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LexRails CFR Citation Validator
x402
LexRails CFR Citation Validator is a paid API for AI agents from lex.chainverdict.xyz, paid per call via x402, $0.009/call, status unknown (last checked 2026-09-14).
Validates whether a given Code of Federal Regulations (CFR) title citation is real and correctly formed, returning a deterministic true/false verdict
Price / call$0.009
Success—
StatusUnknown
How this service works
Validate a CFR citation structurally (title, part, section format).
Output
A JSON object containing a 'valid' boolean indicating whether the provided CFR title citation is legitimate, plus an '_attestation' object providing a cryptographic or metadata proof of the check result for auditability.
Example use cases
Hallucination audit in AI legal drafts
“I just had an AI draft a regulatory compliance memo and it cites '45 CFR Part 164' — can you verify that's a real CFR citation and not something it made up?”
Regulatory document pre-publication check
“Before we publish this policy brief, check that '40 CFR Part 60' is a legitimate Code of Federal Regulations title so we don't embarrass ourselves with a fake citation.”
Automated citation guardrail for legal agents
“My agent is writing regulatory summaries and I want to make sure every CFR reference it produces is real — can you validate '29 CFR Part 1926' for me?”
Technical details
Endpoint
GEThttps://lex.chainverdict.xyz/v1/cfr/validateWhen to prefer
Choose this endpoint when you need a deterministic, paid-attestation check specifically for Code of Federal Regulations (CFR) citations — particularly in AI agent pipelines prone to hallucinating regulatory references. Prefer it over general web searches when you need a machine-verifiable boolean result with an attestation object suitable for audit trails, or when building automated guardrails that must flag fabricated CFR citations before they reach a human or published document.
Side effects
- Missing required 'title' parameter returns an error response
- Ambiguous or malformed citation string may return valid:false even for real regulations
- Payment failure via x402 results in 402 response and no validation result
- Network timeout or service unavailability returns no result
- Non-CFR legal citation formats (e.g. U.S.C. sections) may not be supported
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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