Oxin Pay API
REST API for accepting crypto payments across 11 blockchains.
Base URL: https://pay.oxinchain.io
Get started
5-Minute Quickstart
Get your first invoice created in minutes
Authentication
API keys, IP whitelist, HMAC signing
Invoices
Create, retrieve, list, cancel payments
Webhooks
Real-time event notifications
Error Reference
Complete error code listing
Rate Limits
Per-endpoint limits and headers
Integration Guide
Complete guide: all patterns, 5 languages, security, FAQ
Supported chains
BTCETHBSCPolygonSolanaTronBaseArbitrumCoreXRPOxin