Literature Review
neflibata-feng/MyArxiv-Agent
Conduct comprehensive, systematic literature reviews using multiple academic databases (PubMed, arXiv, bioRxiv, Semantic Scholar, etc.).
Search 10 academic paper databases via REST APIs for research papers, preprints, and scholarly articles.
Install Paper Lookup
$ npx skills add zLanqing/codex-claude-academic-skills --skill paper-lookup -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install zLanqing/codex-claude-academic-skills paper-lookup --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/zLanqing/codex-claude-academic-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/scientific-toolkit-skill/references/scientific-skills/paper-lookup .claude/skills/paper-lookup && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "paper-lookup" agent skill from https://github.com/zLanqing/codex-claude-academic-skills/tree/main/scientific-toolkit-skill/references/scientific-skills/paper-lookup into .claude/skills/paper-lookup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "paper-lookup", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/zLanqing/codex-claude-academic-skills/tree/main/scientific-toolkit-skill/references/scientific-skills/paper-lookupType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add zLanqing/codex-claude-academic-skills --skill paper-lookup -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install zLanqing/codex-claude-academic-skills paper-lookup --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/zLanqing/codex-claude-academic-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/scientific-toolkit-skill/references/scientific-skills/paper-lookup .agents/skills/paper-lookup && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "paper-lookup" agent skill from https://github.com/zLanqing/codex-claude-academic-skills/tree/main/scientific-toolkit-skill/references/scientific-skills/paper-lookup into .agents/skills/paper-lookup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "paper-lookup", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add zLanqing/codex-claude-academic-skills --skill paper-lookup -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install zLanqing/codex-claude-academic-skills paper-lookup --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/zLanqing/codex-claude-academic-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/scientific-toolkit-skill/references/scientific-skills/paper-lookup .cursor/skills/paper-lookup && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "paper-lookup" agent skill from https://github.com/zLanqing/codex-claude-academic-skills/tree/main/scientific-toolkit-skill/references/scientific-skills/paper-lookup into .cursor/skills/paper-lookup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "paper-lookup", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/zLanqing/codex-claude-academic-skills.git --path scientific-toolkit-skill/references/scientific-skills/paper-lookup--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add zLanqing/codex-claude-academic-skills --skill paper-lookup -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install zLanqing/codex-claude-academic-skills paper-lookup --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/zLanqing/codex-claude-academic-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/scientific-toolkit-skill/references/scientific-skills/paper-lookup .gemini/skills/paper-lookup && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "paper-lookup" agent skill from https://github.com/zLanqing/codex-claude-academic-skills/tree/main/scientific-toolkit-skill/references/scientific-skills/paper-lookup into .gemini/skills/paper-lookup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "paper-lookup", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install zLanqing/codex-claude-academic-skills paper-lookupInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add zLanqing/codex-claude-academic-skills --skill paper-lookup -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/zLanqing/codex-claude-academic-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/scientific-toolkit-skill/references/scientific-skills/paper-lookup .github/skills/paper-lookup && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "paper-lookup" agent skill from https://github.com/zLanqing/codex-claude-academic-skills/tree/main/scientific-toolkit-skill/references/scientific-skills/paper-lookup into .github/skills/paper-lookup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "paper-lookup", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add zLanqing/codex-claude-academic-skills --skill paper-lookup -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install zLanqing/codex-claude-academic-skills paper-lookup --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/zLanqing/codex-claude-academic-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/scientific-toolkit-skill/references/scientific-skills/paper-lookup .opencode/skills/paper-lookup && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "paper-lookup" agent skill from https://github.com/zLanqing/codex-claude-academic-skills/tree/main/scientific-toolkit-skill/references/scientific-skills/paper-lookup into .opencode/skills/paper-lookup/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "paper-lookup", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
paper-lookup- GitHub stars
- 4.7k
- Used in
- 2 other repos
- Token cost
- ~2.4k tokens
- SKILL.md length
- 1,128 words
- Files
- 11 (incl. references)
- Skills in repo
- 17
- Repo updated
- First seen
- Licence
- MIT
At a glance
Search 10 academic paper databases via REST APIs for research papers, preprints, and scholarly articles.
