x402engine · Public certification
Probe evidence is older than the freshness window.
POST /api/llm/claude-sonnet
Level 1 confirms that the endpoint speaks MPP correctly before payment. Level 2 confirms that the registry actually paid the endpoint and received a successful response.
Level 1
This proof checks that the endpoint returns a valid unpaid MPP challenge and that the challenge can be parsed and normalized by the registry.
https://x4...e-sonnet:01cb89877-e...840998f344Level 2
This proof shows whether the registry actually paid the endpoint and received a successful post-payment response, using the stored receipt and payment reference as auditable evidence.
n/an/an/aProviders can embed this badge directly in docs, status pages, or changelogs. The link points back to this certification page so agents and humans can inspect the proof details.
Unpaid probe · 20 occurrence(s)
The connected provider workflow is tracked, but some monitored workflow evidence is stale.
The endpoint's latest verification evidence has fallen outside the freshness window.