> For the complete documentation index, see [llms.txt](https://developers.newbluefx.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers.newbluefx.com/api-examples/json-command-tester.md).

# JSON Command Tester

The JSON Command Tester is built on the `scheduleCommand` function, and provides cut and paste fields to try out parameters. Once you’ve found and verified the functionality you need, you can even copy and paste from here into your own code. The JSON Command Tester can be accessed from the Data Controller column in your Captivate project panel under API Examples --> API Tour.

<figure><img src="/files/v8zJypiymrRu5m1pAhyf" alt=""><figcaption></figcaption></figure>

**Command**

Choose the command from the Command: drop down menu. Once selected, it displays information about the specific command, including details about all parameters.

This is the first parameter of the scheduleCommand() function. The second and third parameters are JavaScript objects that carry the attributes and variables for each command, respectively.

#### Parameters <a href="#parameters" id="parameters"></a>

The parameters box sets up the JavaScript object which carries all the attributes and options available for that command. To add or change values, edit directly in this.

Note that some parameters, are automatically filled in for convenience. These include the `input` name and title `id`.

#### Variables <a href="#variables" id="variables"></a>

If the particular command supports a set of variables, this displays a JavaScript object to manage the variables.

For convenience, it pre-fills the JavaScript object with all the variables of the connected title with their current values.

#### Execute Command <a href="#execute-command" id="execute-command"></a>

Once you have chosen a command and prepared the parameters and variables, click here to execute the command.

#### Returned <a href="#returned" id="returned"></a>

This displays the JavaScript object that is passed to the `scheduleCommand` callback as a JSON string.

#### Notification <a href="#notification" id="notification"></a>

Some commands, such as `subscribe` or `getSnapShot`, send JavaScript objects back later, via the `onNotify` callback (see above).


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