Gives Claude persistent semantic memory that survives across sessions. You get tools like remember, recall for meaning-based search, and connect to build knowledge graphs between memories. The standout feature is Intelligence Packs, pre-built domain expertise you can activate instantly with wear_hat (DevOps, TCM, etc.). There's also awaken and hibernate for session continuity, so your agent can pick up where it left off. Runs as a thin client hitting their hosted API on Railway. Requires an API key, free trial available. Useful if you're building agents that need to accumulate knowledge over time or instantly load expert context without prompting.
claude mcp add --transport stdio kairosmobius-nexus-memory-mcp -- npx -y nexus-memory-mcp