# API Testing **URL:** https://forum.katalon.com/c/api-testing/107.md [Latest](https://forum.katalon.com/latest.md) · [Categories](https://forum.katalon.com/categories.md) · [Tags](https://forum.katalon.com/tags.md) --- ## [About the API Testing category](https://forum.katalon.com/t/about-the-api-testing-category/185286)
**Author:** [@nghi.phan](https://forum.katalon.com/u/nghi.phan)\ **Replies:** 0\ **Last updated:** [November 5, 2025, 5:13pm UTC](https://forum.katalon.com/t/about-the-api-testing-category/185286 "2025-11-05T17:13:05Z")
Dear Community Users, Welcome to the API Testing category, a space for QA engineers, testers, and d… --- ## [How to manage multiple drivers (Web, mobile and API) together](https://forum.katalon.com/t/how-to-manage-multiple-drivers-web-mobile-and-api-together/96891)
**Author:** [@poorna.chandra](https://forum.katalon.com/u/poorna.chandra)\ **Replies:** 6\ **Last updated:** [October 14, 2026, 9:59am UTC](https://forum.katalon.com/t/how-to-manage-multiple-drivers-web-mobile-and-api-together/96891 "2026-10-14T09:59:47Z")
Dear Community Friends, I have a requirement to manage the Multiple Drivers (Web, Mobile and API) t… --- ## [Adding AWS signature as authentication to API requests ](https://forum.katalon.com/t/adding-aws-signature-as-authentication-to-api-requests/109223)
**Author:** [@nidhi3112](https://forum.katalon.com/u/nidhi3112)\ **Replies:** 3\ **Last updated:** [October 10, 2026, 4:51pm UTC](https://forum.katalon.com/t/adding-aws-signature-as-authentication-to-api-requests/109223 "2026-10-10T16:51:28Z")
Hi, I am new to Katalon Studio and exploring it for API test automation. Our API requests use AWS a… --- ## [Adding DatePicker/TimePicker in API request ](https://forum.katalon.com/t/adding-datepicker-timepicker-in-api-request/108680)
**Author:** [@vishakha.vijay](https://forum.katalon.com/u/vishakha.vijay)\ **Replies:** 5\ **Last updated:** [October 10, 2026, 4:32pm UTC](https://forum.katalon.com/t/adding-datepicker-timepicker-in-api-request/108680 "2026-10-10T16:32:35Z")
Hi i was earlier using postman . Now i have to switch to Katalon - While implementing something tha… --- ## [Try this API inspector](https://forum.katalon.com/t/try-this-api-inspector/191071)
**Author:** [@Monty\_Bagati](https://forum.katalon.com/u/Monty_Bagati)\ **Replies:** 13\ **Last updated:** [October 10, 2026, 8:11am UTC](https://forum.katalon.com/t/try-this-api-inspector/191071 "2026-10-10T08:11:24Z")
I just published a Chrome extension I’ve been working on : API Inspector Pro ! Basically, it lets y… --- ## [Error in Katalon Studio when using SOAP API: ParseError at \[row,col\]:\[1,1\] Message Content is not allowed in prolog](https://forum.katalon.com/t/error-in-katalon-studio-when-using-soap-api-parseerror-at-row-col-1-1-message-content-is-not-allowed-in-prolog/104129)
**Author:** [@nsyahirahzmi](https://forum.katalon.com/u/nsyahirahzmi)\ **Replies:** 3\ **Last updated:** [October 9, 2026, 11:06am UTC](https://forum.katalon.com/t/error-in-katalon-studio-when-using-soap-api-parseerror-at-row-col-1-1-message-content-is-not-allowed-in-prolog/104129 "2026-10-09T11:06:53Z")
Hello Katalon Community, I’m encountering an issue while working with a SOAP API in Katalon Studio.… --- ## [REST API - dynamically test all elements of an array response](https://forum.katalon.com/t/rest-api-dynamically-test-all-elements-of-an-array-response/132804)
**Author:** [@ross.kuhlman](https://forum.katalon.com/u/ross.kuhlman)\ **Replies:** 3\ **Last updated:** [October 9, 2026, 9:28am UTC](https://forum.katalon.com/t/rest-api-dynamically-test-all-elements-of-an-array-response/132804 "2026-10-09T09:28:51Z")
I want to test an API function that returns an array of contacts in JSON. Depending on who is making… --- ## [HttpMessage NotReadableException API](https://forum.katalon.com/t/httpmessage-notreadableexception-api/132381)
