- Send transactional emails triggered by any StellarTools event
- Trigger Loops workflows from payment and subscription events
- Auto-sync new customers to your Loops audience and mailing lists
- View a live activity log of emails sent inside the dashboard
Supported events
The app fires on any of the following StellarTools events:| Event | When it fires |
|---|---|
customer.created | A new customer is added |
customer.updated | A customer’s details change |
customer.deleted | A customer is removed |
payment_method.created | A wallet is linked to a customer |
payment_method.deleted | A wallet is removed |
checkout.created | A checkout session is opened |
payment.pending | A payment is initiated |
payment.confirmed | A payment is confirmed on-chain |
payment.failed | A payment fails |
refund.succeeded | A refund is processed |
refund.failed | A refund attempt fails |
subscription.created | A subscription starts |
subscription.updated | A subscription changes |
subscription.canceled | A subscription is canceled |
Connect your account
- Open the Loops app from the StellarTools Marketplace.
- Enter your Loops API key. Find it at Loops → Settings → API.
- Click Connect. The app validates the key and activates.
Transactional emails
Open Notification rules in the app dashboard. For each event type, you can assign a Loops transactional email. When that event fires in StellarTools, Loops sends the matched email to the customer. Leave an event set to None to skip sending for it.Loops workflows
You can also trigger Loops workflows directly — no template selection needed. Create a workflow in Loops and set its trigger to the event name with dots replaced by underscores:| StellarTools event | Loops trigger name |
|---|---|
payment.confirmed | payment_confirmed |
subscription.created | subscription_created |
refund.succeeded | refund_succeeded |
Contact sync
Enable Contact sync to automatically add new StellarTools customers to your Loops audience whencustomer.created fires. When contact sync is on, you can also select a mailing list to subscribe them to immediately.
Toggle it off to stop syncing.
Disconnect
Click Disconnect in the top-right of the app dashboard. This removes your API key and pauses all email delivery.Examples
Payment confirmed email
Send a receipt when a customer’s payment goes through.- Create a transactional email in Loops for payment confirmations.
- In the Loops app, open Notification rules and assign it to
payment.confirmed.
Subscription welcome email
Send a welcome email when a customer starts a subscription.- Create a transactional email in Loops.
- Assign it to
subscription.createdin Notification rules.
Subscription canceled — win-back workflow
Trigger a Loops workflow to attempt to win back a customer who canceled.- Create a workflow in Loops with trigger
subscription_canceled. - Add your win-back email sequence to the workflow.
- The workflow fires automatically — no template selection needed in the app.
Failed payment alert
Notify a customer when their payment fails so they can retry.- Create a transactional email in Loops for payment failures.
- Assign it to
payment.failedin Notification rules.

