WordPress at a glance
action is not described

requests-(hook) action-hook . WP 1.0

Transforms a native Request hook to a WordPress actions.

This action maps Requests internal hook to a native WordPress action.

Usage

add_action( 'requests-(hook)', 'action_function_name_1635', 10, 3 );
function action_function_name_1635( $parameters, $request, $url ){
	// action...
}
$parameters(array)
Parameters from Requests internal hook.
$request(array)
Request data in WP_Http format.
$url(string)
URL to request.

Where the hook is called

WP_HTTP_Requests_Hooks::dispatch()
wp-includes/class-wp-http-requests-hooks.php 72
do_action_ref_array( "requests-{$hook}", $parameters, $this->request, $this->url );

Where the hook is used (in WP core)

Does not used.