Add or update a contact in Brevo when a customer pays (checkout or payment link) in Stripe

What each client fills in

Nothing. It needs only the accounts it connects to.

The accounts it needs

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.

• Brevo

  In the client’s Brevo: account menu → SMTP & API → API Keys → Generate a new API key.

After you install it

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

1. Connect the client’s Stripe, for “A customer pays (checkout or payment link)”
2. Connect the client’s Brevo, for “Add or update a contact”