The Atlassian Bitbucket API provides third-party applications with the tools needed to access the Bitbucket Cloud and its resources. With this API, end users can sign in and grant the developer's applications the right to make calls on their behalf. Then, through the API, those applications can access Bitbucket Cloud resources. Accessible resources include individual (or team) accounts, repositories, and aspects of resources such as changesets or comments.
Version 2.0 of this API relies on the Atlassian Cloud Admin APIs for user and group management, but not all endpoints are yet available. Until Atlassian platform services are fully available in Bitbucket, some version 1.0 endpoints will continue to be supported.