member.* events

A trial converts to a paying subscription.

When this fires

A trial subscription successfully converts to a paying subscription: the subscription reaches active while the subscriber was previously in trialing status. Fires exactly once per conversion.

This event is currently emitted for Stripe only. Trials taken through PayPal, Paystack, Razorpay, Skrill, CeyPay, or CoinPayments do not produce a conversion event; detect those by watching payment.succeeded against a subscription you know began in trial.

Caveats

  • Pairs with payment.succeeded for the converting charge. subscription.activated does not fire at conversion; it already fired when the trialing subscription was first created.
  • A subscriber who churns and starts a new trial later does not re-emit member.converted for the prior trial; each trial-conversion is its own bounded event.

Related events

  • member.trial_joined: predecessor.
  • subscription.activated: fired earlier, when the trialing subscription was created; it does not repeat at conversion.
postWebhookmember.converted

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'member.converted' required

The event name, always member.converted 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.