MUWE OpenAPI

MUWE OpenAPI is the partner-facing payment API for merchant digitization in Mexico.

The first documentation set covers the core Upay-compatible payment flow:

• API request format and signing.
• Terminal identity and key usage.
• Transaction creation with barcode payment and QR pre-create.
• Query, refund, cancel, and revoke lifecycle operations.

Use this documentation as the integration contract for bank, processor, and acquiring partners.

Base URL

https://vsi-api.shouqianba.com

Production MUWE endpoints may use a market-specific host. The API path and request signing model stay stable unless a versioned contract says otherwise.

Integration Model

1. Activate or check in the terminal to obtain terminal_sn and terminal_key.
2. Build UTF-8 JSON request bodies.
3. Sign each request body with the terminal key.
4. Submit transaction requests.
5. Query uncertain transactions until a final order status is reached.