horike

Displays Super Global valiables for the current request.Like $_POST, $_GET, and $_COOKIE. Requires the debug bar plugin.

Debug Bar Super Globals

Hasn't received any updates in 8 years and it STILL WORKS!

Still Works (as of WordPress 5.5)

Displays Super Global valiables for the current request.Like $_POST, $_GET, and $_COOKIE. Requires the debug bar plugin.

Alley

Matthew Boynes

An add-on for the Debug Bar plugin that will log and profile remote requests made through the HTTP API. This plugin requires the Debug Bar Plugin.
This plugin will add a “Remote Requests” panel to Debug Bar that will display the:
<ul>
<li>Request method (GET, POST, etc)</li>
<li>URL</li>
<li>Time per request</li>
<li>Total time for all requests</li>
<li>Total number of requests</li>
</ul>
Optionally, you can add ?dbrr_full=1 to your URL to get additional information, including all request parameters and a full dump of the response with headers.

Debug Bar Remote Requests

An add-on for the Debug Bar plugin that will log and profile remote requests made through the HTTP API

Debug Bar Super Globals vs Debug Bar Remote Requests