PHP

<!DOCTYPE html>
<html>
<body>

<?php

function hex2bin( $hex ) { /* only needed for PHP < 5.4 */
        return pack('H*', $hex);
}

function execRFG_API( $command ) {
        /* put your APID and SECRET below */
        $apid = '';
        $secret = '';

        /* do not modify below */
        $key = hex2bin($secret);
        $tm=time();
        $hash = hash_hmac("sha1",$tm.$command,$key);
        $api_url = "https://api.researchforgood.com/API?apid=$apid&time=$tm&hash=$hash";

        $ch = curl_init($api_url);
        curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
        curl_setopt($ch, CURLOPT_POSTFIELDS, $command);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_HTTPHEADER, array(
                'Content-Type: application/json',
                'Content-Length: ' . strlen($command))
        );

        $result = curl_exec($ch);
        curl_close($ch);
        return $result;
}


echo execRFG_API( '{ "command" : "test/copy/1" , "data1" : "THIS IS A TEST"}' );

?>

</body>
</html>