clinical-trials-search

clinical-trials-search is a skill for Claude Code from yorkeccak/scientific-skills. It costs 28 tokens per session (1,239 once invoked), scanned B, a copy of clinical-trials-search, MIT.

A search tool for ClinicalTrials.gov, the public database of registered clinical studies. It accepts ordinary-language questions and returns trial details such as conditions, treatments, phases, and outcomes.

In plain words
What is it for?
Finding relevant clinical trials, checking enrollment information, and reviewing study results from the ClinicalTrials.gov database.
Why use it?
It removes the need to learn ClinicalTrials.gov's search fields or construct complex filters.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: reads .claude/ paths.

Part of the scientific-skills plugin — 13 skills shipped together

Good fit Finding relevant clinical trials, checking enrollment information, and reviewing study results from the ClinicalTrials.gov database.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/yorkeccak/scientific-skills/clinical-trials-search
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 yorkeccak/scientific-skills --skill clinical-trials-search
Clone the repo
git clone --depth 1 https://github.com/yorkeccak/scientific-skills

Made for: Claude Code.

Or install scientific-skills, the plugin that ships this one along with the rest of its 13 skills.

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 clinical-trials-search

README.md
[![agentmods](https://agentmods.dev/badge/skills/yorkeccak/scientific-skills/clinical-trials-search/github.svg)](https://agentmods.dev/skills/yorkeccak/scientific-skills/clinical-trials-search)
Your own site
<a href="https://agentmods.dev/skills/yorkeccak/scientific-skills/clinical-trials-search"><img src="https://agentmods.dev/badge/skills/yorkeccak/scientific-skills/clinical-trials-search/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 clinical-trials-search

Your own site · 80×15
<a href="https://agentmods.dev/skills/yorkeccak/scientific-skills/clinical-trials-search"><img src="https://agentmods.dev/badge/skills/yorkeccak/scientific-skills/clinical-trials-search.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 28 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,239 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin 100% copy Near-identical to another mod 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 $0.00028 $0.01239
Opus 5 $0.00014 $0.00620
Sonnet 5 $0.00006 $0.00248
Haiku 4.5 $0.00003 $0.00124

Measured 12d ago against content hash 22de203b8391, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade B, and why

clinical-trials-search scanned grade B 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.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/search.mjs), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

CLINICAL_TRIALS_SCRIPT=$(find ~/.claude/plugins/cache -name "search" -path "*/clinical-trials-search/*/scripts/*" -type f 2>/dev/null | head -1)
Origin

This is a copy

100% identical to clinical-trials-search — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/clinical-trials-search/SKILL.md · 212 lines

How it starts

The opening of the file, as written. The whole thing — 212 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Search the complete ClinicalTrials.gov database of clinical studies using natural language queries powered by Valyu's semantic search API.

Why This Skill is Powerful

  • No API Parameter Parsing: Just pass natural language queries directly - no need to construct complex search parameters
  • Semantic Search: Understands the meaning of your query, not just keyword matching
  • Full-Text Access: Returns complete trial information including phases, conditions, interventions, and outcomes
  • Image Links: Includes data visualizations when available
  • Comprehensive Coverage: Access to all ClinicalTrials.gov data

Requirements

  1. Node.js 18+ (uses built-in fetch)
  2. Valyu API key from https://platform.valyu.ai ($10 free credits)

CRITICAL: Script Path Resolution

The scripts/search commands in this documentation are relative to this skill's installation directory.

Before running any command, locate the script using:

CLINICAL_TRIALS_SCRIPT=$(find ~/.claude/plugins/cache -name "search" -path "*/clinical-trials-search/*/scripts/*" -type f 2>/dev/null | head -1)

Then use the full path for all commands:

$CLINICAL_TRIALS_SCRIPT "CAR-T cell therapy trials" 15

API Key Setup Flow

When you run a search and receive "setup_required": true, follow this flow:

  1. Ask the user for their API key: "To search ClinicalTrials.gov, I need your Valyu API key. Get one free ($10 credits) at https://platform.valyu.ai"

  2. Once the user provides the key, run:

    scripts/search setup <api-key>
    
  3. Retry the original search.

When to Use This Skill

  • Finding ongoing and completed clinical trials
  • Identifying trial eligibility criteria
  • Recruiting status and enrollment information
  • Comparing treatment approaches in trials
  • Patient recruitment and enrollment research
  • Outcomes and safety data from trials

Output Format

{
  "success": true,
  "type": "clinical_trials_search",
  "query": "CAR-T cell therapy trials",
  "result_count": 10,
  "results": [
    {
      "title": "Trial Title",
      "url": "https://clinicaltrials.gov/...",
      "content": "Trial details, phase, conditions, outcomes...",
      "source": "clinical-trials",
      "relevance_score": 0.95,
      "images": []
    }
  ],
  "cost": 0.025
}

Read the full file on GitHub · 212 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 · 212 lines · 28 tokens per session scan B 22de203b8391

Subscribe to this mod's changes

clinical-trials-search is a skill published in the GitHub repository yorkeccak/scientific-skills (61 stars, last pushed 7mo ago), licensed MIT. It adds 28 tokens to every session and 1,239 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it B with 1 finding (reads agent configuration directories). It is 100% identical to clinical-trials-search, differing in 0 lines, and is treated as a copy.