Is it possible to have more than one remote / async validator on an input field in ParsleyJS

In parsleyJS it's possible to create a remote validation with AJAX:

var $email_input = $('#id_email');

// Load validator
$email_input.attr('data-parsley-remote', "");
$email_input.attr('data-parsley-debounce', "1000");
$email_input.attr('data-parsley-remote-validator', "checkexistingcontact");
$email_input.attr('data-parsley-remote-message', "Contact email address already exists.");

window.Parsley.addAsyncValidator('checkexistingcontact', function(xhr) {
         return xhr.status >= 200 && xhr.status < 300;
    },
    '/contacts/validate_contact/?email={value}', { "type": "GET", "dataType": "json" });

It's also possible to include more than one syncronous validator by simply defining them and adding data-parsley-[mySyncrnousValidator] to the input field attr.

However, is it possible to run more than one remote validator? I can't see how to do this, as there does not appear to be a way to set data-parsley-remote-message in the addAsyncValidator function, so any additional async validators would have the same error message?

It wasn't designed like it. It is very easy to add your own custom validator that does an ajax request though.