Get Merchant UID
Merchant UID is the unique merchant identity assigned by the platform. It is used in x-merchant-uid and callback payloads.
API Overview
This documentation explains the API rules, signature rules, and callback format for merchant integration. We recommend reading it once before joint testing.
The main page keeps common core APIs and callback notes. The AI integration guide provides the core OpenAPI list for generating system integration code with AI.
Use API Key
The API Key beginning with mch_ in the merchant API settings is used for request authentication and can be used as the signing secret.
Pass notifyUrl
When creating pay-in or payout orders, pass the merchant-owned notifyUrl in the request body. Later callbacks are delivered to that order-level URL.