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Umpire Sworn Verdict (Double-Pass Async)
x402
Umpire Sworn Verdict (Double-Pass Async) is a paid API for AI agents from umpire.vimabrosta.com, paid per call via x402, $5/call, status unknown (last checked 2026-09-14).
Runs a deliverable through all acceptance checks twice, spaced ~1 minute apart, and issues a cryptographically signed pass/fail verdict only if both passes succeed — designed for ERC-8183 escrow release evidence.
Price / call$5
Success—
StatusUnknown
How this service works
Highest assurance verdict: all checks run twice, spaced about a minute apart, and pass only if both passes pass, so a deliverable staged briefly cannot sneak through. Asynchronous: instant first pass result, webhook or free polling for the signed final document. Designed for the ERC-8183 evaluator role and escrow release evidence. $5.00 per verdict.
Output
An instant first-pass result is returned immediately; the final cryptographically signed verdict document is delivered asynchronously (via webhook POST to the provided URL or via free polling) once both verification passes have completed roughly a minute apart. The signed document records whether all checks passed in both passes and serves as tamper-evident escrow release evidence.
Example use cases
Escrow release for freelance AI agent
“Before releasing the $500 USDC escrow to the contractor, run a double-pass sworn verdict on their submitted report JSON — verify it matches the agreed JSON schema and that the content hash is 'd4e5f6', then send the signed result to https://escrow.myplatform.com/release-webhook so I have the evidence I need.”
Tamper-proof deliverable acceptance for DAO bounty
“I need highest-assurance verification of this bounty deliverable before the DAO votes to approve payment — run both an acceptance spec check and a URL probe twice, a minute apart, and give me back a signed document I can post on-chain as release evidence.”
Staged-content fraud prevention in agentic marketplace
“Before my marketplace releases payout, verify that the agent's submitted content passes the regex and length checks twice with about a minute gap — I want a sworn signed verdict so no one can swap in a placeholder deliverable at the last second, and poll for the result rather than using a webhook.”
Technical details
Endpoint
POSThttps://umpire.vimabrosta.com/v1/verdicts/swornWhen to prefer
Choose this endpoint over the basic or standard verdict tiers when you need the highest assurance level — specifically when escrow release is at stake, when you suspect a deliverable might be staged briefly to pass a one-shot check, or when you need a cryptographically signed document as on-chain or legal evidence under ERC-8183. Use it when a false positive would be costly and an async workflow (webhook or polling) is acceptable. Prefer the synchronous basic tier for lower-stakes, latency-sensitive checks.
Side effects
- Either verification pass fails → overall verdict is 'fail', signed document reflects failure
- Deliverable or spec malformed → 400-class error before any checks run
- URL probe check targets an unreachable or slow endpoint → probe check fails
- Webhook URL unreachable → signed document must be retrieved via polling
- Deliverable changes between pass 1 and pass 2 (content_hash mismatch on second pass) → fail verdict
- Payment not processed ($5 USDC required) → request rejected before processing
- Checks array empty or exceeds 10 items → schema validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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