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.
npx skills add wentorai/research-plugins --skill clinicaltrials-api-v2git clone --depth 1 https://github.com/wentorai/research-pluginsWrote 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.
[](https://agentmods.dev/skills/wentorai/research-plugins/clinicaltrials-api-v2)<a href="https://agentmods.dev/skills/wentorai/research-plugins/clinicaltrials-api-v2"><img src="https://agentmods.dev/badge/skills/wentorai/research-plugins/clinicaltrials-api-v2/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.
<a href="https://agentmods.dev/skills/wentorai/research-plugins/clinicaltrials-api-v2"><img src="https://agentmods.dev/badge/skills/wentorai/research-plugins/clinicaltrials-api-v2.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00020 | $0.02174 |
| Opus 5 | $0.00010 | $0.01087 |
| Sonnet 5 | $0.00004 | $0.00435 |
| Haiku 4.5 | $0.00002 | $0.00217 |
Grade A, and why
clinicaltrials-api-v2 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 6d 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://clinicaltrials.gov/api/v2/studies?query.cond=diabetes&query.intr=metformin&pageSize=1&fields=NCTId,BriefTitle,OverallStatus" How it starts
The opening of the file, as written. The whole thing — 217 lines — stays where its author put it; the contents beside it link to each section on GitHub.
ClinicalTrials.gov v2 API Guide
Overview
ClinicalTrials.gov is the world's largest clinical trial registry, maintained by the U.S. National Library of Medicine (NLM) at NIH. It contains over 576,000 study records from 220+ countries covering interventional trials, observational studies, and expanded access programs. The v2 API provides structured JSON access with field-level filtering, cursor-based pagination, and statistics endpoints.
Key v2 improvements over the legacy API: JSON-native responses, sparse field selection via the fields parameter, nextPageToken pagination, and dedicated statistics endpoints. Study data is organized into protocolSection (sponsor-submitted) and derivedSection (NLM-computed).
Authentication
No authentication required. All endpoints are publicly accessible without API keys or registration. Users should comply with NCBI usage policies and maintain reasonable request rates.
Core Endpoints
Search Studies
- URL:
GET https://clinicaltrials.gov/api/v2/studies - Parameters:
| Parameter | Type | Required | Description |
|---|---|---|---|
| query.term | string | No | Free-text search across all fields |
| query.cond | string | No | Condition or disease filter |
| query.intr | string | No | Intervention or treatment filter |
| query.spons | string | No | Sponsor or collaborator filter |
| filter.overallStatus | string | No | RECRUITING, COMPLETED, ACTIVE_NOT_RECRUITING, etc. |
| filter.phase | string | No | EARLY_PHASE1, PHASE1, PHASE2, PHASE3, PHASE4, NA |
| filter.geo | string | No | Geographic filter (distance(lat,lng,dist)) |
| fields | string | No | Comma-separated fields for sparse response |
| sort | string | No | Sort field and direction (e.g., LastUpdatePostDate:desc) |
| pageSize | int | No | Results per page (default 10, max 1000) |
| pageToken | string | No | Cursor token for next page |
| format | string | No | json (default) or csv |
- Example:
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.
- 6d ago First seen · 217 lines · 20 tokens per session scan A ecf030dad486
clinicaltrials-api-v2 is a skill published in the GitHub repository wentorai/research-plugins (291 stars, last pushed 2mo ago), licensed MIT. It adds 20 tokens to every session and 2,174 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 2026-09-03.
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