The creator pointed a resource at a replacement channel or group: in a recovery after a ban, or on demand for a healthy resource.
When this fires
The creator swaps a resource onto another chat: a replacement channel after a ban, the standby in one click, or a healthy resource moved to a new supergroup on demand (Swap & Grant, which spends no allowance). The resource is re-pointed, the old links revoked and every active member's re-admission queued. One event per resource swapped, each under the operation_id of the recovery absorbing it.
Caveats
- A swap onto the standby chat also fires recovery.standby_removed with reason: used.
- project.resource.updated fires for the same resource with changes.space_id, as it does for any swap.
Related events
- recovery.resource_failed_over: the same swap made by the platform.
- recovery.operation_reverted: the swap put back inside the window.
Headers
t=<unix seconds>,v1=<hex>: the HMAC-SHA256 of "<t>.<raw body>" under the endpoint's secret. Verify it before acting, and refuse a t more than 300 seconds from now. During a secret rotation a v0= signature under the previous secret may precede v1=.
The event's ULID, bare. The envelope's id is the same ULID prefixed evt_, so strip the prefix before comparing. Deduplicate on it: a retry carries the same id.
The event name, the same as the envelope's type.
Always application/json.
Always Subscriby-Webhooks/1.0.
Payload
Response
Your endpoint acknowledged the delivery. Any 2xx status within 30 seconds marks it delivered; the response body is ignored.
Changes
Webhooks have no change history: a webhook is keyed by its event name rather than a path and method, so no recorded change can name it.