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x402 tools – US Statute Citation Verifier
x402
x402 tools – US Statute Citation Verifier is a paid API for AI agents from x402-tools-production-2755.up.railway.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-01).
Finds up to 25 US statute citations in a document, checks each exists and is currently in force, and optionally validates quoted passages against the actual statutory text.
Price / call$0.01
Success—
StatusUnknown
How this service works
Use to catch hallucinated or repealed statute citations in a brief, memo or AI answer. Finds up to 25 US statute citations in text, checks each exists and is in force, and checks quoted passages against the section. Not charged if none are found. Data: Open US Law v2026.08 (CC BY 4.0). Not legal advice.
Output
Returns a list of up to 25 detected US statute citations from the input text, each with: whether the citation exists in current US law, whether it is currently in force (not repealed), and optionally whether any quoted passage from the document matches the actual statutory text. Optionally includes the full section text for each citation. Not charged if no citations are found.
Example use cases
Audit AI-generated legal memo
“I just got a legal memo drafted by an AI assistant — can you scan it for fake or repealed statute citations and flag any quoted passages that don't match the actual law? Here's the full text: [memo text]”
Pre-filing brief citation check
“Before I file this brief, can you check all the US statute citations in it to make sure they're real, still in force, and that any quoted sections match the actual statutory text? Here's the brief.”
Verify contract statutory references
“This contract references several federal statutes — can you verify each citation exists, is currently valid law, and that the quoted language matches what the statutes actually say?”
Technical details
Endpoint
GEThttps://x402-tools-production-2755.up.railway.app/tools/statute-verify?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to fact-check US statutory citations in any legal document, AI-generated answer, memo, brief, or contract. It is uniquely suited for catching hallucinated statute numbers and repealed laws — a common failure mode of LLMs in legal contexts. Prefer this over generic web search when you need authoritative, structured validation against a curated US law corpus rather than unstructured results.
Side effects
- No citations found in text — not charged, returns empty result
- Citation exists but has been repealed — flagged as not in force
- Quoted passage does not match actual statutory text — flagged as mismatch
- Text exceeds 100,000 character limit — should use POST endpoint instead
- State-specific citations may require the 'state' parameter to resolve correctly
- Non-US or international statute citations are not supported
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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