SERVER

Marrow

Rank #42,239

id.marrow/marrow

Evidence-grounded, graph-connected, correctable memory for agents.

7 versions

First listed

Jul 18, 2026

Last publish date

Jul 23, 2026

PURPOSE

What you can do with Marrow

Marrow is a Model Context Protocol (MCP) server. It ranks #42,239 of 151,203 active servers on MCP Toplist. Marrow is listed on Official MCP, with 7 tracked versions. It was first listed on Jul 18, 2026 and most recently updated on Jul 23, 2026.

Not verifiedMCP Toplist has not yet written a checked profile for this server, so the paragraph above is assembled from registry data only. Its registry listings below are the authority on what it does.

CAPABILITIES AND LIMITATIONS

What Marrow can and cannot do

Not verifiedMCP Toplist has not catalogued this server's tools or limitations. Check its registry listings below.

REQUIREMENTS

What you need before using Marrow

DeclaredNo credentialsNo credentials declared

The registry listing declares no required environment variables or authentication. This is declared metadata, not a verified install — the repository README is the authority.

MCP Toplist probed the public endpoint on Oct 17, 2026 and could not complete the MCP handshake (jsonrpc error). Requirements remain unverified.

Declared by the Official MCP Registry, last synced Oct 23, 2026. Not independently verified by MCP Toplist.

Declared in the registry install config

MARROW_API_KEY · required

Hosted endpoint declared as public.

INSTALLATION AND FIRST TASK

Connect Marrow and confirm it works

Remote · HTTP

claude mcp add --transport http marrow https://mcp.marrow.id/

npm package

claude mcp add marrow -e "MARROW_API_KEY=<your MARROW_API_KEY>" -- npx -y @marrowid/cli mcp

Replace each placeholder with your own value before saving.

Remote · HTTP

[mcp_servers.marrow]
url = "https://mcp.marrow.id/"

Add to ~/.codex/config.toml.

npm package

[mcp_servers.marrow]
command = "npx"
args = ["-y", "@marrowid/cli", "mcp"]

[mcp_servers.marrow.env]
MARROW_API_KEY = "<your MARROW_API_KEY>"

Add to ~/.codex/config.toml. Replace each placeholder with your own value before saving.

Remote · HTTP

https://mcp.marrow.id/

Settings → Connectors → “Add custom connector”, then paste this URL.

npm package

{
  "mcpServers": {
    "marrow": {
      "command": "npx",
      "args": [
        "-y",
        "@marrowid/cli",
        "mcp"
      ],
      "env": {
        "MARROW_API_KEY": "<your MARROW_API_KEY>"
      }
    }
  }
}

Add to claude_desktop_config.json (Settings → Developer → Edit Config). Replace each placeholder with your own value before saving.

Remote · HTTP

{
  "mcpServers": {
    "marrow": {
      "url": "https://mcp.marrow.id/"
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project).

npm package

{
  "mcpServers": {
    "marrow": {
      "command": "npx",
      "args": [
        "-y",
        "@marrowid/cli",
        "mcp"
      ],
      "env": {
        "MARROW_API_KEY": "<your MARROW_API_KEY>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project). Replace each placeholder with your own value before saving.

Remote · HTTP

{
  "servers": {
    "marrow": {
      "type": "http",
      "url": "https://mcp.marrow.id/"
    }
  }
}

Save as .vscode/mcp.json in your workspace.

npm package

{
  "servers": {
    "marrow": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@marrowid/cli",
        "mcp"
      ],
      "env": {
        "MARROW_API_KEY": "<your MARROW_API_KEY>"
      }
    }
  }
}

Save as .vscode/mcp.json in your workspace. Replace each placeholder with your own value before saving.

Remote · HTTP

{
  "mcpServers": {
    "marrow": {
      "serverUrl": "https://mcp.marrow.id/"
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

npm package

{
  "mcpServers": {
    "marrow": {
      "command": "npx",
      "args": [
        "-y",
        "@marrowid/cli",
        "mcp"
      ],
      "env": {
        "MARROW_API_KEY": "<your MARROW_API_KEY>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json. Replace each placeholder with your own value before saving.

Remote · HTTP

{
  "mcpServers": {
    "marrow": {
      "url": "https://mcp.marrow.id/"
    }
  }
}

npm package

{
  "mcpServers": {
    "marrow": {
      "command": "npx",
      "args": [
        "-y",
        "@marrowid/cli",
        "mcp"
      ],
      "env": {
        "MARROW_API_KEY": "<your MARROW_API_KEY>"
      }
    }
  }
}

Replace each placeholder with your own value before saving.

First successful task

After adding the config, ask your client to list this server's tools. A tool list confirms the connection; an empty list or an error means the server did not start or needs credentials.

MAINTENANCE AND EVIDENCE

What changed, and when this was checked

First listed: Jul 18, 2026
Latest version published: Jul 23, 2026
Version history: 7 versions tracked (below)
Requirements evidence: MCP Toplist probed the public endpoint on Oct 17, 2026 and could not complete the MCP handshake (jsonrpc error). Requirements remain unverified.
Profile checked: Not yet — purpose, capabilities and requirements above come from registry data only
Ranking data as of: Oct 5, 2026

Registry sightings

Official MCP ↗listed since Jul 23, 2026 · still listed

Do you maintain Marrow? to correct or enrich this profile.

VERSIONS

Available versions (7)

Version	Published
1.0.10	Jul 23, 2026
1.0.9	Jul 23, 2026
1.0.8	Jul 23, 2026
1.0.7	Jul 20, 2026
1.0.6	Jul 20, 2026
1.0.4	Jul 19, 2026
1.0.3	Jul 18, 2026

STANDING

#42,239of 151,203 active serversTop 50%

Ranks ahead of 108,964 of 151,203 servers on MCP Toplist.

BADGE

Show your rank

Maintain this server? Add the live rank badge to your README — it updates automatically as the leaderboard changes.

Markdown

[![MCP Toplist](https://mcptoplist.com/badge/id.marrow%2Fmarrow.svg)](https://mcptoplist.com/server/id.marrow%2Fmarrow)

HTML

<a href="https://mcptoplist.com/server/id.marrow%2Fmarrow"><img src="https://mcptoplist.com/badge/id.marrow%2Fmarrow.svg" alt="MCP Toplist: Top 50% of 151,203" /></a>

Variants: append ?metric=score or ?metric=stars to the image URL.

FAQ

Frequently asked questions

Is Marrow listed on the Official MCP Registry?: Yes — Marrow is listed on the Official MCP Registry.
How many versions does Marrow have?: MCP Toplist tracks 7 versions of Marrow, most recently published on Jul 23, 2026.

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