server
Open source
free (OSS, MIT)

MCP Memory Server

Reference MCP server that gives an agent a persistent knowledge graph — entities, relations, observations stored to disk and surfaced back across sessions. The simplest path to making an agent remember context between conversations without standing up a real vector store; an entry-tier alternative to Zep / Graphiti.

By Fredoline Eruo·Last verified Jun 12, 2026·60,000 GitHub stars

Overview

Reference MCP server that gives an agent a persistent knowledge graph — entities, relations, observations stored to disk and surfaced back across sessions. The simplest path to making an agent remember context between conversations without standing up a real vector store; an entry-tier alternative to Zep / Graphiti.

Stack & relationships

How MCP Memory Server relates to other entries in the catalog — recommended pairings, alternatives, dependencies, and edges to avoid. Each edge carries a one-line operator note from our editorial team.

MCP Memory Server ↔ ecosystem

Recommended stack

  • Commonly deployed with
    Claude Desktop

    Default memory layer for personal Claude Desktop setups. Reference implementation that Anthropic maintains.

Alternatives

  • Alternative to
    Mem0 (agent memory API)

    MCP Memory is JSON-on-disk knowledge-graph memory — entry-tier. Mem0 is a richer drop-in API. Pick MCP Memory for trivial setup; Mem0 for production-grade memory.

  • Alternative to
    Letta (memory framework)

    MCP Memory is JSON-on-disk knowledge-graph memory — entry-tier. Letta is OS-style explicit management. Pick MCP Memory for trivial setup; Letta for production-grade memory.

  • Alternative to
    Zep (memory platform)

    MCP Memory is graph-shaped but simple; Zep is graph-shaped and sophisticated. The architectural difference shows up at scale — MCP Memory wobbles past a few thousand entities; Zep doesn't.

Pros

  • Persistent agent memory in one server install
  • Knowledge-graph shape (entities + relations) not just blobs
  • Reference-grade simplicity

Cons

  • JSON-on-disk storage — not for production-scale memory
  • No semantic search, only graph traversal
  • No multi-agent isolation

Compatibility

Operating systems
macOS
Linux
Windows
GPU backends
n/a
LicenseOpen source · free (OSS, MIT)

Runtime health

Operator-grade signals on how actively MCP Memory Server is being maintained, how fresh its measurements are, and what failure classes operators have flagged. Every label below is anchored to a real date or count — we never infer maintainer activity we can't show.

Release cadence

Derived from the most recent editorial signal on this row.

Active
Updated Jun 12, 2026

8 days since last refresh · source: lastUpdated

Benchmark freshness

How recent the editorial measurements on this runtime are.

0editorial benchmarks

No editorial benchmarks for this runtime yet.

Community reproduction

Submissions that match an editorial measurement on similar hardware.

0reproduced reports

No community reproductions on file yet.

Get MCP Memory Server

Official site
https://modelcontextprotocol.io
GitHub
https://github.com/modelcontextprotocol/servers

Frequently asked

Is MCP Memory Server free?

Yes — MCP Memory Server is free to use and open-source.

What operating systems does MCP Memory Server support?

MCP Memory Server supports macOS, Linux, Windows.

Does MCP Memory Server need a GPU?

No — MCP Memory Server runs on CPU; it does not require or use a GPU.

Reviewed by RunLocalAI Editorial. See our editorial policy for how we evaluate tools.

Related — keep moving

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When it doesn't work
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Alternatives
SGLangText Generation Inference (TGI)vLLMQdrantWeaviateGraphiti (Zep)LanceDBRedis (vector search)
Before you buy

Verify MCP Memory Server runs on your specific hardware before committing money.

Will it run on my hardware? →Custom hardware comparison →GPU recommender (4 questions) →