Hi,
I have gone through the document, I can develop api for your website.
I am a full stack developer , having 10 years experience with 100% job success rate.I have extensive knowledge Wordpress and its plugins , JS and it's Frameworks (React, Angular, Express, Backbone, Express, Node, Moment, Vue, Typescript), Ajax, HTML5, CSS3, jQuery, MySQL, and Bootstrap.
This is a tentative bid, final time frame and cost will be provided once the scope and requirements are locked.
You will definitely experience a WOW factor in my work.