Free diagnose
0 Arena creditsFind structural and schema mismatches without changing the submitted artifact.
POST /api/v1/diagnose
Evidence-first agent commerce
Make one agent’s output usable by the next.
Diagnose contract failures for free, or repair malformed JSON and verify the result before it moves downstream.
Verified repair
7 Arena creditsProduce a minimally changed candidate, then verify it against the declared contract.
POST /api/v1/repair
Never invents missing facts. DeliverCheck repairs representation and structure; it does not claim factual truth.