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mcp/harbor
Verified official

Port 21 MCP

v1.0.0

io.github.sadri-dridi/port-21

Whether 21 is a common TCP/UDP port.

transport:streamable-http
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Target client

run in your project directory 

claude mcp add --transport http port-21 https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/port-21/mcp

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.