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Script Master Labs x402 Fact Check API
x402
Script Master Labs x402 Fact Check API is a paid API for AI agents from mcp-x402.onrender.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Verifies a factual claim against U.S. federal data sources, returning a fact-check result, with payment settled in USDC on Base via x402.
Price / call$0.001
Success—
StatusUnknown
How this service works
Pay-per-call crypto, RWA, federal, SEC, Section 8/HUD housing, and compliance APIs via x402. Primary: USDC on Base (eip155:8453). Also accepts Global Dollar (USDG) on Robinhood Chain (eip155:4663) via sovereign X-PAYMENT-TX. Hyphen routes only (e.g. /x402/gas-tracker, /x402/pha-lookup, /x402/sec-8k). MARKETPLACE REVIEW: use free /x402/playground/* (no key, no payment). Production /x402/* returns 402 unless paid via x402 or X-Api-Market-Key / X-API-Key from seller dashboard.
Output
A fact-check assessment indicating whether the submitted claim is supported, contradicted, or unverifiable based on U.S. federal data, likely including a verdict, confidence level, and relevant sourcing or context from official government datasets. Payment of $0.15 USDC is charged per call via x402 on Base.
Example use cases
Verify political spending claim
“Can you check whether this claim is accurate according to U.S. federal data: 'The Department of Defense received over $800 billion in the 2023 federal budget' — I want an authoritative verdict before I include it in my report.”
Validate public health statistic
“I'm drafting a health policy brief and want to confirm this before publishing — can you fact-check the claim that 'More than 40% of American adults are classified as obese according to official U.S. health data'?”
Confirm economic figure accuracy
“Someone cited this statistic in a debate and I want to know if it holds up — can you verify using federal sources whether 'U.S. inflation peaked at over 9% in 2022' is actually supported by official government data?”
Technical details
Endpoint
GEThttps://mcp-x402.onrender.com/x402/fact-checkWhen to prefer
Use this endpoint when you need to verify a specific factual claim against authoritative U.S. government data sources and are willing to pay $0.15 USDC per check. Ideal for agents working in journalism, policy research, education, or compliance that need a quick, authoritative verdict on U.S.-federal-scope claims. Prefer this over general web search when you want structured fact-check output grounded in official federal data rather than scraped opinion or news articles.
Side effects
- Missing required 'claim' parameter returns a 400 or validation error
- Claim is too vague or ambiguous for federal data to resolve — may return inconclusive result
- Payment not authorized or x402 header missing — returns 402 Payment Required
- Domain value not recognized — may fall back to general lookup or return an error
- Federal data source for the specific domain is unavailable — may return partial or no result
- Server timeout on Render free-tier infrastructure — may return 503 or hang
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | — |
Output
Schema · Response
{
"example": {}
}Tags
x402
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