REST Request

Katalon Studio supports sending RESTful requests with parameters, body data, and authorization details needed. When sending a request, you can receive a response from the API server for examination, and troubleshooting. This section gives you detailed information on how to create, and configure a RESTful request.

Creating a RESTful Request

You can create a new RESTful request object in two ways. First, you can add a Web Service request to a New or any Existing test case directly in the object details view by a click on the plus icon.

Or select File > New > Web Service Request from the main menu.

In the New Web Service Request dialog, specify a name for your request; select RESTful in the Request Type's drop-down list; and set request URLs. Then click OK to create a request.

Specifying request details

After you've created a request successfully, double-click on the request to open its editor for adding details.

Request Method

The request method indicates the expected action to be executed on the specified resource. For REST services, Katalon Studio supports the following methods: GET, POST, PUT, DELETE, PATCH, HEAD, CONNECT, OPTIONS, and TRACE. You can refer to this document for more details, and specifications of each method.

For Katalon Studio Enterprise users, you can use custom methods added in Project Settings > Test Design > API/Web Service Method.

In Tests Explorer, there is a small icon next to the object that indicates its used method. By default, the GET method is selected for new requests.

Request URL

You need to specify a URL indicating the service endpoint of each request. For example, the following URL${status} is registered for the RESTful request we've created. In URLs, you can use variables, status=${status}, for instance, to update the Query Parameter dynamically. More details.


This table displays any parameter to be passed along with the RESTful request object. These values are generated automatically based on the Request URL or can be manually added. More details.

Starting from version 7.0, Katalon Studio encodes special characters in query parameters before sending requests.

Request Body

You can add the body information needed to be sent along with a RESTful request object. Katalon Studio supports the following body data types: text, x-www-form-urlencoded, form-data, and file.

  • Text: With this type, the supported formats include Text, JSON, XML, HTML, and Javascript.

  • Form-data: This data type allows you to send data to APIs as multipart/form-data, and attach files as well. From version 7.5.0+, you can specify the content type in the form-data body.

Request Authentication

This part is used for authenticating, and authorizing the request, which means to verify if the client is permitted to send the request, and to perform the endpoint operation.

For more details on using each type of auth, please see:

Request Headers

You can configure the header information needed for sending the RESTful request object. By default, the Content-Type value of Header is generated automatically based on the HTTP Body. You can also select headers from the list of suggested options (by double-clicking on the Name cell) or enter another header of your interest. Refer to Supported HTTP Headers for more details.

Starting from version 7.2.5, Katalon Studio supports disabling specifying the content type of HTTP Header based on HTTP Body automatically. This allows users to configure content types for HTTP Header, and Body separately.


After you send a request, Katalon Studio supports reading its response in a separate Response view. A service response comprises Status, Elapsed time, and Size fields; Body section, Header, and Verification Log.

  • Status: The status code of the response
  • Elapsed: The total time that starts from the request is sent until Katalon Studio receives the last byte of the response
  • Size: Size of the response package.

Response Body

Katalon can read a service response in JSON, XML, HTML, and JavaScript. The response body can be displayed in three formats: pretty, raw, and preview.

  • pretty: Response is displayed in a pretty format which is easier to read
  • raw: Response is displayed in the raw text without any format
  • preview: Response is displayed as visualized (e.g., If a Response is from loading a specific webpage, it is displayed as the screenshot below)

Response Header

The response's header is displayed in the Header tab:

Verification Log

This tab displays the verification results after the request is tested and verified. Refer to this document for how to verify API responses in Katalon Studio.

See also: