I am in the process of creating an application which can tell people when a bus leaves from a certain stop and I would like to add route planning to it.
I need a way to plan routes from a stop to another in a couple of seconds. I'm getting my data from a GTFS file parsed to SQLite
I have looked at OpenTripPlanner and GraphServer, but I couldn't find an API which can plan routes and give those routes back in a JSON or some other format.