Nautilus Compass vs Penfield MCP

A side-by-side look at the Nautilus Compass and Penfield MCP MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.

Nautilus Compass logoNautilus CompassKnowledge & Memory · Local subprocess (stdio)Drift-aware cross-agent memory · MCP/A2A · LongMemEval-S 56.6% · 1/15 Zep cost47FairAuth: not declaredPenfield MCP logoPenfield MCPKnowledge & Memory · Local subprocess (stdio)Penfield: persistent memory with hybrid search (BM25 + vector + graph), 24 relationship types for knowledge graphs, context checkpoints for cognitive handoff, artifact storage, and personality system. Works across Claude, Cursor, Windsurf, and any MCP client.49FairAuth: oauth 2.0

Verdict: choose Nautilus Compass for knowledge & memory work as a local process; choose Penfield MCP for knowledge & memory as a local process. You can also run both side by side in one mcpServers block.

Which MCP server should you choose?

Nautilus Compass logoChoose Nautilus Compass when

  • You need dedicated capabilities in the Knowledge & Memory domain.
  • You prefer a local stdio subprocess transport.
Explore Nautilus Compass

Penfield MCP logoChoose Penfield MCP when

  • You need dedicated capabilities in the Knowledge & Memory domain.
  • You prefer a local stdio subprocess transport.
  • Its auth model fits you: OAuth 2.0.
Explore Penfield MCP

Feature & specification comparison

Rows where the two servers differ are marked.

SpecNautilus Compass logoNautilus CompassPenfield MCP logoPenfield MCP
CategoryKnowledge & MemoryKnowledge & Memory
Quality signal47/100 · Fair49/100 · Fair
Install commandConfirmedConfirmed
TransportLocal subprocess (stdio)Local subprocess (stdio)
AuthNot declaredOAuth 2.0
PricingNot declaredFree
Required env varsNone listedNone listed
Verified ownerCommunity listingCommunity listing
GitHub stars1,2566
Directory activity 1 views 0 installs 0 upvotes 4 views 0 installs 0 upvotes
ToolsNot listedNot listed

Tools & capabilities

Nautilus Compass tools

No tool names declared yet. Check the project README from the listing page.

Penfield MCP tools

No tool names declared yet. Check the project README from the listing page.

Ready-to-paste client configs

Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.

Nautilus Compass

mcpServers (Claude Desktop / Cursor)
{
  "mcpServers": {
    "nautilus-compass": {
      "command": "uvx",
      "args": [
        "nautilus-compass"
      ]
    }
  }
}

Penfield MCP

mcpServers (Claude Desktop / Cursor)
{
  "mcpServers": {
    "penfieldlabs-penfield-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote"
      ]
    }
  }
}

Frequently asked questions

Nautilus Compass is categorized under Knowledge & Memory and uses a local stdio subprocess. Penfield MCP belongs to Knowledge & Memory and uses a local stdio subprocess. Pick Nautilus Compass for knowledge & memory work and Penfield MCP for knowledge & memory.

Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client.

Nautilus Compass has no declared pricing — check the project's own site. Penfield MCP is listed as free. Auth: oauth 2.0. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.

Yes. MCP clients support multiple servers: add nautilus-compass and penfieldlabs-penfield-mcp as separate keys in the same mcpServers object, and your assistant will call tools from either one.

On AllMCPs, Nautilus Compass has a quality signal of 47/100 (Fair) with 1 views, 0 installs and 1,256 GitHub stars. Penfield MCP has 49/100 (Fair) with 4 views, 0 installs and 6 GitHub stars.