Hello Sir, I can help you to work with your API for pulling the CRM details , and we can done this asap, please contact me further, as I've a well experience in working with Backend API for more banking applications and all,
> Web Applications using PHP + MySQLi + API + jQuery
> Restful Web services: REST, SOAP
> Payment Gateway : Ccavenue, EBS, Paypal, Bitcoin
> Design Pattern : Bootstrap 3+
> CMS: Wordpress, Joomla