Searching Scientific Literature

Searching Scientific Literature is a skill for Claude Code from kthorn/research-superpower. It costs 17 tokens per session (1,591 once invoked), scanned A, original, MIT.

A guide for searching PubMed, a database of biomedical and life-science research papers, with targeted keywords and extracted paper details.

In plain words
What is it for?
Finding papers about diseases, compounds, methods, or techniques, while filtering by dates, authors, journals, or requested data.
Why use it?
It helps turn a broad research question into searches that find useful studies without producing an unmanageable result set.

Skill for Claude Code

Written for Claude Code: when-to-use in frontmatter. Also seen: mentions subagents.

Part of the research-superpower plugin — 10 skills, 1 hook shipped together

Good fit Finding papers about diseases, compounds, methods, or techniques, while filtering by dates, authors, journals, or requested data.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/kthorn/research-superpower/searching-literature
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add kthorn/research-superpower --skill searching-literature
Clone the repo
git clone --depth 1 https://github.com/kthorn/research-superpower

Made for: Claude Code.

Or install research-superpower, the plugin that ships this one along with the rest of its 10 skills, 1 hook.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for Searching Scientific Literature

README.md
[![agentmods](https://agentmods.dev/badge/skills/kthorn/research-superpower/searching-literature/github.svg)](https://agentmods.dev/skills/kthorn/research-superpower/searching-literature)
Your own site
<a href="https://agentmods.dev/skills/kthorn/research-superpower/searching-literature"><img src="https://agentmods.dev/badge/skills/kthorn/research-superpower/searching-literature/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for Searching Scientific Literature

Your own site · 80×15
<a href="https://agentmods.dev/skills/kthorn/research-superpower/searching-literature"><img src="https://agentmods.dev/badge/skills/kthorn/research-superpower/searching-literature.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 17 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,591 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00017 $0.01591
Opus 5 $0.00009 $0.00796
Sonnet 5 $0.00003 $0.00318
Haiku 4.5 $0.00002 $0.00159

Measured 12d ago against content hash c7de90306b99, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

Searching Scientific Literature scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl "https://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi?db=pubmed&term=BTK+inhibitor+selectivity&retmax=100&retmode=json&sort=relevance"
skills/research/searching-literature/SKILL.md · 199 lines

How it starts

The opening of the file, as written. The whole thing — 199 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Searching Scientific Literature

Overview

Search PubMed for scientific literature using optimized queries. Extract metadata and prepare papers for relevance evaluation.

Core principle: Cast a wide enough net to find relevant papers, but use targeted keywords to keep results manageable.

When to Use

Use this skill when:

  • Starting a new research question
  • User asks "find papers about..."
  • Need initial paper set for evaluation
  • Searching for specific methods, compounds, diseases, techniques

Search Strategy

1. Parse User Query

Extract:

  • Keywords: Main concepts (e.g., "BTK inhibitor", "selectivity", "kinase")
  • Data types: What user needs (IC50 values, methods, structures, results)
  • Constraints: Date ranges, specific journals, author names
  • Synonyms: Alternative terms (e.g., "Bruton's tyrosine kinase" = "BTK")

2. Construct PubMed Query

Boolean operators:

  • AND - narrow results (must have both terms)
  • OR - broaden results (either term)
  • NOT - exclude terms

Example queries:

"BTK inhibitor"[Title/Abstract] AND selectivity[Title/Abstract]

("kinase inhibitor" OR "protein kinase") AND (selectivity OR "off-target")

"ibrutinib"[Title/Abstract] AND ("IC50" OR "inhibitory concentration")

Field tags:

  • [Title/Abstract] - search title and abstract only
  • [Title] - title only (more precise)
  • [Author] - specific author
  • [Journal] - specific journal
  • [Date] - date range

3. Execute Search

API endpoint:

https://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi?\
db=pubmed&\
term=YOUR_QUERY&\
retmax=100&\
retmode=json&\
sort=relevance

Parameters:

  • db=pubmed - search PubMed database
  • term= - your query (URL encode spaces and special chars)
  • retmax=100 - max results (start with 100)
  • retmode=json - return JSON
  • sort=relevance - most relevant first (or pub_date for newest)

Example bash:

curl "https://eutils.ncbi.nlm.nih.gov/entrez/eutils/esearch.fcgi?db=pubmed&term=BTK+inhibitor+selectivity&retmax=100&retmode=json&sort=relevance"

Read the full file on GitHub · 199 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 12d ago First seen · 199 lines · 17 tokens per session scan A c7de90306b99

Subscribe to this mod's changes

Searching Scientific Literature is a skill published in the GitHub repository kthorn/research-superpower (124 stars, last pushed 10mo ago), licensed MIT. It adds 17 tokens to every session and 1,591 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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