API Suite is designed to encourage developers, architects, and product owners to use the platform and ultimately connect applications with APIs to create business value.
As a key part of this approach, there is no limit on the traffic volume of API calls per day, although we do apply and ask you to observe our Fair Use Policy. This policy is intended to avoid service degradation to other users due to excessive traffic by a single user on the overall API Suite Cloud infrastructure.
Note that although traffic is not capped, limits do apply for Marketplace integrations (specifically synchronization volumes), according to the Plan you have subscribed to.