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Cap Shield

io.github.robinlidberg-dot/cap-shield ยท v0.4.1

Context selection and compression for AI agents - recall measured, not claimed.

Connect Runs on your machine

Terminal
claude mcp add cap-shield -e CAP_SHIELD_API_KEY=<CAP_SHIELD_API_KEY> -- uvx cap-shield==0.4.1
claude_desktop_config.json
{
  "mcpServers": {
    "cap-shield": {
      "command": "uvx",
      "args": [
        "cap-shield==0.4.1"
      ],
      "env": {
        "CAP_SHIELD_API_KEY": "<CAP_SHIELD_API_KEY>"
      }
    }
  }
}
~/.cursor/mcp.json
{
  "mcpServers": {
    "cap-shield": {
      "command": "uvx",
      "args": [
        "cap-shield==0.4.1"
      ],
      "env": {
        "CAP_SHIELD_API_KEY": "<CAP_SHIELD_API_KEY>"
      }
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "cap-shield": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "cap-shield==0.4.1"
      ],
      "env": {
        "CAP_SHIELD_API_KEY": "<CAP_SHIELD_API_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
CAP_SHIELD_API_KEY
Optional, secret
Only needed for the two tools that store and retrieve memory. measure_traffic and list_packages work without it.

Details

Package[email protected] (PYPI, stdio)
First published26 Aug 2026
Last updated26 Aug 2026
Registry nameio.github.robinlidberg-dot/cap-shield

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