I will build APIs using flask. Data interchange will take place in JSON format. I have enough experience in python as well as flask along with database technologies like MySQL. However you should describe the database format including table structure beforehand. Also you may specify JSON format for specific urls.
I have over 50 repositories on github under username bhishan . You can completely rely on the work.
The API will be:
accessible via url json data format full source code will be given