- Works in 5 steps: Understand the query -- What is the user… → Select database(s) -- Use the database… → Read the reference file -- Each database… → …
- Searching for papers
- SKILL.md covers Core Workflow, Database Selection Guide, Common Identifier Formats and API Keys and Access, plus 3 more sections
- Needs NCBI_API_KEY and CORE_API_KEY
What it does
Paper Lookup is an agent skill from zLanqing/codex-claude-academic-skills. Search 10 academic paper databases via REST APIs for research papers, preprints, and scholarly articles. Covers PubMed, PMC (full text), bioRxiv, medRxiv, arXiv, OpenAlex, Crossref, Semantic Scholar, CORE, Unpaywall. Use when searching for papers, citations, DOI/PMID lookups, abstracts, full text, open access, preprints, citation graphs, author search, or any scholarly literature query. Triggers on mentions of any supported database or requests like "find papers on X" or "look up this DOI".
Its SKILL.md is about 2.4k tokens, which your agent loads only when the skill is triggered. The skill folder holds 11 other files, including reference files (for example `references/arxiv.md`, `references/biorxiv.md` and `references/core.md`).
It sits in Research & Science, covering Academic paper search. It works with Semantic Scholar, arXiv and PubMed. The repository describes itself as: 本仓库包含三个面向学术科研人员的Skills，覆盖从文献阅读、论文写作到科学计算的完整研究工作流。office-academic-skill 负责论文阅读报告与学术 PPT/Word 文档生成；research-writing-skill 提供论文写作、润色与审稿回复辅助；scientific-toolkit-skill 整合 MATLAB/Python… The licence is MIT.
When your agent uses it
- Searching for papers
- DOI/PMID lookups
- Citation graphs
- Any scholarly literature query
Example prompts
- “find papers on X”
- “look up this DOI”
- “/paper-lookup”
Requirements
- A credential in NCBI_API_KEY
- A credential in CORE_API_KEY
Workflow steps
5 steps, taken from the first numbered list in SKILL.md.
- Understand the query -- What is the user looking for? A specific paper by DOI? Papers on a topic? An author's publications? Open access…
- Select database(s) -- Use the database selection guide below. Many queries benefit from hitting multiple databases -- for example…
- Read the reference file -- Each database has a reference file in references/ with endpoint details, query formats, and example calls. Read…
- Make the API call(s) -- See the Making API Calls section below for which HTTP fetch tool to use on your platform.
- Return results -- Always return
What it can do on your machine
Read from SKILL.md and the folder at commit 7ed6377. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
ncbi.nlm.nih.govcore.ac.uksemanticscholar.orgopenalex.org
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names these keys or tokens, usually read from environment variables:
NCBI_API_KEYCORE_API_KEYS2_API_KEYOPENALEX_API_KEY
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Paper Lookup loads about 2.4k tokens when it runs, and up to ~13k if it reads all its reference files. Until then it costs about 127 tokens; SKILL.md has 1,128 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check: notes
The automated check noted patterns worth knowing about, such as sudo or a known installer.
- NoteMentions a .env fileSKILL.md:106
2. **Fall back to `.env`** -- check `.env` in the current working directory.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from zLanqing/codex-claude-academic-skills at commit 7ed6377, republished under its MIT licence (© zLanqing). 1,128 words, ~2,409 tokens.
Download SKILL.mdSave it as
.claude/skills/paper-lookup/SKILL.md (or your agent's skills folder). This skill also uses 10 other files; get the full folder from GitHub.- name
- paper-lookup
- description
- Search 10 academic paper databases via REST APIs for research papers, preprints, and scholarly articles. Covers PubMed, PMC (full text), bioRxiv, medRxiv, arXiv, OpenAlex, Crossref, Semantic Scholar, CORE, Unpaywall. Use when searching for papers, citations, DOI/PMID lookups, abstracts, full text, open access, preprints, citation graphs, author search, or any scholarly literature query. Triggers on mentions of any supported database or requests like "find papers on X" or "look up this DOI".
- metadata.skill-author
- K-Dense Inc.
Paper Lookup
You have access to 10 academic paper databases through their REST APIs. Your job is to figure out which database(s) best serve the user's query, call them, and return the results.
Core Workflow
Understand the query -- What is the user looking for? A specific paper by DOI? Papers on a topic? An author's publications? Open access PDFs? Full text? This determines which database(s) to hit.
Select database(s) -- Use the database selection guide below. Many queries benefit from hitting multiple databases -- for example, searching PubMed for papers and then checking Unpaywall for open access copies.
