use LWP::UserAgent;

my $url = 'https://ptabdata.uspto.gov/ptab-api';
 
my $ua = LWP::UserAgent->new(
    ssl_opts => { verify_hostname => 0, SSL_verify_mode => 'SSL_VERIFY_NONE' }, 
    cookie_jar => {}, 
    );
 
my $response = $ua->get( "$url/documents", 'Accept' => 'application/json' );
print $response->content;