Please provide more information about the data you need to retrieve, and if possible documentation to the callback API.
I have been a software developer for around 7 years now, I have previously worked as a developer of administrative websites for private companies developed with languages such as PHP, Javascript, CSS, HTML5, MySQL, and more. I currently work as a freelance Wordpress developer making custom themes and plugins as well as modifications on various aspects of the website. Feel free to send me a message so we can discuss further details. Thanks.