Agoranome inspector
The key that signs the inspector's book, published here as well as in the book
A free, signed weekly record of what machine-payment sellers (x402, MPP) list against what they actually ask for when asked without paying. A separate program from the Lab.
The book's first signing key
7pG2bGERXACET2iKMCbgBBKsud-c-6gA-b0aoHVkgTg
EdDSA (Ed25519); the kid is the key's RFC 7638 JWK thumbprint.
The inspector's verifier checks a book against its first key as published somewhere other than the book. This is that place: if the kid here and the book's first key differ, do not trust the book.