MCP Output Firewall for Claude Code

io.github.tangfei7777-cell/mcp-output-firewall

Three-layer firewall for MCP: content, egress and action policy. Proxy or server.

client:Claude Code transport:stdio runtime:npm

Install MCP Output Firewall in Claude Code

run in your project directory

claude mcp add mcp-output-firewall -- npx -y mcp-output-firewall

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs