Coin OpenAPI

Coin OpenAPICurrency Exchange & Withdrawal

Integrate exchange quotes, FX orders, receive accounts, and withdrawals with ES256-signed requests.

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API Reference
Testing Guide

  • Common Protocol

    Shared request/response conventions, auth headers, and Digest rules for all /coin/v1/* endpoints.

  • Request Signing

    SHA-256 Digest + ECDSA ES256 (P-256) signatures with replay protection.

  • Exchange & Withdraw

    Quote → confirm → query for FX; receive-account → calc fee → withdraw → query for payouts.

  • Sandbox Ready

    Test domain, test merchant keys, and a sign self-check endpoint to validate your integration.