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Arcaeon

io.arcaeon/arcaeon ยท v0.10.0

A record of what an agent did that the agent cannot quietly rewrite, and a way for anyone to check.

Connect Runs on your machine

Terminal
claude mcp add arcaeon -e ARCAEON_KEY=<ARCAEON_KEY> -- uvx arcaeon==0.10.0
claude_desktop_config.json
{
  "mcpServers": {
    "arcaeon": {
      "command": "uvx",
      "args": [
        "arcaeon==0.10.0"
      ],
      "env": {
        "ARCAEON_KEY": "<ARCAEON_KEY>"
      }
    }
  }
}
~/.cursor/mcp.json
{
  "mcpServers": {
    "arcaeon": {
      "command": "uvx",
      "args": [
        "arcaeon==0.10.0"
      ],
      "env": {
        "ARCAEON_KEY": "<ARCAEON_KEY>"
      }
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "arcaeon": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "arcaeon==0.10.0"
      ],
      "env": {
        "ARCAEON_KEY": "<ARCAEON_KEY>"
      }
    }
  }
}

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools

This server runs locally, so its tools are listed by your MCP client once it starts.

Environment variables

NameDescription
ARCAEON_KEY
Optional, secret
Witness API key for the two paid tools (witness_pin, witness_renew). Free tools work without it.

Details

Package[email protected] (PYPI, stdio)
First published11 Nov 2026
Last updated11 Nov 2026
Registry nameio.arcaeon/arcaeon

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