Read the reference file -- Each database has a reference file in
references/with endpoint details, query formats, and example calls. Read the relevant file(s) before making API calls.Make the API call(s) -- See the Making API Calls section below for which HTTP fetch tool to use on your platform.
Return results -- Always return:
- The raw JSON (or parsed XML for arXiv) response from each database
- A list of databases queried with the specific endpoints used
- If a query returned no results, say so explicitly rather than omitting it
Database Selection Guide
Match the user's intent to the right database(s).
By Use Case
| User is asking about... | Primary database(s) | Also consider |
|---|---|---|
| Papers on a biomedical topic | PubMed | Semantic Scholar, OpenAlex |
| Full text of a biomedical article | PMC | CORE |
| Biology preprints | bioRxiv | Semantic Scholar, OpenAlex |
| Health/medical preprints | medRxiv | Semantic Scholar, OpenAlex |
| Physics, math, or CS preprints | arXiv | Semantic Scholar, OpenAlex |
| Papers across all fields | OpenAlex | Semantic Scholar, Crossref |
| A specific paper by DOI | Crossref | Unpaywall, Semantic Scholar |
| Open access PDF for a paper | Unpaywall | CORE, PMC |
| Citation graph (who cites whom) | Semantic Scholar | OpenAlex |
| Author's publications | Semantic Scholar | OpenAlex |
| Paper recommendations | Semantic Scholar | -- |
| Full text (any field) | CORE | PMC (biomedical only) |
| Journal/publisher metadata | Crossref | OpenAlex |
| Funder information | Crossref | OpenAlex |
| Convert between PMID/PMCID/DOI | PMC (ID Converter) | Crossref |
| Recent preprints by date | bioRxiv, medRxiv | arXiv |
Cross-Database Queries
| User is asking about... | Databases to query |
|---|---|
| Everything about a paper (metadata + citations + OA) | Crossref + Semantic Scholar + Unpaywall |
| Comprehensive literature search | PubMed + OpenAlex + Semantic Scholar |
| Find and read a paper | PubMed (find) + Unpaywall (OA link) + PMC or CORE (full text) |
| Preprint and its published version | bioRxiv/medRxiv + Crossref |
| Author overview with citation metrics | Semantic Scholar + OpenAlex |
When a query spans multiple needs (e.g., "find papers about CRISPR and get me the PDFs"), query the relevant databases in parallel.
Common Identifier Formats
Different databases use different identifier systems. If a query fails, the identifier format may be wrong.
| Identifier | Format | Example | Used by |
|---|---|---|---|
| DOI | 10.xxxx/xxxxx | 10.1038/nature12373 | All databases |
| PMID | Integer | 34567890 | PubMed, PMC, Semantic Scholar |
| PMCID | PMC + digits | PMC7029759 | PMC, Europe PMC |
| arXiv ID | YYMM.NNNNN | 2103.15348 | arXiv, Semantic Scholar |
| OpenAlex ID | W + digits | W2741809807 | OpenAlex |
| Semantic Scholar ID | 40-char hex | 649def34f8be... | Semantic Scholar |
| ORCID | 0000-XXXX-XXXX-XXXX | 0000-0001-6187-6610 | OpenAlex, Crossref |
| ISSN | XXXX-XXXX | 0028-0836 | Crossref, OpenAlex |
Cross-referencing IDs: Semantic Scholar accepts DOI, PMID, PMCID, and arXiv ID via prefixes (e.g., DOI:10.1038/nature12373, PMID:34567890, ARXIV:2103.15348). OpenAlex accepts DOI and PMID via prefixes (doi:10.1038/..., pmid:34567890). Use the PMC ID Converter to translate between PMID, PMCID, and DOI.
API Keys and Access
Most of these databases are fully open. A few benefit from API keys for higher rate limits.
