API's authentication uses OAUTH 2 protocol..
You must provide 'access_token' parameter to your API calls.
PHP
$urlToken = 'https://mtxserv.com/oauth/v2/token?';
$query = array(
'grant_type' => 'https://mtxserv.com/grants/api_key',
'client_id' => '',
'client_secret' => '',
'api_key' => ''
);
$response = file_get_contents($urlToken . http_build_query($query));
var_dump($response); // contain access token
JAVASCRIPT
var urlToken = 'https://mtxserv.com/oauth/v2/token';
var query = {
grant_type: 'https://mtxserv.com/grants/api_key',
client_id: '',
client_secret: '',
api_key: ''
};
$.ajax({
url: urlToken,
dataType: 'json',
data: query,
success: function(data) {
console.log(data); // contain access token
},
error: function(data) {
console.log(data.responseText);
}
});