Octobrain

Octobrain is an open-source MCP (Model Context Protocol) server that enables persistent, context-aware memory for AI assistants. It allows AI tools like Claude Desktop, Cursor, and other MCP clients to store, organize, and semantically search over insights, decisions, code, architecture notes, and documentation across sessions. Octobrain provides powerful semantic and hybrid BM25+vector search, knowledge indexing from URLs, documents, and files, and auto-linking between related memories via a knowledge graph, facilitating richer long-term context for software development and knowledge work. Its integrations and tools are particularly valuable for teams seeking smarter AI copilots, automated knowledge management, and enhanced assistant memory.