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Verity Suite Citation Quick
x402
Verity Suite Citation Quick is a paid API for AI agents from suite.veritylayer.dev, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-14).
Given a factual statement, retrieves and evaluates supporting sources, returning a calibrated verdict, support score, citations, and a cryptographically signed receipt.
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 enum (supported, partially_supported, not_supported, or contradicted), a calibrated 0–1 support score, a list of citations, reasons explaining the verdict (including why sources were rejected), optional caveats about coverage or recency, and an optional Ed25519-signed VerityLayer receipt that can be independently verified.
Example use cases
Fact-checking AI-generated content
“I just got this answer from another AI: 'The average human body contains about 37 trillion cells.' Can you find real supporting sources for that and tell me how strongly they back it up, ideally from biology or medicine?”
Validating a legal claim
“Can you verify whether the statement 'employers in California must provide 30-minute meal breaks for shifts over 5 hours' is supported by authoritative sources — focus on tax law or employment law — and give me a verdict with citations?”
Supporting a research assertion
“I need citations backing up the claim 'sleep deprivation increases cortisol levels in adults' for a report I'm writing. Can you find credible sources and tell me how confidently they establish this, with reasons if any sources were rejected?”
Technical details
Endpoint
POSThttps://suite.veritylayer.dev/cite/quickWhen to prefer
Use this endpoint when an AI agent needs to ground a factual claim in real, retrievable sources and receive a machine-readable verdict with a calibrated confidence score. It is especially valuable when downstream actions depend on the truthfulness of a claim, when a cryptographically signed receipt is needed for audit or accountability, or when a domain-specific focus (e.g. clinical, legal) is required. Prefer it over generic web search when you need structured citation output, a calibrated support score, and a fail-closed trust signal rather than a raw list of search results.
Side effects
- No relevant sources found — returns 'not_supported' verdict with support score near 0
- Statement is ambiguous or too broad — verdict may be 'partially_supported' with low confidence
- Domain hint narrows search too aggressively — relevant sources outside the hint may be missed
- Statement exceeds 2000-character limit — request is rejected
- Signing not configured — receipt field returns null
- Network or upstream search failure — request fails closed rather than returning a false positive
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| statement | string | the factual claim to find supporting sources for |
| domain_hint | — | optional topic/field to focus the search (e.g. 'clinical', 'tax law') |
Tags
x402
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