Abstract: Provided are systems and methods for a tour optimization application programming interface (API). The API can include a first set of instructions associated with a tour optimization data structure that can be associated with the API and specify a plurality of messages including one or more fields. The plurality of messages can be associated with a set of shipments and a set of vehicles. A second set of instructions can be associated with a modeling function that can implement one or more calls to generate model data based in part on the plurality of messages. A third set of instructions can be associated with implementation of a tour optimization service and can generate routing data for a user of the software application based on the model data. The routing data can include a set of routes based in part on the set of shipments and the set of vehicles.