What is the best MCP memory server in 2026?

It depends on what should be remembered. Facts about you in one desktop client: the official reference server or Basic Memory, both free and local. Memory shared by your own agents: Mem0 or Supermemory. A library of the videos, podcasts and articles you learn from, searchable from Claude, ChatGPT, Cursor and other clients: BrainTube.

What is the official MCP memory server?

The reference server published by the MCP project as @modelcontextprotocol/server-memory. It stores entities, relations and observations in a local knowledge-graph file so an assistant can remember facts about you across chats. Its README calls it a basic implementation; it has no semantic search.

Which MCP memory servers work with ChatGPT and Claude.ai?

Hosted servers with a public HTTPS endpoint, because web clients can't reach a server running only on your machine. BrainTube works with Claude, ChatGPT, Cursor and other MCP clients. Local servers such as the official memory server work in desktop clients that run them.

Can the AI save to an MCP memory server, or only read?

Most memory servers let the assistant write. Library servers differ: BrainTube is read-write on every plan (your AI can save what it finds, add notes and tag items), while Recall's server was read-only as of 4 October 2026.

Do I need to host an MCP memory server myself?

No. Local servers run on your machine and self-hosted ones on your own server, but hosted servers such as BrainTube, Mem0 and Supermemory only need their URL added to your client and a sign-in.

Roundup · 2026

Best MCP memory servers in 2026

Eight servers, sorted by the question that decides it: should your AI remember facts about you, or the sources you learn from?

By Ilian Raykov, founder of BrainTube

Updated 30 October 2026

The short answer

For facts about you on one machine, start with the official reference server (@modelcontextprotocol/server-memory) or Basic Memory, both free and local. For memory your agents share across apps, a hosted developer platform such as Mem0 or Supermemory. For a library of what you read and watch that Claude, ChatGPT, Cursor and other clients can all search, a hosted library server: BrainTube (read-write, YouTube and podcasts included), Readwise (highlights and articles) or Recall (read-only as of 4 October 2026).

Server	What it stores	Where it runs	AI can write	Cost
Official memory server	Facts as a knowledge graph (entities, relations, observations)	Local, one JSONL file	Yes	Free
Basic Memory	Notes as linked Markdown files	Local; paid cloud plan	Yes	Free locally (AGPL-3.0)
mcp-memory-service	Memories in a database you run	Self-hosted	Yes	Free, your hosting
Mem0 (hosted MCP)	Memories for agents and apps	Hosted	Yes	Free tier, 1,000 retrievals a month
Supermemory	App and user memories	Hosted, OAuth	Yes	Credit-metered, free monthly allowance
BrainTube	Your library: YouTube transcripts, podcasts, articles, PDFs, notes	Hosted, OAuth or API key	Yes: save, note, tag	Free; Starter $9/mo
Readwise	Highlights, articles and documents	Hosted	Yes	From $9.99/mo billed yearly
Recall	Saved articles and videos	Hosted	No (read-only, 4 Oct 2026)	Free; Plus $10/mo billed yearly

From each project's README or pricing page, October 2026. Recall and Readwise MCP status as of 4 October 2026.

Two kinds of memory server

A fact store keeps short facts the assistant writes during chats: your role, your project, your preferences. The official reference server is the plain example. A library keeps the sources themselves (transcripts, articles, PDFs) and answers from them with citations. If what you want remembered is what you watched and read, a fact store won’t hold it.

How to choose

Local or hosted: local keeps data on your disk but works only in desktop clients; hosted works in Claude.ai, ChatGPT and on any device.
Read-only or read-write: decide whether agents may save what they find into the store.
Leaving: check the export. BrainTube exports as Markdown or Anki cards from Settings, or the whole corpus through MCP; Basic Memory is already files on disk.

Where BrainTube fits

BrainTube is a hosted library server at https://mcp.brain-tube.com/mcp, listed in the official MCP Registry. Every account gets 40 tools, 10 of them write-capable, on every plan including Free. A session loads the 12 everyday ones by default and reaches the rest through a tool finder, or all 40 with ?tools=full. It fills itself from the YouTube videos, podcasts and articles you save, links them in a knowledge graph, and lets Claude, ChatGPT, Cursor and other MCP clients search it.

More: what an MCP memory server is, step-by-step MCP setup and tools to build a personal knowledge base for AI.

Frequently asked

What is the best MCP memory server in 2026?: It depends on what should be remembered. Facts about you in one desktop client: the official reference server or Basic Memory, both free and local. Memory shared by your own agents: Mem0 or Supermemory. A library of the videos, podcasts and articles you learn from, searchable from Claude, ChatGPT, Cursor and other clients: BrainTube.
What is the official MCP memory server?: The reference server published by the MCP project as @modelcontextprotocol/server-memory. It stores entities, relations and observations in a local knowledge-graph file so an assistant can remember facts about you across chats. Its README calls it a basic implementation; it has no semantic search.
Which MCP memory servers work with ChatGPT and Claude.ai?: Hosted servers with a public HTTPS endpoint, because web clients can't reach a server running only on your machine. BrainTube works with Claude, ChatGPT, Cursor and other MCP clients. Local servers such as the official memory server work in desktop clients that run them.
Can the AI save to an MCP memory server, or only read?: Most memory servers let the assistant write. Library servers differ: BrainTube is read-write on every plan (your AI can save what it finds, add notes and tag items), while Recall's server was read-only as of 4 October 2026.
Do I need to host an MCP memory server myself?: No. Local servers run on your machine and self-hosted ones on your own server, but hosted servers such as BrainTube, Mem0 and Supermemory only need their URL added to your client and a sign-in.

Save once. Query anywhere.

Your YouTube library, in the AI tools you already use.

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