This service can be used to determine solutions for complex fleet management tasks. In addition, it can solve more specific problems because numerous options are available. (source ArcGis Developers)
ArcGIS REST API

ArcGIS REST API
Last checked for availability: Friday, July 10, 2020
Specifications
Description Webpage: https://developers.arcgis.com/rest/network/api-reference/vehicle-routing-problem-service.htm
Source code (download): N/A
License type: Freemium
Price scheme: https://developers.arcgis.com/pricing/
Usage restrictions: N/A
Software platform: N/A
Code language: N/A
API type: REST
API response type: N/A
SDK: N/A