Test webhook subscription

Subscription identifier (UUID).

Optional client-generated request identifier (UUID recommended) for end-to-end tracing.

Axiym echoes it in the X-Request-Id response header and records it in logs. Quote it when contacting support. If omitted, Axiym generates one.

Unique client-generated key for safely retrying a funds-moving request. A UUID is recommended, but any unique string is accepted.

Repeating the same request with the same key returns the original result instead of creating a duplicate withdrawal or confirmation.