Weaviate v1.39.2 makes its MCP server stateless and refuses GET with a 405

GitHub·medium signalXBlueskyLinkedInCopy link

Released 2026-08-26 alongside backports to v1.38.13 and v1.37.15 on 2026-08-27, the vector database now runs its streamable MCP server stateless and returns 405 on GET rather than accepting it. The same batch adds a DigitalOcean generative module, export/import endpoints for database user API-key hashes, pins a minimum openssl version so cached Docker builds pull CVE fixes, and fixes an aggregator panic on mean/median/mode across multi-node remote shards after a JSON round trip. Running MCP stateless is the correct call for a horizontally scaled database, since it removes the session affinity that would otherwise pin an agent to one node.