Notify customers on WhatsApp when Stripe payment succeeds with MoltFlow

How it works

Stripe fires a checkout.session.completed webhook when a payment succeeds Customer name, phone, email, and payment amount are extracted If the customer has a phone number, a WhatsApp receipt is sent via MoltFlow Payments without phone numbers are logged and skipped

Set up steps (~5 min)

Create a MoltFlow account at molt.waiflow.app and connect your WhatsApp Generate an API key in MoltFlow (Sessions page > API Keys tab) Activate this workflow and copy the webhook URL In Stripe Dashboard > Developers > Webhooks, add the n8n URL for checkout.session.completed Set YOUR_SESSION_ID in the Format Receipt code node Add your MoltFlow API Key as Header Auth credential (header name: X-API-Key)

Prerequisites

MoltFlow account with active WhatsApp session Stripe account with webhook access Customer phone numbers collected during checkout (Stripe customer_details.phone)