This extension is pretty sweet:
Type or paste a plain-text HTTP Request in a window and execute it with a click. Even runs CURL statements as well.
POST https://example.com/comments HTTP/1.1
Content-Type: application/xml
Authorization: token xxx
<request>
<name>sample</name>
<time>Wed, 21 Oct 2015 18:27:50 GMT</time>
</request>
It certainly is no replacement for Postman or Graph Explorer, but sometimes you just need a quick call to visualize/validate the payload.
(Hat tip to http://josephwoodward.co.uk/2017/10/rest- client-for-vs-Code-an-elegant-alternative-postman)