Best memory & reasoning MCP server for Claude Desktop, tested

Dated results

• Memory (reference) passed in Claude Desktop on 2026-10-21 (Claude Desktop 2.37337.1 (Linux beta, Electron 44.7.0), @modelcontextprotocol/server-memory 2.0.0, no connect within 60s). Full result
• Sequentialthinking (reference) passed in Claude Desktop on 2026-10-14 (Claude Desktop 2.37337.1 (Linux beta), package version not recorded, connected in 2.0s). Full result
• context-mode passed in Claude Desktop on 2026-10-14 (Claude Desktop 2.37337.1 (Linux beta), package version not recorded, connected in 2.1s). Full result
• Engram passed in Claude Desktop on 2026-10-21 (Claude Desktop 2.37337.1 (Linux beta, Electron 44.7.0), server reported v3.5.2, connected in 0.0s). Full result

Why Memory (reference) is the candidate

Memory (reference) passed every step in Claude Desktop. It is the group’s site-wide candidate (judged 2026-10-21): Saved a code in one session and recalled it in a fresh session in both Claude Code and Cursor (3 calls in total), using one local JSON file with no network or account. Context-mode also passed recall in both (4 calls) but needs Node 22.5+. Sequential Thinking passed its reasoning task in both, but it has no storage, so it isn't judged on recall. On Oct 14 Memory and context-mode also passed recall in Claude Desktop and ChatGPT (Codex); in Claude Desktop, Memory also listed older codes left in the shared test file by earlier runs. On Oct 19 Memory 2.0.0 (new major, Node 24+) was retested and passed recall again in Claude Code and Cursor. Confirmed Oct 21, 2026: second runs on 2.0.0 passed in all 4 clients (Claude Code and Cursor Oct 19, ChatGPT (Codex) Oct 20, Claude Desktop Oct 21). First runs were on 1.0.0.

Provisional: based on one dated run per app (no repeat runs yet), so treat it as a candidate, not a final pick. How we test.

What failed or is partial in Claude Desktop

None of these servers failed in Claude Desktop.

Install in Claude Desktop

The exact snippet we tested is on the Memory (reference) page (pick the Claude Desktop tab). Not connecting? Claude Desktop MCP troubleshooting.

Not tested in Claude Desktop yet

Everything (reference), Basic Memory, MemPalace, Supermemory, claude-mem, cognee, agentmemory, Graphiti MCP, MCP Memory Service, Jev Agent, OKF Agent Memory, Jev MCP. Listed from their source; no result in Claude Desktop yet.

Questions

What is the best memory & reasoning MCP server for Claude Desktop?

In ToolPassed's hands-on tests in Claude Desktop, Memory (reference) is our provisional candidate for memory & reasoning: it passed install, connect, tools and an agent task on 2026-10-21. We ran 4 memory & reasoning MCP servers in Claude Desktop; 4 passed every step.

Does Memory (reference) work with Claude Desktop?

Memory (reference) passed in Claude Desktop on 2026-10-21 (Claude Desktop 2.37337.1 (Linux beta, Electron 44.7.0), @modelcontextprotocol/server-memory 2.0.0, no connect within 60s).