Memory
90,704 starsOfficial MCP reference server: persistent cross-session memory as a knowledge graph (entities, relations, observations) stored in a local JSONL file (path set via MEMORY_FILE_PATH), exposed through both tools and a resource.
- First published：2024-11-19
- data as of：
- 2026-09-30
- Licence：
- MIT / Apache-2.0（repo 正在授權轉移，見 repo LICENSE）
- Transport：
- stdio
- Primitives exposed：
- tools / resources
What it can touch
Reads and writes exactly one local JSONL file (the memory store). No network, no other files. Note, though: whatever is written there is read back into the model in every later session.
Risk
Memory poisoning is the main risk: one injected conversation can write malicious observations into the graph, and every later session reads them back as fact — persistent injection across conversations. The store is plaintext; any sensitive content written to it stays on disk.
Install prompt
從官方參考 server 倉庫的 Memory 目錄取得說明，把 README 的客戶端設定片段（以 npx 啟動 @modelcontextprotocol/server-memory）加進你的 MCP 客戶端設定檔，然後重啟客戶端。若要自訂儲存位置，先設定 MEMORY_FILE_PATH 環境變數。Paste this to your agent. It deliberately contains no tool subcommands — check the tool's official docs for commands.