> ## 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.

# Check address existence

> Query the address is the Cregis Address.

### API URL

POST /api/v1/address/inner

Check if the address belongs to the corresponding project. After create the address deposit, you can validate the returned address information to prevent the address from being tampered with.

### Request

#### Request Parameters

| Name      | Type           | Required | Description               |
| --------- | -------------- | -------- | ------------------------- |
| pid       | integer(int64) | true     | Project ID                |
| address   | string         | true     | Address                   |
| chain\_id | string         | true     | Chain ID                  |
| nonce     | string         | true     | 6-character random string |
| timestamp | integer(int64) | true     | Timestamp                 |
| sign      | string         | true     | Signature                 |

###### Request Example

```json theme={null}
{
    "pid": 1382528827416576,
    "address": "TXsmKpEuW7qWnXzJLGP9eDLvWPR2GRn1FS",
    "chain_id": "195",
    "nonce": "tvccuh",
    "timestamp": 1687849472174,
    "sign": "48036043999446485fe0d20a838a00dc"
}
```

### Response

#### Response Result

| Name | Type   | Description          |
| ---- | ------ | -------------------- |
| code | string | Response code        |
| msg  | string | Response message     |
| data | object | Response data object |

#### Response `data` Object

| Name   | Type    | Description                                                                              |
| ------ | ------- | ---------------------------------------------------------------------------------------- |
| result | boolean | <p>true: Address is within the project<br />false: Address is not within the project</p> |

###### Response Example

```json theme={null}
{
  "code": "00000",
  "msg": "ok",
  "data": {
    "result": false
  }
}
```