Is KRE license is required to run a Katalon script in Azure Devops

Hi team,
We already had a azure devops license and we are maintaing katalon script(web testing) in azure repositary
So with the help of Azure DevOps Extension( Execute Katalon Studio Tests)
can we trigger a katalon scripts in pipeline without KRE license?

You might want to look into Katalon Runtime Engine, which is needed to run commands (which can run parameterized tests). Katalon Studio Enterprise and Katalon Runtime Engine are two different products, the latter being the one needed to execute tests in CLI, CI/CD, Docker, etc. Introduction to Runtime Engine | Katalon Docs

Below are the question i need a solution from you.
1.Katalon KRE license is required to trigger katalon script in Azure DevOps?
2. katalon for azure devops(Execute Katalon Studio Tests) Is this azure plugin/Extention is not free?
3.Under Azure devops license,katalon for azure devops plugin is not free of cost?

no.
KRE license is required to run whatever tests on whatever hosts, either by using KRE native installed or a Docker image on the executor.
The only thing Azure Devops will do is to trigger whatever script on whatever host.

Azure Devops is a Microsoft cloud service, have nothing to do with any Katalon cloud services.
Such can be used together, the Katalon plugin for Azure Devops is free as far as i know, but is not enough.
The plugin only provides connectivity between the two services.

If you insist on this to be your relevant question the answer is YES.
You can trigger whatever you like from Azure Devops without a Katalon license.
If the trigger actually launches and run what you expect, is a different story.

i will not share any additional view.
I said you can trigger whatever you like. I never said will work
kindly do your homework’s