Citation Verifier — Existence-Verify a Bibliography Against Public Scholarly APIs

The headline existence-verification skill: given a bibliography in any common form, it proves entry-by-entry whether each reference actually exists by querying four keyless public scholarly APIs, then maps each result to the canonical AlterLab citation-hallucination taxonomy. It is the deterministic, network-grounded companion to the LLM-driven integrity_verification_agent — where that agent uses WebSearch + judgment, this skill uses authoritative API records and a reproducible Python script, so the same input always yields the same verdicts.

Quick Start

Verify the citations in references.bib
Check whether these DOIs resolve to the papers I cited
Audit my bibliography for fabricated / hallucinated references
Does this reference list contain any fake citations or retractions?