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ClinicalTrials.gov Study Search
x402
ClinicalTrials.gov Study Search is a paid API for AI agents from api.companyrecords-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-24).
Search ClinicalTrials.gov registry for studies matching a condition, drug, or keyword, returning NCT IDs, titles, statuses, sponsors, and study links.
Price / call$0.002
Success—
StatusUnknown
How this service works
Pay-per-call company registry, government, legal and B2B data tools for AI agents, from official registers and public sources. Payment: x402, USDC on Base, Solana, Arc, Polygon, Arbitrum, Monad, World Chain, Optimism, Avalanche, Celo or Stellar, or RLUSD/XRP on the XRP Ledger. No signup, no API key; a failed call is not charged.
Output
A JSON object containing the search query, source URL, a checkedAt timestamp, a totalCount of matching studies, and an array of up to 10 study records — each with nctId, title, status (e.g. COMPLETED, RECRUITING), startDate (YYYY-MM), conditions array, leadSponsor name, and a direct link to the ClinicalTrials.gov study page.
Example use cases
Researching trials for a rare disease
“Search ClinicalTrials.gov for clinical trials related to amyotrophic lateral sclerosis and give me the NCT IDs, current status, start dates, and who's sponsoring each study — show me up to 8 results.”
Checking drug trial activity
“Are there any registered clinical trials for semaglutide on ClinicalTrials.gov? Give me the titles, statuses, and lead sponsors for the top 5.”
Competitive pharma intelligence
“Look up ClinicalTrials.gov for studies involving CAR-T therapy and tell me which organizations are listed as lead sponsors and whether those trials are active or completed.”
Technical details
Endpoint
GEThttps://api.companyrecords-api.workers.dev/api/gov/clinicaltrials?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need structured registry data from ClinicalTrials.gov — NCT IDs, statuses, sponsors, and conditions — without scraping the site directly. Prefer it over general web search when you need machine-readable study metadata, official NCT identifiers, or sponsor information for a known condition or drug. Not suitable for retrieving full study protocols, results data, or adverse event summaries.
Side effects
- Query string shorter than 2 or longer than 100 characters returns a validation error
- Limit outside 1–10 range is rejected
- Rare or misspelled conditions may return zero results
- ClinicalTrials.gov API upstream outage causes failure
- Results reflect sponsor-registered data and may be outdated or incomplete
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"query": "diabetes",
"source": "https://clinicaltrials.gov/api/v2/studies",
"studies": [
{
"url": "https://clinicaltrials.gov/study/NCT00109746",
"nctId": "NCT00109746",
"title": "Use of a Nutritional Supplement to Treat Diabetic Symptoms in HIV-Infected Adults",
"status": "COMPLETED",
"startDate": "2005-11",
"conditions": [
"Insulin Resistance",
"HIV Infections"
],
"leadSponsor": "National Center for Complementary and Integrative Health (NCCIH)"
},
{
"url": "https://clinicaltrials.gov/study/NCT02077803",
"nctId": "NCT02077803",
"title": "A Bioequivalence Study of the Fixed Dose Combination Tablets of Canagliflozin and Metformin Extended Release (XR) With Respect to the Individual Components in Healthy Fed Participants",
"status": "COMPLETED",
"startDate": "2014-03",
"conditions": [
"Healthy"
],
"leadSponsor": "Janssen Research & Development, LLC"
}
],
"checkedAt": "2026-10-23T09:37:07.569Z",
"totalCount": 35446
}
}Tags
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