Pass a response filter key in a REST call made from a widget

Once you have created a response filter via the REST API, you can pass its key in the data a widget sends along with a REST request.

The server uses the key to locate the correct response filter and then returns data accordingly. The simplest way to include a response filter key is to hard code it in the REST call, for example:

data["filterKey"] = "my-filter-key";

 ccRestClient.request(url, data,
       this.successFunc.bind(this),
       this.errorFunc.bind(this));

Commerce also provides a mechanism for programmatically determining the response filter key to pass in a REST call, allowing you to avoid hard coding it into the widget itself. This mechanism is described in Programmatically determine the correct response filter key.