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mcp/harbor
Verified official

MCP Output Firewall MCP

v0.3.0

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

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

transport:stdio runtime:npm
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Target client

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

This listing does not declare its tools. Connect the server and your client will discover them on the handshake.