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Verity Suite Arbiter Quick
x402
Verity Suite Arbiter Quick is a paid API for AI agents from verity-suite.onrender.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-15).
Adjudicates two or more conflicting claims against provided evidence, returning a calibrated verdict on which claim is better supported.
Price / call$0.03
Success—
StatusUnknown
How this service works
The trust fabric for AI agents — calibrated, fail-closed services agents pay per call.
Output
Returns a verdict of 'claim_supported', 'undecidable', or 'insufficient_evidence'; a calibrated confidence score (0–1, must be 0.0 unless a single claim wins); an array of concrete reasons citing which evidence supports or undercuts which claim by index; optionally the zero-based index of the best-supported claim; and optionally a list of what specific evidence would be needed to resolve an undecidable or evidence-poor case.
Example use cases
Example prompt
“I need you to arbitrate a dispute: Claim 0 says 'the Earth is approximately 4.5 billion years old' and Claim 1 says 'the Earth is approximately 6,000 years old' — here are three evidence excerpts from peer-reviewed geology sources supporting Claim 0. Which claim do these sources better support and how confident are you?”
Technical details
Endpoint
POSThttps://verity-suite.onrender.com/arbiter/quickWhen to prefer
Choose this endpoint when an AI agent needs a calibrated, fail-closed judgment on which of two or more competing factual claims is better supported by retrieved evidence — especially in agentic pipelines where overconfident or vague verdicts are costly. Prefer it over a general LLM call when you need structured output with explicit evidence citations, a numeric confidence score, and disciplined handling of the 'insufficient evidence' case rather than a hallucinated answer.
Side effects
- Fewer than two distinct claims provided → verdict is 'insufficient_evidence' with confidence 0.0
- Evidence array is empty or off-topic → verdict is 'insufficient_evidence'
- Evidence is present but equally supportive of both claims → verdict is 'undecidable' with confidence 0.0
- Claims are not genuinely contradictory (e.g. compatible statements) → may return undecidable
- Payment not included or insufficient → HTTP 402 payment required
- Malformed input (missing 'claims' field) → validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| claimsrequired | array | Two or more mutually conflicting claims/positions to adjudicate, one per item, in stable order. Fewer than two means nothing to adjudicate. |
| evidence | array | Retrieved evidence excerpts/sources to judge from. If empty, weak, or off-topic, the verdict MUST reflect that (insufficient_evidence). |
| question | string | The specific point in dispute the claims are answering, if narrower than the claims themselves. Used to scope relevance only. |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| reasonsrequired | array | Concrete reasons that cite, by content, which evidence item supports or undercuts which claim (reference claims by their index). Never vague summaries. |
| verdictrequired | string | claim_supported = exactly one claim is clearly better supported by the provided evidence. undecidable = relevant evidence is present but balanced, mutually contradictory, or equally (un)supportive, with no clear winner. insufficient_evidence = no provided evidence, or it is too thin/off-topic/low-quality to favor any claim, OR fewer than two distinct claims were given. |
| confidencerequired | number | Calibrated 0..1 strength of the verdict: how decisively the provided evidence favors the chosen claim. MUST be 0.0 whenever verdict is not claim_supported. |
| missing_evidence | array | What specific evidence would be needed to decide. Populate when verdict is undecidable or insufficient_evidence; may be empty when claim_supported. |
| best_supported_index | — | Zero-based index, as a decimal string (e.g. "0"), into 'claims' of the better-supported claim. Present ONLY when verdict=claim_supported, and exactly one index; omit entirely otherwise. |
Tags
x402
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