Introduction

Device APIs allow direct communication between terminals and Sfey Transit Payment System (TPS).

• API Specification
• Terminal registration and key management information can be found here
• Transaction processing information can be found here

General API principles

All APIs are versioned and API URL contains API's major version number.

Sfey may introduce new additional fields in the minor versions of the API. These fields are always added in a backward-compatible way. API users should ignore all unknown fields. All backward-incompatible changes are made only through new major versions only.