To be honest wix does not allow to add such kind of API in the code. There is no option for such kind of coding. If you ask me to convert your website in some other platform and add this API then I can do this job at very low cost. I have 10+ years of experience in web design and development. I expertise in WordPress, Mysql, jquery, Ajax, CSS, HTML, PHP frameworks like CakePHP, Laravel, CI etc. You can check my portfolio and reviews. Please initiate the chat so we can discuss it and finalise it.
Thanks,