SumUp exposes a REST API that lets you manage checkouts, retrieve transactions and perform other operations programmatically. Before you can make requests you need to authenticate your application and, for card-present integrations, provide an Affiliate Key.
Key topics in this section:
- Authorization – explains how to obtain access tokens with API keys or OAuth 2.0.
- Affiliate Keys – learn why affiliate keys are required and how to generate one.
Once you are familiar with these concepts you can explore the detailed API reference.