed while your endpoint was down. The payload is the one recorded at the time of the event.

For how this fits into a full workflow, see Webhooks.

Headers

HeaderRequiredValue
AuthorizationYesBearer <key>: a private inference key (sk_live_...). See Authentication.
syntic-betaYes, while in previewwebhooks-2026-11-01. Without it the call fails with 400 beta_required. See Versioning.

Path parameters

ParameterTypeDescription
webhook_idstringThe webhook id, starting with whk_.
delivery_idstringAny delivery of the event, starting with dlv_.

Response

202 Accepted, Content-Type: application/json

{
  "delivery_id": "dlv_01JCB9Z1B3D5F7H9K1M3",
  "event_id": "evt_01JCA5D7F9H1K3M5P7R9",
  "status": "queued"
}

Examples

curl -sS -X POST https://app.syntic.ai/v1/webhooks/whk_01JCA4C6E8G0J2L4N6Q8/deliveries/dlv_01JCB2M4P6R8T0V2X4Z6/redeliver \
  -H "Authorization: Bearer $SYNTIC_API_KEY" \
  -H "syntic-beta: webhooks-2026-11-01"

Errors

Errors use the error envelope and carry a request_id. Codes specific to this operation:

StatustypecodeWhen
400invalid_request_errorbeta_requiredThe syntic-beta header is missing.
404not_found_errorwebhook_not_foundNo webhook with that id in this workspace.
404not_found_errordelivery_not_foundUnknown delivery id, or older than the 30-day log.
401authentication_errorinvalid_api_keyThe key is missing, unknown, revoked or expired.
429rate_limit_errorrate_limitedToo many requests; wait for Retry-After. See Rate-limit headers.
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