Crypto.com Pay API
Merchant payments API for accepting cryptocurrency payments, issuing refunds, running subscriptions and recurring invoices, managing customers, products and sub-merchants, and reading transaction histories. REST over HTTPS with HTTP Basic authentication using a secret key, test and live modes separated by key prefix, an Idempotency-Key header on the refund API, and twelve signed webhook event types verified with an HMAC-SHA256 Pay-Signature header.