Weaviate

Weaviate is an open-source vector database that provides semantic and hybrid (vector+keyword) search capabilities through a REST API. It includes a built-in Model Context Protocol (MCP) server from v1.37.1 onward, exposing tools for collection schema inspection, tenant listing, hybrid search, and data upserts. This platform is ideal for developers and enterprises building search, AI, and knowledge graph applications that require scalable vector data management and contextual querying.