"You may not use the Uber API in any manner that is competitive to Uber or the Uber Services, including in connection with any application, website or other product or service that also includes, features, endorses, or otherwise supports in any way a third party that provides services competitive to Uber’s products and services, as determined in our sole discretion."
"You may not use the Uber API in any manner that is competitive to Uber or the Uber Services, including in connection with any application, website or other product or service that also includes, features, endorses, or otherwise supports in any way a third party that provides services competitive to Uber’s products and services, as determined in our sole discretion."
https://developer.uber.com/v1/terms/ under 2.A