generated: '2026-09-09'
method: searched
source: openapi/transcriptfetch-api-v2-openapi.json (VideoRequest.callback_url and job envelopes) and https://transcriptfetch.com/docs/endpoints
note: >-
  No AsyncAPI document and no subscription event bus is published — the event surface is
  a single per-request result callback, captured here honestly rather than fabricated
  into an AsyncAPI. Recorded as type Webhooks.
webhooks:
- name: transcript-job-result
  direction: outbound (provider POSTs to the consumer)
  trigger: >-
    A transcript request that escalates to AI audio transcription (HTTP 202 with
    job_id/poll_url) finishes or fails, when the request supplied callback_url instead
    of polling.
  register_via: callback_url field (uri, max 2000 chars, must be public https) on POST /api/v2/transcripts/video and batch entries
  delivery:
    method: POST
    success_body: '{ ok, status, job_id, data }'
    failure_body: '{ ok, status, job_id, error }'
    note: A trimmed envelope without the usage and request_id fields the poll URL adds.
  security:
    signature_header: 'X-TranscriptFetch-Signature: sha256=<hex>'
    scheme: HMAC-SHA256 over the exact body bytes, when a signing secret is configured on the provider side.
events:
- transcript_job.completed
- transcript_job.failed