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

# Request

API request parameters are categorized into two parts:

* **System Parameters**: Parameters that are necessary for every API call.
* **Specific Parameters**: Parameters specific to individual API calls or endpoints.

### System Parameters

| Parameter | Type   | Description                                                                                                                                          | Example                          | Required |
| --------- | ------ | ---------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------- | -------- |
| timestamp | long   | Current request timestamp in milliseconds                                                                                                            | 1687846491667                    | yes      |
| nonce     | string | A 6-character random string                                                                                                                          | 24abxo                           | yes      |
| sign      | string | The digital signature of the request to prevent illegal tampering. Refer to the [Signature](/api-reference/signature) section for the signing rules. | eb881023045a167d3e4a7378bc212f53 | yes      |

### Functional Parameters

Apart from the three parameters above, other parameters are Functional Parameters. Below is a request example.

## Request Example

### Client

**Using Postman as an example:** 

<img src="https://mintcdn.com/eg/eb7TqKKrnkBKfAwg/images/requestDemo.png?fit=max&auto=format&n=eb7TqKKrnkBKfAwg&q=85&s=05dcfd7962aabcf8999bbd8a0b12c99b" width="2748" height="1593" data-path="images/requestDemo.png" />

### curl

```
curl --location --request POST 'https://xx.xx.xx/api/v1/payout' \
--header 'Content-Type: application/json' \
--data-raw '{
    "pid": 1394705669275648,
    "currency": "195@195",
    "address": "TXsmKpEuW7qWnXzJLGP9eDLvWPR2GRn1FS",
    "amount": "0.1",
    "remark": "payout",
    "third_party_id": "1828fc39daaf4d318777e1211c055edf",
    "callback_url": "http://xxx.com/payout/callback",
    "nonce": "rR7ngZ",
    "timestamp": 1709708726668,
    "sign": "e95ba1a7e9bcadb92d9c3405a932715d"
}'
```