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Crucible Claim Research & Fact-Check
x402
Crucible Claim Research & Fact-Check is a paid API for AI agents from crucible.unitynodes.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).
Verifies a factual claim against provided evidence text, returning a verdict, confidence score, risk score, cited sources, and per-claim support breakdown.
Price / call$0.05
Success—
StatusUnknown
How this service works
Pay-per-call Web3 agent services: wallet, token and agent security audits; token prices, depeg checks and portfolio valuation; cited fact-checking and source research.
Output
Returns a verdict string (e.g. supported/refuted/inconclusive), a confidence score (0–1), a risk score, an array of cited source objects (url, name, hash), a per-claim evidence breakdown with support ratings and source indices, and a content hash for auditability. Also echoes the original claim.
Example use cases
Verifying a crypto project claim
“Check whether this claim is accurate: 'USDC has never lost its dollar peg.' Here's the evidence: 'In March 2023, USDC briefly depegged to $0.87 following the collapse of Silicon Valley Bank, which held a portion of Circle's reserves.' Give me a verdict and confidence score.”
Fact-checking a DeFi whitepaper assertion
“I need to verify a claim from a DeFi whitepaper — the claim is 'Our protocol has never been exploited since launch in 2021.' The evidence I have is: 'In August 2022, the protocol suffered a $3M exploit due to a reentrancy vulnerability, which was later patched.' Is the claim supported?”
Validating a news story assertion
“Fact-check this statement: 'Bitcoin reached an all-time high of $100,000 in 2024.' The evidence text is: 'Bitcoin surpassed $100,000 for the first time on December 4, 2024, reaching approximately $103,600 on several major exchanges.' What's the verdict and how confident are you?”
Technical details
Endpoint
POSThttps://crucible.unitynodes.com/research/claimWhen to prefer
Choose this endpoint when you need a structured, confidence-scored, source-cited verdict on a specific claim checked against provided evidence text — especially in Web3 or research contexts where auditability (content hash) and cited sourcing matter. Prefer over generic LLM fact-checking when you need a risk score, per-claim evidence breakdown, and cryptographic content hash for verification. Best when you already have evidence text and want a formal verdict rather than open-ended research.
Side effects
- Missing required 'claim' or 'evidence' field returns a 400 validation error
- Insufficient or vague evidence may yield low confidence score and inconclusive verdict
- Payment failure via x402 protocol returns 402 status before processing
- Very long evidence text may time out or be truncated
- Sources array may be empty if no external sources are resolved from the evidence
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| claimrequired | string | Claim to verify |
| evidencerequired | string | Evidence text to check the claim against |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| cost | number | |
| data | object | |
| sources | array | |
| evidence | array | |
| riskScore | number | |
| confidence | number | |
| contentHash | string |
Tags
x402
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