> For the complete documentation index, see [llms.txt](https://dcgate.gitbook.io/oxipay/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dcgate.gitbook.io/oxipay/api-endpoints/sandbox-mode.md).

# Sandbox Mode

**Overview** OXI Pay provides a sandbox environment to facilitate testing of payment transactions without processing real payments. This document outlines how to use the sandbox mode when requesting a payment link.

***

**Endpoint:** `POST https://pay.oxichange.com/payment`

**Headers:**

* `X-SANDBOX: true` (Required to enable sandbox mode)

**Sandbox Mode Behavior:** When `X-SANDBOX` is set to `true`, the system generates a prefixed token (`SANDBOX-<token>`) and returns a sandbox-specific payment link:

* **Base URL:** `https://pay.oxichange.com/sandbox/invoice`
* **Payment Link:** `https://pay.oxichange.com/sandbox/invoice?token=SANDBOX-<token>`

Example Response in Sandbox Mode:

```
{
    "transaction_id": "PYD1713456789",
    "token": "SANDBOX-abcdef123456",
    "base_url": "https://pay.oxichange.com/sandbox/invoice",
    "payment_link": "https://pay.oxichange.com/sandbox/invoice?token=SANDBOX-abcdef123456"
}
```

***

**Error Codes in Sandbox Mode:**

| Status Code | Message                           | Description                                         |
| ----------- | --------------------------------- | --------------------------------------------------- |
| -1          | "Invalid Merchant ID."            | The provided Merchant ID is incorrect.              |
| -2          | "Website status is not approved." | The merchant's website is not in an approved state. |
| -3          | "Invalid currency type."          | The specified currency is not supported.            |

***

**Conclusion:** By utilizing the `X-SANDBOX` header, developers can safely test transactions in the sandbox mode before moving to production. Ensure that real transactions omit the sandbox flag for proper processing.


---

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