{"service":"402.coffee — external arbiter (paid signed verdicts)","what":"POST /arbiter/verify with x402 payment ($0.25) and a machine-verifiable claim → signed verdict attestation (release / refund / escalate) with itemized evidence. Your escrow contract executes the verdict — funds never pass through 402.coffee.","categories":{"http-delivery":"conditions: { url, expect_status?, expect_sha256?, min_bytes?, expect_contains? } — we fetch the deliverable ourselves","payload-hash":"conditions: { payload_text | payload_b64, expected_sha256 }","ci-status":"conditions: { repo: \"owner/name\", commit_sha } — public GitHub check-runs must have completed successfully"},"scored_variant":"POST https://api.402.coffee/arbiter/verify/scored ($0.60) — same verdict plus both parties' 402.coffee risk tiers embedded","signature":"Ed25519 detached JWS (same key as /credential) — verify offline with npm 402coffee-verify-credential; keys at /.well-known/jwks.json","policy":"https://api.402.coffee/arbiter/policy","price":"$0.25 USDC on Base via x402"}