generated: '2026-10-03'
method: searched
generator: extract-docs-artifacts.py (local)
source: https://platform.claude.com/docs/en/managed-agents/webhooks
sources:
- https://platform.claude.com/docs/en/managed-agents/webhooks
- https://developers.googleblog.com/deliver-asynchronous-notifications-in-google-chat-using-webhooks/
- https://platform.claude.com/docs/en/managed-agents/events-and-streaming
- https://developers.google.com/community
description: Google Managed Agents webhook event surface as documented on the Claude Platform.
events:
- event: session.status_run_started
  description: Agent execution started; triggers at every session status transition to running.
- event: session.status_idled
  description: Agent awaiting input, for example, a tool permission approval or a new user message.
- event: session.budget_reached
  description: The session reached its budget and paused; fires at most once for each budget value you set.
- event: session.status_rescheduled
  description: A transient error occurred and the session is retrying automatically.
- event: session.status_terminated
  description: The session terminated, either because of an unrecoverable error or because it was archived.
- event: session.thread_created
  description: 'New multi‑agent thread opened: an additional agent called by the coordinator is starting work, or the session''s advisor is being
    consulted.'
- event: session.thread_idled
  description: An agent in a multi‑agent interaction is waiting for input.
- event: session.thread_terminated
  description: A multi‑agent thread terminated, either because the thread was archived or because it exhausted its retries.
- event: session.outcome_evaluation_ended
  description: Outcome evaluation for a single iteration completed.
- event: session.updated
  description: Session properties changed (for example, its name or configuration was updated).
- event: session.deleted
  description: Session permanently deleted; there is no object left to fetch, so treat the event itself as final.
delivery:
  signature: Each delivery includes the headers webhook-id, webhook-timestamp, and webhook-signature; a 32‑byte whsec_‑prefixed signing secret
    is generated at endpoint creation and used to verify the signature.
  retries: Anthropic makes up to three delivery attempts per event with jittered exponential backoff between 5 and 120 seconds; after the final
    failed attempt the event is dropped.
docs: https://platform.claude.com/docs/en/managed-agents/webhooks