These APIs are for Partners managing Merchant Collection Accounts. Merchants must be fully activated before the Account Fetch API returns data.
Endpoints
Authentication
Both endpoints authenticate via thex-api-key header. No request signing is required — API key only.
Servers
Integration Guide
For the conceptual walkthrough — lifecycle states, webhook events, and the full upload flow — see the MCA Integration Guide.MCA Overview
What MCA is, how it works, and how to integrate.
MCA Webhooks Guide
All four lifecycle events and how to handle them.

