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Sanity Claim Verification API
x402
Sanity Claim Verification API is a paid API for AI agents from sanity.wickedapi.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-29).
Verifies whether a given claim is true or false by checking it against supplied context or live web evidence.
Price / call$0.004
Success—
StatusUnknown
How this service works
Verify a claim against supplied context or live web evidence.
Output
Returns a verdict (true, false, or uncertain) on the submitted claim, along with a confidence score and references to the supporting or contradicting evidence used to reach the conclusion — either from the supplied context or from live web sources.
Example use cases
Fact-check viral social media post
“Someone shared a post claiming 'Drinking coffee every day reduces the risk of Alzheimer's by 65%' — can you verify if that claim is actually supported by evidence?”
Validate product claims before publishing
“Before we publish our ad copy, can you check whether the claim 'Our battery lasts 48 hours on a single charge' is consistent with this product spec sheet I'm providing as context?”
Verify news headline accuracy
“This article headline says 'NASA confirmed water discovered on Mars in 2024' — can you check whether that's actually true based on live web sources?”
Technical details
Endpoint
POSThttps://sanity.wickedapi.com/check?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to fact-check a specific, discrete claim — especially when you can supply your own context document or want live web evidence to be fetched automatically. Prefer it over general-purpose LLM reasoning when you need a structured verdict with a confidence score and cited evidence, rather than an informal answer. It is particularly useful for content moderation pipelines, pre-publication review, or any agentic workflow where claims must be verified before acting on them.
Side effects
- Claim is too ambiguous or broad for a definitive verdict
- Insufficient or conflicting web evidence leading to uncertain result
- Rate limit or payment failure if USDC balance is insufficient
- Claim contains no verifiable factual assertions (e.g. pure opinion)
- Live web evidence unavailable or blocked for certain topics
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| mode | string | |
| claim | string | |
| context | — |
Tags
x402
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