**Author:** [@coldplays6371](https://forum.katalon.com/u/coldplays6371)\ **Replies:** 3\ **Last updated:** [October 9, 2026, 9:28am UTC](https://forum.katalon.com/t/httpmessage-notreadableexception-api/132381 "2026-10-09T09:28:26Z")
Dear All, I have some issue. I set variable in an api object but when I hit from Katalon it give re… --- ## [Getting 400 Bad Request if using variables, but fine with hard coded values](https://forum.katalon.com/t/getting-400-bad-request-if-using-variables-but-fine-with-hard-coded-values/134895)
**Author:** [@syerra.sunil](https://forum.katalon.com/u/syerra.sunil)\ **Replies:** 4\ **Last updated:** [October 9, 2026, 9:28am UTC](https://forum.katalon.com/t/getting-400-bad-request-if-using-variables-but-fine-with-hard-coded-values/134895 "2026-10-09T09:28:17Z")
I m able to PUT the HTTP request when i m using had coded values. But getting 400 Bad request if… --- ## [WaitForElement - Don't wait](https://forum.katalon.com/t/waitforelement-dont-wait/85105)
**Author:** [@thanh.tung.170861](https://forum.katalon.com/u/thanh.tung.170861)\ **Replies:** 18\ **Last updated:** [July 20, 2026, 7:07am UTC](https://forum.katalon.com/t/waitforelement-dont-wait/85105 "2026-07-20T07:07:31Z")
I am also facing the same problem as in this topic WaitForElement - does not work as required I don… --- ## [Katalon Object Manager throws SSLHandshake Exception on mTLS API requests](https://forum.katalon.com/t/katalon-object-manager-throws-sslhandshake-exception-on-mtls-api-requests/192084)
**Author:** [@Falak](https://forum.katalon.com/u/Falak)\ **Replies:** 2\ **Last updated:** [June 25, 2026, 7:49am UTC](https://forum.katalon.com/t/katalon-object-manager-throws-sslhandshake-exception-on-mtls-api-requests/192084 "2026-06-25T07:49:24Z")
Hey everyone, I’m really hitting a wall here. My team just moved our APIs to require mutual TLS (mTL… --- ## [Help! getElementPropertyValue() is ignoring my response headers in Katalon?](https://forum.katalon.com/t/help-getelementpropertyvalue-is-ignoring-my-response-headers-in-katalon/191773)
**Author:** [@ali.zaidi](https://forum.katalon.com/u/ali.zaidi)\ **Replies:** 6\ **Last updated:** [June 17, 2026, 8:43am UTC](https://forum.katalon.com/t/help-getelementpropertyvalue-is-ignoring-my-response-headers-in-katalon/191773 "2026-06-17T08:43:43Z")
Hey everyone, I’m pretty new to API testing in Katalon Studio and I’ve been stuck on this for the l… --- ## [How to verify a specific value in a huge JSON array?](https://forum.katalon.com/t/how-to-verify-a-specific-value-in-a-huge-json-array/191556)
**Author:** [@qurzunta.kaab](https://forum.katalon.com/u/qurzunta.kaab)\ **Replies:** 2\ **Last updated:** [June 8, 2026, 4:56pm UTC](https://forum.katalon.com/t/how-to-verify-a-specific-value-in-a-huge-json-array/191556 "2026-06-08T16:56:21Z")
Here is how i did it. Is there any better way Custom Keyword package com.api.helpers import com.k… --- ## [Why am I getting a 415 Error in Katalon when my JSON body is right there?](https://forum.katalon.com/t/why-am-i-getting-a-415-error-in-katalon-when-my-json-body-is-right-there/191345)
**Author:** [@hamzakhan](https://forum.katalon.com/u/hamzakhan)\ **Replies:** 5\ **Last updated:** [June 2, 2026, 9:10am UTC](https://forum.katalon.com/t/why-am-i-getting-a-415-error-in-katalon-when-my-json-body-is-right-there/191345 "2026-06-02T09:10:06Z")
Hi everyone, I’m pretty new to API testing in Katalon Studio and I’ve been stuck on this for hours. … --- ## [Hi community , i am not able to print the payload and response from network tab in katalon console. can anyone respond me regards this](https://forum.katalon.com/t/hi-community-i-am-not-able-to-print-the-payload-and-response-from-network-tab-in-katalon-console-can-anyone-respond-me-regards-this/182777)
**Author:** [@chetan.chavan](https://forum.katalon.com/u/chetan.chavan)\ **Replies:** 7\ **Last updated:** [March 24, 2026, 5:32am UTC](https://forum.katalon.com/t/hi-community-i-am-not-able-to-print-the-payload-and-response-from-network-tab-in-katalon-console-can-anyone-respond-me-regards-this/182777 "2026-03-24T05:32:37Z")
i’m facing some issue, while trying to catch payload --- ## [Certificate Not Visible on Profile – Assistance Required](https://forum.katalon.com/t/certificate-not-visible-on-profile-assistance-required/187553)
