Memory MCP Server

npx -y @modelcontextprotocol/server-memory

{
  "mcpServers": {
    "memory-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-memory"
      ]
    }
  }
}

This reference server gives a model a small knowledge graph it can write to: entities, relations between them, and free-form observations attached to each entity. Facts collected in one conversation can be searched and reopened in the next, which is how it replaces a chat history the model no longer has. Everything is stored in a local JSONL file whose path is set with the MEMORY_FILE_PATH variable, so the data stays inspectable and easy to back up.