Adfin API
Invoicing, payments and credit-control API — customers, invoices, payment requests, direct-debit mandates, payments and signed webhooks.
Documentation
Documentation
https://developer.adfin.com/docs/welcome
APIReference
https://developer.adfin.com/reference/welcome-1
GettingStarted
https://developer.adfin.com/products/direct-integration/guides/get-started/1_get-access
Authentication
https://raw.githubusercontent.com/api-evangelist/adfin/refs/heads/main/authentication/adfin-authentication.yml