You can get or update any data, such as issues, Wiki pages and files, on Backlog. In addition, you can also manage projects and users with Backlog API. See API list for details.
You can use Ajax requests on your browser as Backlog API supports Cross Origin Resource Sharing (CORS).
You can access the Backlog API in two ways: (1) API key or (2) OAuth 2.0. See Authentication & Authorization for details.