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paper-fetch

Name: paper-fetch (Claude Skill)
Author: Agents365-ai

제작: Agents365-ai · Agents365-ai/paper-fetch

Download open-access PDFs by DOI — pulls from Unpaywall, arXiv, PMC, bioRxiv. Legal, multi-source, built for research workflows.

Give it a DOI or citation; it finds a legally free version (preprint, PMC, institutional open access) and downloads the PDF. Falls back across Unpaywall, arXiv, PMC, and bioRxiv. No paywall bypass, no piracy — just making existing open-access options easier.

▶ 데모 보기 📦 설치 💡 사용 사례

왜 쓰나요

핵심 기능

DOI → PDF resolution across 4+ legal sources
Unpaywall integration for OA detection
arXiv / bioRxiv / PMC direct fetching
Multi-platform (Claude Code, generic Agent Skill)
Clear licensing respect — no sci-hub, no pirated content

라이브 데모

실제 사용 모습

paper-fetch-skill.replay ▶ 준비됨

0/0

설치

작성자 저장소 · Claude Skills 공식 문서

사용 사례

실전 활용법: paper-fetch

Pull all PDFs for a literature review reading list

👤 Researchers, grad students, science writers ⏱ ~15 min beginner

언제 쓸까: You have 40 DOIs from a literature search and want to skim them without 40 browser clicks.

흐름

Hand over the list

Use paper-fetch. Here are 40 DOIs. Download the OA version of each to ~/papers/lit-review/.✓ 복사됨

→ Progress per DOI; summary of found/unfound
Handle misses

For ones not found, tell me what's available (abstract-only? preprint missing?).✓ 복사됨

→ Status per miss
Index the results

Make an index.md with title, year, and file path per downloaded paper.✓ 복사됨

→ Browsable index

결과: A local folder of PDFs you can actually search.

함정

Some papers aren't legally OA anywhere — Skill reports the gap; request via your library's ILL for those

함께 쓰기: filesystem

Chase citations one hop at a time

👤 Deep researchers following reference chains ⏱ ~20 min intermediate

언제 쓸까: You found a good paper and want the most-cited works it references.

흐름

Start with the seed

Use paper-fetch. Download this paper [DOI] and list its top-10 most-cited references.✓ 복사됨

→ Paper downloaded; referenced DOIs listed
Fetch the next ring

Download those 10 too.✓ 복사됨

→ Batch download

결과: A mini research trail in your file system.

함께 쓰기: arxiv

조합

다른 MCP와 조합해 10배 효율

paper-fetch-skill + arxiv

Prefer arXiv for preprints, fall back to Unpaywall for journal OA

Prefer arXiv preprints when present; otherwise use Unpaywall.✓ 복사됨

paper-fetch-skill + filesystem

Organized local library

Save to ~/papers/<year>/<first-author>/✓ 복사됨

paper-fetch-skill + infinite-gratitude-skill

Multi-agent research with real PDFs

Dojo explorer uses paper-fetch to ground claims in actual papers.✓ 복사됨

도구

이 MCP가 노출하는 것

도구	입력	언제 호출	비용
fetch_by_doi	DOI	Per paper	1-3 API lookups
batch_fetch	DOI list	Lit reviews	N * lookups
resolve_citation	free-text citation	Starting from citation text	Crossref + Unpaywall

비용 및 제한

운영 비용

API 쿼터: Unpaywall 100k/day (with email); arXiv and PMC are generous
호출당 토큰: Low
금액: Free
팁: Batch DOIs; respect rate limits to avoid being blocked.

보안

권한, 시크릿, 파급범위

자격 증명 저장: Unpaywall email (not a secret) in env var

데이터 외부 송신: Unpaywall, arXiv, PMC, bioRxiv APIs only

This skill only retrieves legally open-access content. Do not modify it to bypass paywalls; respect publisher licensing.

문제 해결

자주 발생하는 오류와 해결

PDF not found for a DOI you know is OA

Unpaywall occasionally lags; check oadoi.org directly or wait a day

확인: curl https://api.unpaywall.org/v2/<DOI>[email protected]

Rate limited

Space batches out; use the skill's rate-limit-aware batch mode

Wrong PDF downloaded (supplementary instead of main)

Some sources return supplements; rerun with prefer-main flag

대안

paper-fetch 다른 것과 비교

대안	언제 쓰나	단점/장점
arxiv MCP	You only need arXiv, nothing else	Narrower scope
Manual browser + Zotero	Small reading lists	Tedious at scale