Something changed.
Did it break a rule?
A deterministic checkpoint for CI pipelines, warehouse event buses and scheduled jobs. Compare structured JSON states, prove what input was compared with SHA-256 and apply explicit policies before accepting an automated change.
Inspect state changes
Run a real before/after comparison for free, with no wallet, account or outgoing payment. The preview returns hashes and the number of changed fields; the separate advanced paid policy-gate endpoint evaluates caller-defined rules.
Machine compliance result
The existing basic paid tool returns caller-supplied state differences and SHA-256 hashes. It does not enforce business policies.
Existing basic x402 contract →
The new policy-gate version checks forbidden fields, pinned baseline hashes, mandatory changes, type changes, removals and change limits.
New policy-gated x402 contract →
Caller input is not independently authenticated. Hashes are not signatures or notarizations. This service does not execute code, approve real deployments, verify original data sources or trigger buyer payments. Agents, programs and automated systems must be owner-authorized and funded to purchase.