API reference

The integration API. A merchant's own servers call it with an API key. This is the only surface that moves money on request, and the only one that takes an idempotency key.

You can send these requests from this page. Open an operation, choose Test Request, and put a test secret key (psg_test_…) in the Authentication panel. Requests go to https://sandbox.paysigna.com — the sandbox, against test partner credentials, where no real money moves. The live host is deliberately not offered here; see Going live.