/api/pin/: Query all the States/api/pin/:state: Query All the Districts in selected State/api/pin/:state/:DistrictsName: Query All the city in selected District/api/pin/:state/:DistrictsName/:city: Query All the Post Office in selected city/api/pin/find/:Pincode: Query for the details of selected pin code.
Here selected means the data which you passed in the URL
Don't use this for production, this is purely for educational purpose and the data may be inaccurate