billing.* events

The creator cancels their Subscriby subscription.

When this fires

The creator cancels their Subscriby tier subscription. The account remains usable until the current period ends.

This event has two distinct payload shapes depending on which side initiated the cancellation. Branch on the presence of effective_at versus subscription_id.

Caveats

  • Expect this event twice for a single cancellation. The dashboard shape fires when the creator cancels; the provider shape fires later, when the period actually ends and the provider deletes the subscription. De-duplicate on data.creator_id if you only want to act once.
  • Cancellation does not refund the active period; there is a no-refunds policy on creator tier billing.
  • The account does not auto-lock at effective_at unless past_due conditions also apply; it gracefully drops to the Free tier feature set.

Related events

  • billing.tier_downgraded: alternative path that retains paid features.
  • billing.invoice_paid: last paid invoice before cancellation.
postWebhookbilling.tier_cancelled

Headers

SB-Signaturestring required

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=.

SB-Event-Idstring required

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.

SB-Event-Namestring required

The event name, the same as the envelope's type.

Content-Typestring required

Always application/json.

User-Agentstring required

Always Subscriby-Webhooks/1.0.

Payload

idstring required

A ULID unique to the event, prefixed evt_. Every retry carries the same id, so it is the key to deduplicate on.

type'billing.tier_cancelled' required

The event name, always billing.tier_cancelled here.

created_atstring date-time required

When the event was emitted, server time, ISO 8601.

api_versionstring required

The contract version of the payload shape, 2026-05-01 today. A breaking change to a shape ships under a new version.

project_idstring uuid nullable required

The project the event belongs to; null for team-scoped and billing events.

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.