Starter

Send an email in Postmark when an invoice is paid in Stripe

When an invoice is paid in Stripe, send an email in Postmark.

Start the 14-day trial, then find it under Templates → Library. It installs into the client you choose, switched off, with its checklist.

UsesBeta

Every step, in order

When it happens in the first app, the step runs in the second, with the client’s own account.

An invoice is paid: A Stripe invoice paid in full, within seconds. The restricted key needs Webhook Endpoints: write.
Send an email: Plain-text email from a verified sender.

Each is the client’s own, stored encrypted and never copied between clients. Until one is added the client’s checklist shows it, and nothing runs.

In the client’s Stripe dashboard: Developers → API keys → Create restricted key. Give it only what the steps need: Customers write, Payment Links write, Prices read, Invoices write, and Webhook Endpoints write for the triggers. Leave “IP access” empty: Thrum has no fixed addresses, so a key locked to IPs fails every call.
Postmark → the client’s server → API Tokens → copy the Server API token. The From address must be a confirmed sender signature or on a verified domain.

It lands switched off. The client’s checklist holds exactly this:

Connect the client’s Stripe, for “An invoice is paid”
Connect the client’s Postmark, for “Send an email”
Fill in Postmark: From (For example Northside Plumbing <hello@northside.example>)

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