The LWP::UserAgent module can be used to issue a REST API request. For example, let's say a GET request to www.example.com/api should return "Hello World", and Dumper can be used to display the response.

#!/usr/bin/perl
use strict;
use warning;
use LWP::UserAgent;
use Data::Dumper;

my $ua = LWP::UserAgent->new;
my $request = HTTP::Request->new(GET => "http://www.example.com/api");
my $response = $ua->request($request);

print Dumper $response;

Something like this should be returned.

$VAR1 = bless( {
                 '_protocol' => 'HTTP/1.1',
                 '_content' => 'Hello World',
                 '_rc' => '200'
});

And here is how you would print only the content.

if ( $response->is_success ) {
  print $response->decoded_content;
}
else {
  print "failed";
}

Or all headers.

print $response->headers()->as_string;

Or a specific header.

print $response->header('Content-Type');

Or a previous header, such as when there is a 302 redirect.

print $response->previous->header('location');