How to Build a Clinical Trial Search App in 5 Minutes - Clinical Trials API Tutorial

What We're Building

In the next 5 minutes, you'll build a simple web app that lets users search for clinical trials by condition and phase, display results in cards, and paginate through results. Clinical Trials API is a REST API that wraps ClinicalTrials.gov into a developer-friendly interface. It gives you structured eligibility criteria (parsed into categories like Age, Gender, Condition, Lab Values -- no regex needed), geographic radius search by lat/lon, HTTP webhook alerts for new trials, cursor-based pagination, and aggregate statistics. Free tier available with no credit card. 480,000+ trials across 220+ countries, updated daily from the FDA. All powered by one API. You'll need basic HTML/JavaScript knowledge and a free RapidAPI account.

Step 1: Get Your API Key (30 Seconds)

Go to https://rapidapi.com/capifactory-capifactory-default/api/clinical-trials-api

Click "Subscribe" on the Free plan (no credit card required)