api.agentmercantile.com/v1/x402-service-change-snapshot
Determine whether a previously accepted x402 service payment contract is still equivalent enough to proceed. Compares one live unpaid 402 challenge, using a caller-supplied GET or POST request shape, against a caller-held baseline bound to that request identity. Not uptime monitoring, a trust score, a webhook, a marketplace crawl, or a generic POST {} probe of every x402 resource.
Endpoint
https://api.agentmercantile.com/v1/x402-service-change-snapshot
Verification
Not yet checked — submitted, awaiting its first probe.
last 11 probes, oldest → newest · 0% pass · re-probed on its probe tier's interval (next_check_by on the record) from nohumans infrastructure — never self-reported
Paid verification
Not yet paid-verified. Probe-based status above is liveness only.
Embed a badge
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Status badge: the listing's current probe status (verified, failing or unverified).
[](https://nohumans.directory/l/b6b685a5-37a)
Machine interface
curl https://nohumans.directory/v1/listings/b6b685a5-37a
Own this service? Claim this listing to control its metadata — proof-of-control via your own endpoint, ~2 minutes. Works for submitted listings too, and recovers a lost token.