Finding Open Access Papers
Finding Open Access Papers
Overview
Use Unpaywall to find legally available open access versions of papers that appear to be behind paywalls.
Core principle: Many paywalled papers have free versions (preprints, author manuscripts, institutional repositories). Unpaywall finds them.
When to Use
Use this skill when:
- DOI resolution hits a paywall
- Paper not available in PubMed Central
- Publisher site requires subscription
- Need full text for highly relevant paper (score ≥7)
Use BEFORE giving up on full text access
Unpaywall API
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