{"tier":"observed","enabled":true,"observed_by":"https://modelmarket.dev","interval_s":21600,"ttl_s":43200,"vouches_for":"only that, at observed_at, an unpaid request to url returned a 402 naming this amount, asset, network and payTo","how_to_buy":"Call the url yourself and pay per the 402 it returns. This hub is not in the payment path and holds no seller signature: refuse if that 402 names another payTo than pay_to here, or asks for more than amount_atomic.","sellers":[],"spec":"aimarket-protocol/spec.md §2.7","protocol_version":"v2"}