The Memory MCP Server — A Knowledge Graph That Needs a Better Brain

At a glance: 81,600+ GitHub stars (monorepo), ~45,000 weekly npm downloads, v2026.1.26 (last release January 2026), 9 tools, actively maintained, ~61.2K weekly PulseMCP visitors (#21 globally, ~2M all-time) The Memory MCP server ( @modelcontextprotocol/server-memory ) is Anthropic's official solution for giving AI agents persistent memory across conversations. It maintains a local knowledge graph — entities, relations, and observations stored as JSONL — that agents can read and update over time. The idea is simple: your agent remembers who you are, what you're working on, and what you've told it before. It's one of the most popular MCP servers, pulling ~45,000 weekly npm downloads and ranking #21 globally on PulseMCP with over 2 million estimated all-time visitors. Unlike the archived SQLite and PostgreSQL reference servers, Memory is still actively maintained in the main servers repository. And the core concept works — agents that remember context are genuinely more useful than ones t