protocol
x402 v1
Supplied research: /supported kinds[] retains legacy network identifiers.
Specification reference ↗Declarations onlyAdvertised capabilities, not verified payments, settlement or uninterrupted availability.
Protocol context / supplied research
Standards & evidence
References explain declarations; they establish no facilitator support.
These specification references come from supplied research. The monitor does not fetch them. Scheme maturity is not assessed here.
protocol
x402 v2
Supplied research: kinds[], extensions[] and signers. Exact source fields remain in raw evidence. No payment verification.
Specification reference ↗extension
Bazaar
A declaration does not establish discovery endpoint availability or behavior; discovery endpoints are not polled.
Specification reference ↗Evidence semantics
Raw kinds[] preserves x402Version, scheme, network and optional extra. Unknown fields remain in raw JSON. Legacy network IDs are not rewritten.
Declaration and behavior are independent evidence channels. This monitor collects declarations only. No payment, settlement or optional discovery behavior is tested. First seen is the earliest retained positive observation, not launch time.
Failure never proves removal. After three consecutive successful snapshots omit a known capability, it is marked not advertised. There is no provider withdrawal inference.