> ## Documentation Index
> Fetch the complete documentation index at: https://doc2.payloco.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Common Request

* Last Updated: 2022-01-16 21:31:02

## Common Request Parameters

| Parameter   | Type   | Description                                                    | Example                       | Required |
| :---------- | :----- | :------------------------------------------------------------- | :---------------------------- | :------- |
| charset     | string | Encoding of the interaction data【utf-8】                        | utf-8                         | Yes      |
| version     | string | API version, current version is【2.0.0】, only 2.0.0 is accepted | 2.0.0                         | Yes      |
| requestTime | string | Request time                                                   | 2024-05-24T14:29:32.682+08:00 | Yes      |
| signType    | string | Message signature type: RSA                                    | RSA                           | Yes      |
| keyVersion  | string | Key version: 1                                                 | 1                             | Yes      |
| memberId    | string | Institution ID                                                 | 1000000000001                 | No       |
| merchantId  | string | Merchant ID                                                    | 2001000000002036              | Yes      |