plan.* events

Active plan flipped inactive.

When this fires

A plan is taken off sale through the REST API (POST /v1/projects/{project}/plans/{plan}/unpublish) or the publish_plan MCP tool; automatically when a pass series runs its last date; or when the free-plan entitlement sweep disables an unentitled zero-priced plan. The plan remains visible to existing subscribers and stays in the catalog, but new checkouts cannot select it. Deactivating from the creator dashboard does not emit this event.

The two shapes are disjoint. The publish-state path sends data.plan and nothing else; an automatically retired series sends the five flat keys and no data.plan object. Branch on whether data.plan or data.plan_id is present before reading any other field.

Caveats

  • Existing subscriptions on the plan are unaffected and continue to renew until cancelled or expired.
  • For permanent removal use plan.deleted.

Related events

  • plan.activated: paired transition.
  • plan.deleted: terminal state.
postWebhookplan.deactivated

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'plan.deactivated' required

The event name, always plan.deactivated 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.