Response time in REST client

I'm afraid not. The displayed Time: ... value is currently UI/runner metadata rather than a script-accessible property.

The IntelliJ HTTP Client currently does not expose the UI-measured request duration through response or client.test(). The documented response object provides response data such as status, headers, body, and content type, while client.test() only registers assertions.

You will need to measure it yourself. Placing the timestamp in a pre-request script will allow you to include the network request duration:

< {%
  client.global.set("requestStartedAt", Date.now());
%}

GET https://example.com

> {%
  const elapsed = Date.now() - Number(client.global.get("requestStartedAt"));

  client.test("Response time is acceptable", function () {
    client.assert(elapsed < 2000, "Request took too long: " + elapsed + " ms");
  });
%}