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Compare servers	Litmus
Purpose	Behavioral litmus harness for MCP servers — the open @polygraphso/litmus package (CLI, library, MCP server).
Authentication (maintainer declared)	Unknown
Public launch command	npx -y -p @polygraphso/litmus polygraphso-litmus litmus npm/@modelcontextprotocol/server-filesystem
Configuration source	Public install instructions
Observed tools	Unknown
Last complete tool check	Unknown
License	Apache-2.0
	Open setup

A complete tool check lists tools; it does not exercise them or certify security.