Guides#

Task-oriented walkthroughs of the S2S CARD API. Each one takes a single job end to end - the request, every response it can return, the callback that settles it, and the mistakes that cost people time.

Start with Take a payment even if your first job is a refund or a payout. It establishes the request shape, the four synchronous responses and the callback contract that every other guide assumes.

If you have not made a call yet, the quickstart goes from credentials to a verified callback in about fifteen minutes.

Every guide prints worked requests, responses and callbacks with reproducible signatures. Any hash on these pages can be recomputed from the inputs shown.

Technical questions go to [email protected].