NIH Clinical Trials API

Name: NIH Clinical Trials API
Availability: InStock

Clinical trial data worldwide

🔑 Auth: None 🔒 HTTPS: Yes 🌐 CORS: Enabled View Documentation

Live Technical Metrics

Pre-calculated · updated every 20 min

Server-measured technical metrics for the NIH Clinical Trials API
Uptime Status	⬜ Unknown — not yet probed
Server Latency	N/A
Hosting Server	Not disclosed
Content-Type	Not disclosed
Cache-Control	Not set
CORS Support	✅ Enabled — safe for browser fetch()
Authentication	✅ None required — call the API directly without a key
Category	Health

Endpoint:: https://clinicaltrials.gov/api/gui

Quick Integration Code

✅ No API key needed

fetch("https://clinicaltrials.gov/api/gui")
  .then(response => {
    if (!response.ok) throw new Error(`HTTP ${response.status}`);
    return response.json();
  })
  .then(data => console.log(data))
  .catch(error => console.error("Request failed:", error));

import requests

url = "https://clinicaltrials.gov/api/gui"
headers = {
    "Accept": "application/json",
    # "Authorization": "Bearer YOUR_TOKEN_HERE",
}

response = requests.get(url, headers=headers, timeout=10)
response.raise_for_status()
data = response.json()
print(data)

curl -X GET "https://clinicaltrials.gov/api/gui" \
  -H "Accept: application/json" \
  -H "User-Agent: MyApp/1.0" \
  --max-time 10 \
  --silent | python3 -m json.tool

Sample JSON Response — Health

Health

{
  "result": [
    {
      "term": "hypertension",
      "definition": "A condition in which the force of the blood against the artery walls is too high.",
      "also_known_as": [
        "high blood pressure"
      ],
      "icd_10_code": "I10",
      "body_system": "Cardiovascular",
      "severity": "chronic"
    }
  ]
}