# Integration Options

**Request domain name.**

| Environment | Domain                                                                     |
| ----------- | -------------------------------------------------------------------------- |
| test        | [https://sbx-user-api.prepaidify.com](https://sbx-user-api.prepaidify.com) |
| product     | [https://pro-user-api.prepaidify.com](https://pro-user-api.prepaidify.com) |

**Request Header**

For each request, the request header should include the following three parameters.

| Element              | Mandatory | Data Type | Remarks                                                                                                                                                  |
| -------------------- | --------- | --------- | -------------------------------------------------------------------------------------------------------------------------------------------------------- |
| ach-access-key       | Y         | string    | Partner unique appKey, once a merchant has been on-boarded with Prepaidify, the merchant will be provided with the credentials with appKey and appSecret |
| ach-access-timestamp | Y         | string    | UTC time with 13 digit to represent time in milliseconds, expiration period is 5 minutes.                                                                |
| ach-access-sign      | Y         | string    | SHA256(timestamp + method + requestPath + body), please refer to Signature Description for more information                                              |
