Develop for Payments Acceptance Service Create invoices and receive online payments from customers with the Sage Payments Acceptance Service. Visit website Documentation What is Payments Acceptance Service? Payments Acceptance Service lets you create invoices and take customer payments. Find out more. Get started Learn how to get started with Payments Acceptance Service and the Provider API. API reference Explore our API reference and read the descriptions of resources exposed via our APIs. Apply & set up Find out if the Provider API meets your needs, and how to register. Develop & test Learn about what you need to do to connect to and use our API. Go live & support Find out more about the go-live process and technical support. Guides Take a look at our guides to help you through some common use cases.