# iTest

Use iTest to create API requests.

On the **Sandbox** > **Tools** > **iTest** page, follow these steps:

1.  In the **Request** panel, configure the following fields:

-   **API**
-   **Product**
-   **Private Key**

![image.png](https://idocs-assets.marmot-cloud.com/storage/idocs87c36dc8dac653c1/1738830814228-072946dd-4f92-44cb-b103-e8265a700956.png)

The request body is generated automatically in the **Request body** field. If you want to customize a parameter, edit the request body.

![image.png](https://idocs-assets.marmot-cloud.com/storage/idocs87c36dc8dac653c1/1738830883521-30e87740-5205-489e-8126-528d74d663d7.png)

2.  Click **Send** to send the request. The request is signed automatically. The way the request is signed is displayed in the **Signing tutorial** tab.
3.  After the request is sent, the response message is displayed in the **Response** tab on the right side of the page.

In addition, you can test APIs locally by downloading the Postman script. For detailed instructions, see [Test APIs locally with Postman script](test_apis_locally).