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mcp/harbor
Verified official

isatty MCP

v0.1.0

space.unhandled/isatty

Reverse CAPTCHA: prove a language model is on the other end and get a signed attestation.

transport:streamable-http tools:3
Website

Target client

run in your project directory 

claude mcp add --transport http isatty https://isatty.unhandled.space/mcp

setup guides: Claude Code Claude Desktop Cursor VS Code Zed Windsurf Cline Gemini CLI Grok ChatGPT Claude.ai LangChain

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

get_entry_challenge Read-only

get entry challenge

enter

enter

check Read-only

check

All 3 tools, one page each

Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. Check the server's own documentation before granting access.