Using Flightmap you can get the best solutions to all your delivery problems within minutes.
Log on to https://app.flightmap.io and sign up to receive the authentication key.
Create a JSON request as mentioned below for the respective API i.e. Simple routing.
In the headers, add the Authentication Key value pair that was mailed to you along with the 'Content-type' as 'application/json'.
Finally you will receive a JSON Response with the solution.