Hello,
I've read your project details and your requirements. I can create the API for your service to your clients can easily connect to your server and access your services.
be for that I need to review the project for have a better estimation, please give me a file containing the some information about your services, like functions and etc....
I understand the range and importance of your task.
I can provide you perfect result .
Please don't hesitate to ask your questions.
Thank you