Databases requiring or benefiting from API keys
| Database | Env Variable | Required? | Registration |
|---|---|---|---|
| NCBI (PubMed, PMC) | NCBI_API_KEY | No (3 req/s without, 10 with) | https://www.ncbi.nlm.nih.gov/account/settings/ |
| CORE | CORE_API_KEY | Yes for full text | https://core.ac.uk/services/api |
| Semantic Scholar | S2_API_KEY | No (shared pool without) | https://www.semanticscholar.org/product/api#api-key-form |
| OpenAlex | OPENALEX_API_KEY | Recommended | https://openalex.org/settings/api |
Fully open databases (no key needed)
| Database | Notes |
|---|---|
| bioRxiv / medRxiv | No auth, no documented rate limits |
| arXiv | No auth, max 1 request per 3 seconds |
| Crossref | No auth; add mailto param for polite pool (2x rate limit) |
| Unpaywall | No auth; requires email parameter |
Loading API keys
- Check the environment first -- the key may already be exported (e.g.,
$NCBI_API_KEY). - Fall back to
.env-- check.envin the current working directory. - Proceed without -- most APIs still work at lower rate limits. Tell the user which key is missing and how to get one.
Show full SKILL.md (458 more words)Show less
Making API Calls
Use your environment's HTTP fetch tool to call REST endpoints:
| Platform | HTTP Fetch Tool | Fallback |
|---|---|---|
| Claude Code | WebFetch | curl via Bash |
| Gemini CLI | web_fetch | curl via shell |
| Windsurf | read_url_content | curl via terminal |
| Cursor | No dedicated fetch tool | curl via run_terminal_cmd |
| Codex CLI | No dedicated fetch tool | curl via shell |
| Cline | No dedicated fetch tool | curl via execute_command |
If the fetch tool fails, fall back to curl via whatever shell tool is available.
Special cases
- arXiv returns Atom XML, not JSON. Parse it or use
curland extract the relevant fields. Consider piping through a simple parser if available. - PMC eFetch returns JATS XML for full text. This is expected -- full text articles are in XML format.
- Crossref and Unpaywall benefit from including a
mailtoparameter or email for the polite/fast pool.
Request guidelines
- For NCBI APIs (PubMed, PMC): max 3 req/sec without key, 10 with key. Make requests sequentially.
- For arXiv: max 1 request every 3 seconds. Be patient.
- For Crossref: 5 req/sec (public), 10 req/sec (polite pool with
mailto). - For other APIs with no strict limits, you can query multiple databases in parallel.
- If you get HTTP 429 (rate limit), wait briefly and retry once.
Error recovery
- Check the identifier format -- use the Common Identifier Formats table. A PMID won't work in arXiv, an arXiv ID won't work in PubMed directly.
- Try alternative identifiers -- if a DOI fails in one database, try the title or PMID instead.
- Try a different database -- if PubMed returns nothing for a CS paper, try Semantic Scholar or OpenAlex.
- Report the failure -- tell the user which database failed, the error, and what you tried instead.
Output Format
Structure your response like this:
## Databases Queried
- **PubMed** -- esearch + esummary for "CRISPR gene therapy"
- **Unpaywall** -- DOI lookup for 10.1038/...
## Results
### PubMed
[raw JSON response or formatted results]
### Unpaywall
[raw JSON response]If results are very large, present the most relevant portion and note that more data is available. But default to showing the full raw JSON -- the user asked for it.
Available Databases
Read the relevant reference file before making any API call.
Biomedical Literature
| Database | Reference File | What it covers |
|---|---|---|
| PubMed | references/pubmed.md | 37M+ biomedical citations, abstracts, MeSH terms |
| PMC | references/pmc.md | 10M+ full-text biomedical articles (JATS XML), ID conversion |
Preprint Servers
| Database | Reference File | What it covers |
|---|---|---|
| bioRxiv | references/biorxiv.md | Biology preprints (browse by date/DOI, no keyword search) |
| medRxiv | references/medrxiv.md | Health sciences preprints (browse by date/DOI, no keyword search) |
| arXiv | references/arxiv.md | Physics, math, CS, biology, economics preprints (keyword search, Atom XML) |
Multidisciplinary Indexes
| Database | Reference File | What it covers |
|---|---|---|
| OpenAlex | references/openalex.md | 250M+ works, authors, institutions, topics, citation data |
| Crossref | references/crossref.md | 150M+ DOI metadata, journals, funders, references |
| Semantic Scholar | references/semantic-scholar.md | 200M+ papers, citation graphs, AI-generated TLDRs, recommendations |
Open Access & Full Text
| Database | Reference File | What it covers |
|---|---|---|
| CORE | references/core.md | 37M+ full texts from OA repositories worldwide |
| Unpaywall | references/unpaywall.md | OA status and PDF links for any DOI |
© zLanqing, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 10 other files (references) in scientific-toolkit-skill/references/scientific-skills/paper-lookup of zLanqing/codex-claude-academic-skills.
