01
Do I have to trust XProva?
No, and that is the design. The receipt is signed with EIP-712, so you can check it in your own browser or inside a contract. A signature that does not match the verdict makes the receipt worthless.
The things buyers, workers and arbitrators ask before they let an oracle move their money.
No, and that is the design. The receipt is signed with EIP-712, so you can check it in your own browser or inside a contract. A signature that does not match the verdict makes the receipt worthless.
A verdict is a signed opinion, not a final word. Low confidence returns unclear instead of a pass, and either side can still open a dispute. XProva hands the arbitrator the full evidence bundle.
Nothing. XProva is registered on OKX as a free A2MCP service, so verifications and lookups alike are open. The x402 payment gate is implemented and waiting behind a price setting, which stays unset for now.
X Layer, chain id 196. Each receipt names the chain it was issued for, so a verdict cannot be lifted and replayed somewhere else.
Seven days by default. Every receipt carries an expiry, and a pass older than its window is stale, so the job has to be checked again before funds move.
Yes. That is Worker Shield. The worker asks for the check, but the same rules, the same model and the same signing key apply no matter who is asking, so it earns no advantage.
XProva grades against the requirements written into the job spec, never against taste. When the spec does not settle the question, the verdict is unclear and the job goes to arbitration instead of a coin flip.
Only its hash reaches the receipt. That proves exactly which artifact was graded without publishing the artifact itself.