Menu

Individual skill

clinicaltrials-api-v2

Search and analyze clinical trials via the ClinicalTrials.gov v2 API

skills/domains/biomedical/clinicaltrials-api-v2/SKILL.md

Read pinned source

Source commit bf44b3cd617fa94c8a1b254c5d1987142ca3d631

What was checked

Matches the observed repository HEAD
Yes
Scanner rules are current
Yes
Repository scan complete
No
Skill scan complete
No
Observed behavior
Network or broad shell
Last checked
Nov 5, 2026

These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.

Install this skill

Choose an agent in your Stack or copy a command below. Commands fetch the pinned commit and copy only this skill directory. Existing destinations are refused. Copying a command does not install anything.

An install command is unavailable: current rules, complete repository and skill scans, an eligible behavior level and a permitted license are required.

Repository context

Repository stars (not skill ratings)
310
Repository last updated
Jun 19, 2026
License
MIT

Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.

Files and excerpt

File metadata and permitted, redacted excerpts come from the recorded scan. Source links are pinned to that commit.

Browse files
Read excerpt

# 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