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LexRails ECLI Legal Citation Validator
x402
LexRails ECLI Legal 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 2026-09-15).
Deterministically validates whether a given ECLI (European Case Law Identifier) legal citation is real and not fabricated
Price / call$0.009
Success—
StatusUnknown
How this service works
Validate a European ECLI identifier (format, jurisdiction, year).
Output
Returns a JSON object with a 'valid' boolean indicating whether the ECLI citation is real and verified, plus an '_attestation' object providing cryptographic or deterministic proof of the check result.
Example use cases
AI legal brief hallucination check
“I just drafted a legal brief with an AI and it cited ECLI:NL:HR:2019:1290 — can you verify that's a real case and not fabricated?”
Research assistant citation audit
“Before I submit this research paper, can you confirm that ECLI:EU:C:2018:385 is a legitimate European court case citation?”
Automated contract review pipeline
“We're running an automated contract analysis tool and it generated ECLI:DE:BVerfG:2020:456 as a reference — please validate whether this citation actually exists.”
Technical details
Endpoint
GEThttps://lex.chainverdict.xyz/v1/ecli/validateWhen to prefer
Choose this endpoint when you need deterministic, paid-attestation verification of ECLI legal citations — especially to catch AI-hallucinated case references before they appear in legal documents, research papers, or automated legal workflows. Prefer this over general web search when you need a structured boolean validity signal with an attestation, not just a search result.
Side effects
- Missing or malformed 'id' parameter returns an error
- Invalid ECLI format string may return valid:false or a parsing error
- Payment failure via x402 protocol blocks the call
- Unknown or unsupported jurisdiction prefix may not be resolvable
- Network timeout or upstream legal database unavailability
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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