**Author:** [@karansp29](https://forum.katalon.com/u/karansp29)\ **Replies:** 6\ **Last updated:** [January 22, 2026, 3:42am UTC](https://forum.katalon.com/t/certificate-not-visible-on-profile-assistance-required/187553 "2026-01-22T03:42:12Z")
I have completed the API Testing course, and both courses show 100% completion. However, I still hav… --- ## [TestCaseId](https://forum.katalon.com/t/testcaseid/13287)
**Author:** [@Valeriy](https://forum.katalon.com/u/Valeriy)\ **Replies:** 11\ **Last updated:** [October 4, 2025, 10:44pm UTC](https://forum.katalon.com/t/testcaseid/13287 "2025-10-04T22:44:39Z")
Is there are any possibility to initialize a string variable with test case id? for example, I want to do smth like this In TestCase: def currentTestCaseId = this.id and then I want to create a method and send there … --- ## [URL is always after :rollback? cut off](https://forum.katalon.com/t/url-is-always-after-rollback-cut-off/182094)
**Author:** [@lukas.nowicki](https://forum.katalon.com/u/lukas.nowicki)\ **Replies:** 7\ **Last updated:** [September 14, 2025, 11:46am UTC](https://forum.katalon.com/t/url-is-always-after-rollback-cut-off/182094 "2025-09-14T11:46:55Z")
Hello everyone, I would like to put together a URL with the path Katalon always cuts off everything… --- ## [Git CI/CD pipeline integration with KRE](https://forum.katalon.com/t/git-ci-cd-pipeline-integration-with-kre/181560)
**Author:** [@ica\_mmbs\_support](https://forum.katalon.com/u/ica_mmbs_support)\ **Replies:** 3\ **Last updated:** [September 3, 2025, 6:25am UTC](https://forum.katalon.com/t/git-ci-cd-pipeline-integration-with-kre/181560 "2025-09-03T06:25:32Z")
Hi, we want to integrate with Git pipeline running in a unix machine with katalon runtime engine run… --- ## [running a webap\[i test, unable to chane content type to application/json](https://forum.katalon.com/t/running-a-webap-i-test-unable-to-chane-content-type-to-application-json/177892)
**Author:** [@rmorayniss](https://forum.katalon.com/u/rmorayniss)\ **Replies:** 3\ **Last updated:** [July 8, 2025, 3:38am UTC](https://forum.katalon.com/t/running-a-webap-i-test-unable-to-chane-content-type-to-application-json/177892 "2025-07-08T03:38:21Z")
I am testing my first api, In the http headers section I have content-type set tp application/json … --- ## [Parse entire JSon response](https://forum.katalon.com/t/parse-entire-json-response/177446)
**Author:** [@dean.deguzman](https://forum.katalon.com/u/dean.deguzman)\ **Replies:** 1\ **Last updated:** [July 2, 2025, 9:19am UTC](https://forum.katalon.com/t/parse-entire-json-response/177446 "2025-07-02T09:19:11Z")
How to extract the entire JSon Response? I have GET endpoint and I need to use the entire response … --- ## [Parameterize UrlEncodedHttpBody in Web Service Object does not work with variables](https://forum.katalon.com/t/parameterize-urlencodedhttpbody-in-web-service-object-does-not-work-with-variables/41828)
**Author:** [@ixent.gallego](https://forum.katalon.com/u/ixent.gallego)\ **Replies:** 3\ **Last updated:** [June 27, 2025, 12:58am UTC](https://forum.katalon.com/t/parameterize-urlencodedhttpbody-in-web-service-object-does-not-work-with-variables/41828 "2025-06-27T00:58:20Z")
I have seen Here: https://docs.katalon.com/katalon-studio/docs/parameterize-a-web-service-object.ht… --- ## [How can you make HTTP Header Dynamic?](https://forum.katalon.com/t/how-can-you-make-http-header-dynamic/41966)
**Author:** [@mkhan](https://forum.katalon.com/u/mkhan)\ **Replies:** 4\ **Last updated:** [June 19, 2025, 1:42am UTC](https://forum.katalon.com/t/how-can-you-make-http-header-dynamic/41966 "2025-06-19T01:42:32Z")
For one of my headers (externalReferenceID) I want to make it dynamic to always generate a new strin… --- ## [Problem w OAuth 2.0 callback URL](https://forum.katalon.com/t/problem-w-oauth-2-0-callback-url/63801)
