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Independent measurements of remote MCP servers. Every observation has a timestamp.

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Prefix WhoIs. After you submit, put the verification token on the endpoint domain or in the GitHub repository, then press Verify.

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The email is stored so we can match the claim. It is not shown on the public listing.

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These figures are automated measurements with timestamps. They are not a review, rating, grade, or recommendation.

Catalog metadata: Official MCP Registry, CC0. MCP Heartbeat is not the Official MCP Registry.