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Ship a payment integration in under 10 minutes

CROSS Pay REST API, SDK, and Webhook reference in one place. Server-side keys stay on the server; the browser only opens a hosted checkout.

Get started →Open the checkout with the SDKOpen API reference

First steps​

  • Getting Started — 6-step integration guide (prep → SDK choice → server → checkout → webhook → going live)
  • JavaScript SDK — open the checkout in 30 seconds with a copy-pasteable snippet
  • React SDK — wire a payment button with the provider + hook
  • Integration Guides — integration modes (Redirect / Overlay)
  • Webhooks — receive events, verify signatures, handle retries
  • API Reference — every endpoint, generated from OpenAPI 3

Architecture at a glance​

Support​

Technical questions: dev@to.nexus