Coinepay OpenAPI

Coinepay OpenAPIVirtual Card Integration Docs

HMAC auth · Async card issuance · Webhook delivery · 5 SDK languages

HMAC-SHA256 Auth

4 request headers, double-replay protection (timestamp + nonce), enumeration-resistant by design.

Read the spec

Async Webhooks

6 event types, HMAC-signed payloads, exponential backoff (6 attempts) + dead-letter queue.

Integrate webhooks

LLM-Friendly

Auto-generated llms.txt index + llms-full.txt at build time. Drop into ChatGPT/Claude/Cursor.

View llms.txt