billing.tier_downgraded
The creator downgrades to a lower Subscriby tier.
When this fires
The creator switches their Subscriby subscription to a lower tier. The change lands at the end of the period they have already paid for, not at effective_at: the current phase runs to its existing end date and the lower tier begins after it.
Caveats
effective_atis stamped at emission time and is never in the future, even when the provider defers the billing change to the next renewal boundary. Do not use it to schedule feature revocation.- Tier-locked features (Teams, custom roles, etc.) may become read-only or hidden once the current paid period ends, never at
effective_at.
Related events
billing.tier_upgraded: opposite direction.billing.tier_cancelled: terminal downgrade path.
Header Parameters
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.
Request Body
application/json
The signed JSON envelope posted to your endpoint.
TypeScript Definitions
Use the request body type in TypeScript.
The envelope every event is delivered in.
Response Body
Example Requests
/billing.tier_downgradedHow is this guide?