The \x2520 means that a space character (originally encoded as %20) gets written as \x2520, that is, as \x25 (the percent sign) and then the 20.

I think you will need to properly URL-encode your payload, but I don't know what parts you actually need to change.

I think in my example, you can simply replace all \x25 by % and it will still work. But all + will need to be encoded as %2b, because that's how URL-encoded stuff works.

The main problem that I now see in your code is that you are constructing an URL that contains the form parameters. This is not how POST requests work. You need to put the form parameters in the request body. Most likely something like the following will work:

    my %form = (
        To => "+1234",
        From => "+5678",
        Body => "Hello Friend",
    );
    my $res = $ua->post( $url, \%form );
[download]

i tried this but also not working

#!/usr/bin/perl
use strict;
use warnings;

use LWP::UserAgent;
use CGI::Carp qw(fatalsToBrowser warningsToBrowser);

print "Content-type: text/html\n\n";

my $ua = LWP::UserAgent->new();

my $url = "https://api.twilio.com/2010-04-01/Accounts/AC9c1ff2d1880e4a
+ff9d16d3a033b4631c/Messages.json";

my %form = (
        To => "+156775562300",
        From => "+14155238886",
        Body => "Hello Friend",
    );
    

    my $response = $ua->post(
    $url,
    'Authorization' => 'Basic QUM5YzFmZjJkMTg4MGU0YWZmOWQxNmQzYTAzM2I0
+NjMxYzplYmFjZTRhYmQ0ZmY1NGM5NDNlZGFlZTg0YjJhMGY0MA==',
    'Content-Type'   => 'application/x-www-form-urlencoded',
    'Content' => %form,
);

if ($response->is_success) {
    print $response->decoded_content;
}
else {
    print $response->decoded_content;
}
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it does not read to phone number.

{"code": 21604, "message": "A 'To' phone number is required.", "more_info": "https://www.twilio.com/docs/errors/21604", "status": 400}

but your first example code worked very well, but only was for sms not whatsapp, the only problem was constructing this body

 To=whatsapp:+2123456789&From=whatsapp:+14155238886&Body=hey test msg
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because this worked very well, but its not the request i want to send. you bypassed my question

Body=This\x2520is\x2520the\x2520ship\x2520that\x2520made\x2520the\x2520Kessel\x2520Run\x2520in\x2520fourteen\x2520parsecs\x253F&From=\x252B15017122661&To=\x252B15558675310

You should see some warnings. The Content key takes a hash reference, not a hash (See post of LWP::UserAgent):

   my $response = $ua->post(
    $url,
    'Authorization' => 'Basic QUM5YzFmZjJkMTg4MGU0YWZmOWQxNmQzYTAzM2I0
+NjMxYzplYmFjZTRhYmQ0ZmY1NGM5NDNlZGFlZTg0YjJhMGY0MA==',
    'Content-Type'   => 'application/x-www-form-urlencoded',
    'Content' => \%form, # note the backslash here!
);
[download]