# How to verify API responses in Katalon Studio

**URL:** <https://forum.katalon.com/t/how-to-verify-api-responses-in-katalon-studio/16806>\
**Category:** Miscellaneous\
**Created:** [January 4, 2019, 11:37am UTC](https://forum.katalon.com/t/how-to-verify-api-responses-in-katalon-studio/16806 "2019-01-04T11:37:42Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![system](https://europe1.discourse-cdn.com/katalon/original/3X/d/5/d55596ab02785a255798e87ede769734747b30c4.svg) [@system](https://forum.katalon.com/u/system)\
**Post date:** [January 4, 2019, 11:37am UTC](https://forum.katalon.com/t/how-to-verify-api-responses-in-katalon-studio/16806/1 "2019-01-04T11:37:42Z")

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* * *
This is a companion discussion topic for the original entry at [https://docs.katalon.com/katalon-studio/tutorials/verify-api-responses.html](https://docs.katalon.com/katalon-studio/tutorials/verify-api-responses.html)

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**Author:** ![craig.fisher](https://dub1.discourse-cdn.com/katalon/user_avatar/forum.katalon.com/craig.fisher/32/2548_2.png) [@craig.fisher](https://forum.katalon.com/u/craig.fisher)\
**Post date:** [March 4, 2019, 4:10pm UTC](https://forum.katalon.com/t/how-to-verify-api-responses-in-katalon-studio/16806/2 "2019-03-04T16:10:28Z")

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How would I check for the _existence_ of an element in a JSON response – but not care about the value…?

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**Author:** ![nausikaa.geeraert](https://avatars.discourse-cdn.com/v4/letter/n/f14d63/32.png) [@nausikaa.geeraert](https://forum.katalon.com/u/nausikaa.geeraert)\
**Post date:** [April 5, 2019, 10:22am UTC](https://forum.katalon.com/t/how-to-verify-api-responses-in-katalon-studio/16806/3 "2019-04-05T10:22:00Z")

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I do

import groovy.json.JsonSlurper as JsonSlurper  
def jsonSlurper = new JsonSlurper()  
def json = jsonSlurper.parseText(response.getResponseBodyContent())  
WS.verifyNotEqual(json.field, null)

Maybe there is shorter, but this construction works for a lot of other situations too