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mcp/harbor
Verified official

TestLens MCP

v1.1.0

net.bigfloppy.testlens/testlens

Paste code + tests, get a strong/weak verdict with killed/survived mutants. Free API + MCP.

transport:streamable-http tools:2
View source Website

Target client

run in your project directory 

claude mcp add --transport http testlens https://testlens.bigfloppy.net/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

testlens_mutate

testlens mutate

testlens_health

testlens health

All 2 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.