**Author:** [@chris.oneal](https://forum.katalon.com/u/chris.oneal)\ **Replies:** 5\ **Last updated:** [June 6, 2025, 3:58am UTC](https://forum.katalon.com/t/problem-w-oauth-2-0-callback-url/63801 "2025-06-06T03:58:49Z")
Good morning, I’m attempting to establish a connection with Google Calendar API that I have full ow… --- ## [Katalon not get the default driver for chrome when upgrate to 10.2.1](https://forum.katalon.com/t/katalon-not-get-the-default-driver-for-chrome-when-upgrate-to-10-2-1/175408)
**Author:** [@jian\_chen](https://forum.katalon.com/u/jian_chen)\ **Replies:** 1\ **Last updated:** [June 5, 2025, 4:53am UTC](https://forum.katalon.com/t/katalon-not-get-the-default-driver-for-chrome-when-upgrate-to-10-2-1/175408 "2025-06-05T04:53:14Z")
2025-06-04 18:27:03.286 INFO c.k.k.c.w.d.chrome.ChromeDriverUtil - Checking and download if ne… --- ## [Write a java application that would take in either one or two strings. Determine if the string are actual word in the English dictionary (using an external API resource). If a single string is given, also determine if the string is a palindrome. If two st](https://forum.katalon.com/t/write-a-java-application-that-would-take-in-either-one-or-two-strings-determine-if-the-string-are-actual-word-in-the-english-dictionary-using-an-external-api-resource-if-a-single-string-is-given-also-determine-if-the-string-is-a-palindrome-if-two-st/174167)
**Author:** [@shitolekavita316](https://forum.katalon.com/u/shitolekavita316)\ **Replies:** 2\ **Last updated:** [May 21, 2025, 5:52am UTC](https://forum.katalon.com/t/write-a-java-application-that-would-take-in-either-one-or-two-strings-determine-if-the-string-are-actual-word-in-the-english-dictionary-using-an-external-api-resource-if-a-single-string-is-given-also-determine-if-the-string-is-a-palindrome-if-two-st/174167 "2025-05-21T05:52:30Z")
Write a java application that would take in either one or two strings. Determine if the string are … --- ## [SOAP API getting error SSLHandshakeException: No trusted certificate found in Katalon](https://forum.katalon.com/t/soap-api-getting-error-sslhandshakeexception-no-trusted-certificate-found-in-katalon/173265)
**Author:** [@sampath.bejugama](https://forum.katalon.com/u/sampath.bejugama)\ **Replies:** 3\ **Last updated:** [May 12, 2025, 4:37am UTC](https://forum.katalon.com/t/soap-api-getting-error-sslhandshakeexception-no-trusted-certificate-found-in-katalon/173265 "2025-05-12T04:37:47Z")
I am able to successfully execute a SOAP API request using SOAP UI, but when attempting the same in … --- ## [Katalon crashes after MacOS Sequoia 15.4.1 update](https://forum.katalon.com/t/katalon-crashes-after-macos-sequoia-15-4-1-update/172034)
**Author:** [@numan.aksakal](https://forum.katalon.com/u/numan.aksakal)\ **Replies:** 3\ **Last updated:** [April 25, 2025, 3:02am UTC](https://forum.katalon.com/t/katalon-crashes-after-macos-sequoia-15-4-1-update/172034 "2025-04-25T03:02:23Z")
I have received an update for my Mac-Apple M3. Katalon Studio Arm 64, 9.7.5. My current version is m… --- ## [API testing using Postman collection](https://forum.katalon.com/t/api-testing-using-postman-collection/170592)
**Author:** [@sandeep4582kumar](https://forum.katalon.com/u/sandeep4582kumar)\ **Replies:** 2\ **Last updated:** [April 8, 2025, 4:16pm UTC](https://forum.katalon.com/t/api-testing-using-postman-collection/170592 "2025-04-08T16:16:10Z")
https://${base}.omnipodapps.com/api/v3/provisioning/nonce?base=horizonmobile-int Above URI is an ge… --- ## [Prevent Katalon Studio from Parsing HTML responses for Web Service Requests](https://forum.katalon.com/t/prevent-katalon-studio-from-parsing-html-responses-for-web-service-requests/169691)
**Author:** [@lmmuchiri](https://forum.katalon.com/u/lmmuchiri)\ **Replies:** 3\ **Last updated:** [March 28, 2025, 8:07am UTC](https://forum.katalon.com/t/prevent-katalon-studio-from-parsing-html-responses-for-web-service-requests/169691 "2025-03-28T08:07:24Z")
When I send a REST API call and the server responds with a HTML response body (Http Code 504: Gatewa… [Next page](https://forum.katalon.com/c/api-testing/107.md?page=1)