Create a customer in Stripe when a contact joins a list in Brevo

What each client fills in

Brevo: List ID

Contacts → Lists: the number beside the list’s name.

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.

• Brevo

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

• 

  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.

After you install it

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

1. Connect the client’s Brevo, for “A contact joins a list”
2. Connect the client’s Stripe, for “Create a customer”
3. Fill in Brevo: List ID (Contacts → Lists: the number beside the list’s name)