> For the complete documentation index, see [llms.txt](https://developer.payfirma.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.payfirma.com/api.md).

# API

- [Authorization](https://developer.payfirma.com/api/authorization.md)
- [Customer](https://developer.payfirma.com/api/customer.md)
- [Plan](https://developer.payfirma.com/api/plan.md)
- [Transaction](https://developer.payfirma.com/api/transaction.md)
- [Invoice](https://developer.payfirma.com/api/invoice.md)
- [Card Terminal](https://developer.payfirma.com/api/card-terminal.md)
- [EFT](https://developer.payfirma.com/api/eft.md)