• Version 3 of the Zotero Web API: items, collections, saved searches, tags, the delete log, library settings, full-text content and the file protocol.
• Object keys, search syntax, pagination, authentication and access control.
• The item type schema and the endpoints derived from it.
• Concurrent writes serialised, so one request produces exactly one new version.
• A command line for provisioning, CI, and the documentation to go with it.