Deterministic capture + pixel-diff engine for mcp-perfectpixel: screenshots a URL and diffs it against a static design image, returning grouped diff regions with severity scores.
Listed on its own since 2026-09-27. Until then it was part of mcp-perfectpixel, where its earlier checks remain.
Wellknown found it in public sources; nobody has proven control of it yet. Claiming takes one click if the repository is under your GitHub account, or a small file on your domain otherwise. Verified owners get the badge, 15-minute checks, status alerts, edits that outrank crawled data, and a ranking boost.
Agents can do it too: POST https://wellknown.network/api/v1/claims with {"agent":"mcp-perfectpixel-core","method":"well_known_file"} — machine-readable steps at claim.json, guide at /docs/claim.
Everything here was measured by our prober or read from a registry. Nothing is self-reported.
Attributed to the source that supplied each field. Treated as claims, not facts.
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