- SKILL.md
- references/arxiv.md
- references/biorxiv.md
- references/core.md
- references/crossref.md
- references/medrxiv.md
- references/openalex.md
- references/pmc.md
- references/pubmed.md
- references/semantic-scholar.md
- references/unpaywall.md
Open the folder on GitHubat commit 7ed6377
Used in 2 other repositories
We found 2 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 2 other GitHub owners. This page covers the copy in zLanqing/codex-claude-academic-skills, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Paper Lookup next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Paper Lookup this skillzLanqing/codex-claude-academic-skills | 4.7k | 2 repos | ~2.4k | Automated safety check: Notes | MIT | |
| Literature Reviewneflibata-feng/MyArxiv-Agent | 126 | 20 repos | ~5.9k | Automated safety check: Notes | MIT | |
| Paper Searchopenags/paper-search-mcp | 2.8k | — | ~1.2k | Automated safety check: Notes | MIT | |
| Nature Academic Searchwp-a/nature-academic-search | 304 | — | ~1.4k | Automated safety check: Pass | MIT | |
| Paper Searchopenags/paper-search-mcp | 2.8k | — | ~794 | Automated safety check: Notes | MIT | |
| Nature Academic Searchjing1312/nature-figure-skill | 171 | — | ~1.3k | Automated safety check: Notes | MIT |
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Categories
Questions about Paper Lookup
What does Paper Lookup do?
Search 10 academic paper databases via REST APIs for research papers, preprints, and scholarly articles. Paper Lookup is an agent skill from zLanqing/codex-claude-academic-skills. Search 10 academic paper databases via REST APIs for research papers, preprints, and scholarly articles.
When should I use Paper Lookup?
Paper Lookup fits situations like: searching for papers; DOI/PMID lookups; citation graphs; any scholarly literature query.
How do I install Paper Lookup in Claude Code?
Run `npx skills add zLanqing/codex-claude-academic-skills --skill paper-lookup -a claude-code`. Or copy the skill folder (scientific-toolkit-skill/references/scientific-skills/paper-lookup in zLanqing/codex-claude-academic-skills) into .claude/skills/paper-lookup in your project. Claude Code loads it when a task matches its description.
How do I install Paper Lookup in Codex?
Run `npx skills add zLanqing/codex-claude-academic-skills --skill paper-lookup -a codex`. Or copy the skill folder (scientific-toolkit-skill/references/scientific-skills/paper-lookup in zLanqing/codex-claude-academic-skills) into .agents/skills/paper-lookup in your project. Codex loads it when a task matches its description.
Can I use Paper Lookup in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add zLanqing/codex-claude-academic-skills --skill paper-lookup -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/paper-lookup, .gemini/skills/paper-lookup, .github/skills/paper-lookup and .opencode/skills/paper-lookup in your project.
What does Paper Lookup need to run?
Going by SKILL.md and its folder, Paper Lookup needs credentials named NCBI_API_KEY, CORE_API_KEY, S2_API_KEY and OPENALEX_API_KEY. Our summary lists: A credential in NCBI_API_KEY; A credential in CORE_API_KEY.
Does Paper Lookup access the network?
SKILL.md names 4 domains. As links in the text: ncbi.nlm.nih.gov, core.ac.uk, semanticscholar.org and openalex.org. This is read from the text; nothing was executed.
Is Paper Lookup safe to install?
Our automated static check of SKILL.md found notes only (mentions a .env file), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.
What licence does Paper Lookup use?
Paper Lookup is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Paper Lookup use?
About 2.4k tokens (SKILL.md is roughly 9.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 11k tokens, read only when the agent opens those files.
What are the alternatives to Paper Lookup?
Skills that share tags, products or a category with Paper Lookup: Literature Review (neflibata-feng/MyArxiv-Agent, 126 stars), Paper Search (openags/paper-search-mcp, 2.8k stars), Nature Academic Search (wp-a/nature-academic-search, 304 stars) and Paper Search (openags/paper-search-mcp, 2.8k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Paper Lookup?
zLanqing (a GitHub user) maintains it in zLanqing/codex-claude-academic-skills, which has 4,700 GitHub stars. The repository holds 17 skills in this directory. The repository was last updated on May 14, 2026.
Source: zLanqing/codex-claude-academic-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.