Turn a response value into a regression check

When a response contains a value your UI or integration depends on, use the value itself to generate a post-response check.

1. Start the Catalog API. Save a GET request to {{baseUrl}}/account. Set its API key in Authorization, with name X-API-Key, placement Header, and value catalog-demo.
2. Send the request. In Body → Tree, open the node actions for role and choose Add a script assertion.
3. Open the request’s Scripts tab. The generated post-response check compares role with the observed value reader. Save the request.
4. Send it again and open the response Scripts tab. The assertion should pass. You can run the same check with other requests in a collection run.

Use Copy for JavaScript from the same menu if you want the expression for a more specific test. For expected behavior that varies across environments, read the expected value from a variable instead of hard-coding it. See the script reference.