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Event webhooks notify your own systems the moment something happens to a pass — for example when a customer adds their pass to a wallet, or taps it at a terminal. You subscribe an endpoint once, and Stell sends it a small JSON message for each event; delivery, retries, and signing are handled for you. Event webhooks card on the program page Two event types are available:
  • Pass status changed — fires each time a pass moves between lifecycle states. The most common use is detecting enrollment: when a customer adds their pass to Apple Wallet or Google Wallet, the pass goes from PREACTIVE to ACTIVE, and that change fires the webhook.
  • Transaction created — fires when a transaction is recorded against a pass, for example an NFC tap at a terminal.
Subscriptions belong to a program. If you run several programs and want the same events from each, create a subscription on each program — the same endpoint URL works fine, and every delivery says which program it came from.

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Before you start

  • An HTTPS endpoint that can receive POST requests. The URL must be public — plain HTTP, localhost, and private network addresses are rejected.
  • Which events you need. For enrollment notifications, Pass status changed is enough.
  • Your endpoint’s credentials, if it requires them — for example a bearer token to send in an Authorization header.
This page covers setting up the subscription in the portal. Give whoever builds the receiving endpoint the webhook deliveries reference — it documents the exact requests Stell sends.

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Create a subscription

  1. Open your program and find the Event webhooks card.
  2. Click Configure — or Manage, if the program already has subscriptions — then Add subscription.
  3. Give it a Name that says where the events go, for example “Loyalty CRM sync”, and optionally a Description.
  4. Enter the Webhook URL — the HTTPS endpoint that receives the deliveries.
  5. Under Signing secret, click Generate, then Copy. Sharing this secret with your endpoint lets it verify that deliveries really come from Stell — optional, but recommended.
  6. Tick the Event types the endpoint should receive. The Example payload panel next to the form shows exactly what your endpoint gets for each selected type.
  7. Leave Active on.
  8. If your endpoint requires authentication, add it under Custom Headers — see below.
  9. Click Create subscription.
Create event subscription dialog
Treat the signing secret like a password: store it with your endpoint’s configuration and share it only through a secure channel — never email or chat. You can copy it again later from the edit dialog, and Regenerate replaces it — after regenerating, update your endpoint or its signature checks will start failing.

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Custom headers

Custom headers are sent with every delivery — typically your endpoint’s authentication. Click Add Header and pick a preset:
  • Authorization — for token auth; enter the value your endpoint expects, for example Bearer your-token-here.
  • X-API-Key — for endpoints keyed by API key.
  • Custom — any header of your own, as long as its name starts with X-.
Only Authorization and X-* headers are allowed. Headers without a value aren’t saved, and if two headers share a name, only the last value is kept.

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Manage subscriptions

Open Manage on the Event webhooks card to see the program’s subscriptions — each shows its name, event types, and an Active or Inactive badge.
  • Edit — change anything about the subscription: name, URL, events, secret, headers. The program it belongs to can’t be changed; create a subscription on the other program instead.
  • Pause — turn off the Active switch in the edit dialog. Deliveries stop, but the configuration is kept for when you switch it back on.
  • Delete — stops all event deliveries to the endpoint permanently. This can’t be undone.

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Test your webhook

There’s no test button — verify with a real pass instead, which also proves the whole chain:
  1. Issue a pass in the subscribed program, with your own details.
  2. Add it to your wallet.
  3. Adding the pass activates it — that status change fires the webhook within moments. Check that your endpoint received the delivery.
Nothing fires when a pass is merely issued — the first Pass status changed delivery comes when the customer adds it to a wallet. A pass that’s never added sends nothing.

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If deliveries don’t arrive

  • Right program? The most common miss: the pass belongs to a different program than the one with the subscription.
  • Subscription Active, with the right event type ticked?
  • Did a subscribed event actually happen? A status change or a transaction — issuing a pass alone doesn’t fire anything.
  • Does your endpoint answer with a 2xx status? Failed deliveries are retried twice within seconds, then dropped — see retries.
  • Expecting a header that isn’t arriving? Only Authorization and X-* custom headers are sent; anything else was dropped when the subscription was saved.
Still stuck? Contact support — they can check the delivery attempts for your subscription.