# Parameterize UrlEncodedHttpBody in Web Service Object does not work with variables **URL:** \ **Category:** API Testing\ **Tags:** api-testing, katalon-studio\ **Created:** [April 2, 2020, 11:56am UTC](https://forum.katalon.com/t/parameterize-urlencodedhttpbody-in-web-service-object-does-not-work-with-variables/41828 "2020-04-02T11:56:48Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![ixent.gallego](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/ixent.gallego/32/11861_2.png) [@ixent.gallego](https://forum.katalon.com/u/ixent.gallego)\ **Post date:** [April 2, 2020, 11:56am UTC](https://forum.katalon.com/t/parameterize-urlencodedhttpbody-in-web-service-object-does-not-work-with-variables/41828/1 "2020-04-02T11:56:48Z")
I have seen Here: [https://docs.katalon.com/katalon-studio/docs/parameterize-a-web-service-object.html](https://docs.katalon.com/katalon-studio/docs/parameterize-a-web-service-object.html) and here: > **[REST API testing with Katalon - Mitch Valenta](https://mitch.codes/rest-api-testing-with-katalon/)** > > Katalon Background Recently, I had the opportunity of figuring out how to test a REST API using Katalon. Katalon is How to dinamically parametraze your web service objects. But none of these works with Url Encoded Body parameters… Why Not? This does not work: ![url-encoded-variables](https://europe1.discourse-cdn.com/katalon/original/2X/4/4a9d44c65ab6fbe0b1d4b656b586395ea25a01f7.png) Also, if instead of this I want to do it programatically (which is fine for me) If we look at the class HttpUrlEncodedBodyContent in the documentation: [https://docs.katalon.com/javadoc/com/kms/katalon/core/testobject/impl/HttpUrlEncodedBodyContent.html](https://docs.katalon.com/javadoc/com/kms/katalon/core/testobject/impl/HttpUrlEncodedBodyContent.html) There is **no method** to iterate through the ‘List\ parameters’… and **not even** get them. so I can’t get the body parameters of the request, modify them, and create a new HttpUrlEncodedBodyContent to set to the request. Creating the HttpUrlEncodedBodyContent from scratch every time is far from optimal, I have a template in the Object Repository as a Web Service Request, so it makes sense that I could get that request and modify it. Any way to do this? Best Regards, Ixent. ---
**Author:** ![ThanhTo](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/thanhto/32/697_2.png) [@ThanhTo](https://forum.katalon.com/u/ThanhTo)\ **Post date:** [April 2, 2020, 4:26pm UTC](https://forum.katalon.com/t/parameterize-urlencodedhttpbody-in-web-service-object-does-not-work-with-variables/41828/2 "2020-04-02T16:26:04Z")
Hi @ixent.gallego What version are you using ? My test script ```auto RequestObject to = findTestObject('Object Repository/New Request', ['variable_name' : 'my value']); println to.httpBody ``` prints ```auto variable_name=my+value ``` where variable\_name is specified as a variable with empty default value. ---
**Author:** ![ixent.gallego](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/ixent.gallego/32/11861_2.png) [@ixent.gallego](https://forum.katalon.com/u/ixent.gallego)\ **Post date:** [April 2, 2020, 6:09pm UTC](https://forum.katalon.com/t/parameterize-urlencodedhttpbody-in-web-service-object-does-not-work-with-variables/41828/3 "2020-04-02T18:09:52Z")
Hello @ThanhTo , Using Katalon Studio 7.2.6 I had this: > def request = findTestObject(‘Backend/Auth/GetToken’, [(‘username’) : username, (‘password’) : password]) as RequestObject Kept getting bad request as a response, but if I replace the values with harcoded ones in the request, it works fine. Hmmmm, that’s strange. Logging the request body (with variable replacement) this appears: grant\_type=password&client\_id=umclient&username=um\_user&password=password which seems as expected. But I get a response as if the credentials weren’t good. Anyway, removed a previous reply because the issues were not correct and was out of the scope of the main problem. The approach you showed to replace the variables, and the one I initially tried (which is also the one explained in the links) wasn’t working for some reason. But it is true that Logging the request body it appears correctly. This seems to be an issue at my side, so I’d consider this resolved. Thanks for your time, Ixent. ---
**Author:** ![az57](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/az57/32/30227_2.png) [@az57](https://forum.katalon.com/u/az57)\ **Post date:** [June 27, 2025, 12:58am UTC](https://forum.katalon.com/t/parameterize-urlencodedhttpbody-in-web-service-object-does-not-work-with-variables/41828/4 "2025-06-27T00:58:20Z")
This is the latest one while some of the methods are depreceated, just wanted to document here for anyone who is struggling like me to get this solution import com.kms.katalon.core.testobject.impl.HttpFileBodyContent import com.kms.katalon.core.testobject.impl.HttpFormDataBodyContent import com.kms.katalon.core.testobject.impl.HttpUrlEncodedBodyContent as HttpUrlEncodeBodyContent import com.kms.katalon.core.testobject.UrlEncodedBodyParameter as UrlEncodedBodyParameter RequestObject reqObj = findTestObject(‘Object Repository/XX/XX’) List nameValuePairs = new ArrayList() nameValuePairs.add(new UrlEncodedBodyParameter(“grant\_type”,GlobalVariable.API\_Grant\_Type)) nameValuePairs.add(new UrlEncodedBodyParameter(“client\_id”, GlobalVariable.API\_Client\_ID)) nameValuePairs.add(new UrlEncodedBodyParameter(“client\_secret”,GlobalVariable.API\_Client\_Secret)) nameValuePairs.add(new UrlEncodedBodyParameter(“scope”,GlobalVariable.API\_Scope)) reqObj.setBodyContent(new HttpUrlEncodeBodyContent(nameValuePairs)) //Sending the request request = WS.sendRequest(reqObj) //Verify the 200 message is displayed assert request.getStatusCode() == 200 //Getting the Response body value def slurper = new JsonSlurper() def response= slurper.parseText(request.getResponseText()) //Getting the token from the API’s response and passing on to the Global Variable def Token = response.access\_token GlobalVariable.TOKEN = “Bearer” + " " + Token println GlobalVariable.TOKEN