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Live probe evidence, not marketing pages: grade, reachability, auth behavior, latency, tool catalog, and public trust observations for up to three servers.
Name or partial name; best-scoring match is used. Try an example comparison .
Operational grades come from deterministic protocol probes. Trust Receipts separately publish dated security/access, data-integrity, citation, claim-verification, and reviewed field evidence; missing evidence is unaudited , never a pass. Data source: the official MCP registry . MCP Queen is an independent index by the team behind Constat and Clarity . The grade badge represents operational probe results only—not security or data-quality certification.