The Model Derivative API enables users to represent and share their designs in different formats, as well as to extract valuable metadata. (Its translation functionality was previously bundled as part of the “View and Data API”).
Autodesk services are governed by the following Terms of service http://www.autodesk.com/company/legal-notices-trademarks/terms-of-service-autodesk360-web-services/autodesk-web-services-api-beta-terms-of-service
The status of the Autodesk services can be found here https://developer.autodesk.com/en/support/api-status
Authentication is done with a 2-legged token a guide on how to create an application and retrieves the bearer token is available in the Forge Documentation
There is a wealth of tools and libraries available for the forge services on their Github