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For developers

The technical surface, explained in prose. The reference itself lives in the docs.

Webhooks: the reliable way to know what happened

The response to your own request is not the answer. The callback is, and treating it that way is the difference between an integration that works and one that mostly works.

2 min read

Being written

  • API keys, scopes, and what a key can never doHow keys are scoped, and the things no key is allowed to change.
  • The sandbox: building before you are verifiedA full simulation of every rail, with no real money anywhere near it.
  • Idempotency: why a retry does not pay twiceThe header that makes a timed-out payout safe to send again.