SERVER

Nucleus

Rank #6,399

io.github.eidetic-works/nucleus

Sovereign Agent OS — Persistent Memory, Governance & Compliance for AI Agents.

8 versions

5 GitHub stars

by eidetic-works (1 servers)View repository ↗

First listed

Feb 9, 2026

Last publish date

Jul 19, 2026

PURPOSE

What you can do with Nucleus

Nucleus is a Model Context Protocol (MCP) server published by eidetic-works. It ranks #6,399 of 152,076 active servers on MCP Toplist, and its repository has 5 GitHub stars. Nucleus is listed across 4 registries — Official MCP, PulseMCP, Glama and mcp.so, with 8 tracked versions. It was first listed on Feb 9, 2026 and most recently updated on Jul 19, 2026.

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

CAPABILITIES AND LIMITATIONS

What Nucleus can and cannot do

Not verifiedMCP Toplist has not catalogued this server's tools or limitations. The repository README lists them.

REQUIREMENTS

What you need before using Nucleus

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 21, 2026 and could not complete the MCP handshake (jsonrpc error). Requirements remain unverified.

Declared by PulseMCP, last synced Aug 31, 2026. Not independently verified by MCP Toplist.

Declared in the registry install config

NUCLEUS_BRAIN_PATH · optional

Hosted endpoint declared as public.

INSTALLATION AND FIRST TASK

Connect Nucleus and confirm it works

Remote · HTTP

claude mcp add --transport http nucleus https://relay.nucleusos.dev/mcp

Python package (PyPI)

claude mcp add nucleus -e "NUCLEUS_BRAIN_PATH=<your NUCLEUS_BRAIN_PATH>" -- uvx nucleus-mcp

Replace each placeholder with your own value before saving.

Remote · HTTP

[mcp_servers.nucleus]
url = "https://relay.nucleusos.dev/mcp"

Add to ~/.codex/config.toml.

Python package (PyPI)

[mcp_servers.nucleus]
command = "uvx"
args = ["nucleus-mcp"]

[mcp_servers.nucleus.env]
NUCLEUS_BRAIN_PATH = "<your NUCLEUS_BRAIN_PATH>"

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

Remote · HTTP

https://relay.nucleusos.dev/mcp

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

Python package (PyPI)

{
  "mcpServers": {
    "nucleus": {
      "command": "uvx",
      "args": [
        "nucleus-mcp"
      ],
      "env": {
        "NUCLEUS_BRAIN_PATH": "<your NUCLEUS_BRAIN_PATH>"
      }
    }
  }
}

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

Remote · HTTP

{
  "mcpServers": {
    "nucleus": {
      "url": "https://relay.nucleusos.dev/mcp"
    }
  }
}

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

Python package (PyPI)

{
  "mcpServers": {
    "nucleus": {
      "command": "uvx",
      "args": [
        "nucleus-mcp"
      ],
      "env": {
        "NUCLEUS_BRAIN_PATH": "<your NUCLEUS_BRAIN_PATH>"
      }
    }
  }
}

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

Remote · HTTP

{
  "servers": {
    "nucleus": {
      "type": "http",
      "url": "https://relay.nucleusos.dev/mcp"
    }
  }
}

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

Python package (PyPI)

{
  "servers": {
    "nucleus": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "nucleus-mcp"
      ],
      "env": {
        "NUCLEUS_BRAIN_PATH": "<your NUCLEUS_BRAIN_PATH>"
      }
    }
  }
}

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

Remote · HTTP

{
  "mcpServers": {
    "nucleus": {
      "serverUrl": "https://relay.nucleusos.dev/mcp"
    }
  }
}

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

Python package (PyPI)

{
  "mcpServers": {
    "nucleus": {
      "command": "uvx",
      "args": [
        "nucleus-mcp"
      ],
      "env": {
        "NUCLEUS_BRAIN_PATH": "<your NUCLEUS_BRAIN_PATH>"
      }
    }
  }
}

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

Remote · HTTP

{
  "mcpServers": {
    "nucleus": {
      "url": "https://relay.nucleusos.dev/mcp"
    }
  }
}

Python package (PyPI)

{
  "mcpServers": {
    "nucleus": {
      "command": "uvx",
      "args": [
        "nucleus-mcp"
      ],
      "env": {
        "NUCLEUS_BRAIN_PATH": "<your NUCLEUS_BRAIN_PATH>"
      }
    }
  }
}

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: Feb 9, 2026
Latest version published: Jul 19, 2026
Version history: 8 versions tracked (below)
Requirements evidence: MCP Toplist probed the public endpoint on Oct 21, 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 25, 2026

Registry sightings

Official MCP ↗listed since Apr 25, 2026 · still listed
PulseMCP ↗listed since Jun 4, 2026 · still listed
Glama ↗listed since Jun 4, 2026 · still listed
mcp.so ↗listed since Aug 26, 2026 · still listed

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

VERSIONS

Available versions (8)

Version	Published
1.15.2	Jul 19, 2026
1.15.0	Jul 18, 2026
1.13.3	Jun 23, 2026
1.13.1	Jun 14, 2026
1.13.0	Jun 13, 2026
1.8.0	Apr 4, 2026
1.0.4	Feb 10, 2026
0.1.0	Nov 25, 2024

STANDING

#6,399of 152,076 active serversTop 5%

Ranks ahead of 145,677 of 152,076 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/io.github.eidetic-works%2Fnucleus.svg)](https://mcptoplist.com/server/io.github.eidetic-works%2Fnucleus)

HTML

<a href="https://mcptoplist.com/server/io.github.eidetic-works%2Fnucleus"><img src="https://mcptoplist.com/badge/io.github.eidetic-works%2Fnucleus.svg" alt="MCP Toplist: Top 5% of 152,076" /></a>

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

FAQ

Frequently asked questions

Who maintains Nucleus?: Nucleus is maintained by eidetic-works, which publishes 1 MCP server (8 total versions) tracked on MCP Toplist.
Is Nucleus listed on the Official MCP Registry?: Yes — Nucleus is listed on the Official MCP Registry, alongside PulseMCP, Glama and mcp.so.
How many versions does Nucleus have?: MCP Toplist tracks 8 versions of Nucleus, most recently published on Jul 19, 2026.
Where can I find the source code for Nucleus?: The source code for Nucleus is hosted at github.com/eidetic-works/nucleus-mcp.

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