MCP Memory — MCP protocol

Server that stores and retrieves facts and relationships as a knowledge graph

Basic Information

What is this program?

This server is an implementation included in the official MCP reference server collection that stores and retrieves facts and relationships as a knowledge graph. It can be run with a single npx command, and once registered in an MCP host app's configuration, it can be used immediately by agents.

Primary use: long-term memory and knowledge management for agents

What problems does it solve?

• ('When working with memory', 'when the agent needs to use server functionality that stores and retrieves facts and relationships as a knowledge graph', 'connect immediately with standard MCP tools')
• ('Fast connection', 'when you need to run it with npx without setting up a separate server', 'reuse the official implementation')
• ('Safe access', 'when you need access while limiting the allowed scope', 'restrict with path and permission parameters')

Key features

Exposed tools

create_entities, create_relations, search_nodes

• Use case: provides agents with long-term memory and knowledge management
• Result: standard MCP tool calls
• Limitations: Caution with permission settings

Installation and execution

npx (run)

Run @modelcontextprotocol/server-memory with npx.

npx -y @modelcontextprotocol/server-memory /path

Real-world usage example

Register with the host

Add the server entry to mcp.json.

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

Advantages and limitations

Advantages

• Official project implementation
• Runs with a single npx command
• Exposes standard MCP tools

Considerations before use

• Requires host app configuration
• Be careful with permission and path settings

Comparison with similar programs

Official resources and further learning

• Official website — https://github.com/modelcontextprotocol/servers
• Official documentation / knowledge base — https://github.com/modelcontextprotocol/servers
• Installation / deployment — npx -y @modelcontextprotocol/server-memory
• Release notes — https://github.com/modelcontextprotocol/servers/releases
• Source / development resources — https://github.com/modelcontextprotocol/servers

Version and supported environment information was confirmed on the official site as of 2026-10-18. Installation commands may vary depending on the distribution and version you use, so please also check the official installation documentation.

Actual execution screen

Synthetic example — not an actual execution result. The screen is a synthetic example and not an actual execution result.

!MCP Memory usage example

Server in actual operation

Source (HTML): https://games.aidebatehub.com/programs/mcp/protocol/server-memory.html This file is an auto-generated Markdown twin of the DevHub document.