Demand a verifiable EMILIA authorization receipt for any irreversible agent action. Emits Receipt Required challenges (428, with legacy 402 compatibility) and tells the agent exactly what to bring.
Listed on its own since 2026-09-26. Until then it was part of emilia-protocol-mcp-guard, 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":"emilia-protocol-require-receipt","method":"well_known_file"} — machine-readable steps at claim.json, guide at /docs/claim.
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