Handle Memberful webhooks for subscription lifecycle events
domain: memberful.com · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Configure a webhook endpoint URL and select event types under Settings > Webhooks in the Memberful dashboard
Handle events such as subscription.created, subscription.activated, subscription.renewed, subscription.deactivated, subscription.deleted, and order.purchased/order.refunded
Parse the JSON body, which is keyed by an event field alongside the affected object (e.g. {"event":"subscription.created","subscription":{...}})
Verify the X-Memberful-Webhook-Signature header (an HMAC-SHA256 of the raw request body using the webhook secret) with a constant-time comparison
Re-fetch current state via the GraphQL API rather than trusting webhook payload freshness, since delivery order isn't guaranteed
Known gotchas
Memberful retries failed deliveries (non-2xx within 15s) with exponential backoff for up to 24 hours, then disables the endpoint and notifies the account owner
subscription.created fires for both a group plan's manager and its members — inspect the member ID in the payload to differentiate
Event naming is inconsistent across resources (e.g. member_signup vs subscription.created) per Memberful's own docs — don't assume a uniform naming scheme
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