The API is based on the HTTPS protocol, and the access party needs to call it through the POST method according to the API instructions.
The API responses are in JSON format, and all characters are encoded in UTF-8. The access party needs to add the request header Content-Type: application/json.
The API requests contain a token, located in the request header.
The API requests and responses are encrypted and signed. For details, see Encryption and Signature.