ClinicalTrials.gov Search - Clinical Studies, Sponsors, Sites & Status

Search 500,000+ clinical studies on ClinicalTrials.gov (U.S. National Library of Medicine) through the official API v2. Filter by condition, drug/intervention, sponsor, location, phase, recruitment status and last-update date, and get one clean JSON row per study: NCT ID, titles, status, phases, conditions, interventions, lead sponsor and collaborators, enrollment, key dates, number of sites, countries, site list and the official study contacts. No API key, no scraping - 50 studies in under a second.

Who uses it

• Pharma & biotech business development / competitive intelligence: track every competitor trial for a drug class or indication; spot new phase 3 starts.
• CROs, site networks & recruitment vendors: find recruiting and not-yet-recruiting studies in your countries and reach the official study contacts.
• Investors & analysts: monitor pipelines of listed biotechs (sponsor filter) and status changes (terminated, completed, results posted).
• Medical writers, consultants & researchers: build landscape tables in minutes instead of days.
• AI / automation: daily "updated within 1 day" monitor into Slack, Sheets, a CRM or an LLM via the Apify API.

Input

Field	Description
conditions	Diseases, e.g. obesity, NSCLC. One search per condition.
interventions	Drugs/devices, e.g. semaglutide. Combined with each condition.
searchTerms	Free text across all fields.
sponsor, location	Sponsor/collaborator name; country/state/city/facility.
statuses	Recruiting, not yet recruiting, completed... (ANY for all).
phases, studyType	Phase 1-4, interventional / observational.
updatedWithinDays	Only studies updated in the last N days.
maxItemsPerQuery	Max studies per search (default 100).
includeLocations, includeContacts, includeDescription	Optional detail blocks.

{ "conditions": ["lung cancer"], "interventions": ["pembrolizumab"], "phases": ["PHASE3"], "statuses": ["ANY"], "location": "Germany", "maxItemsPerQuery": 200 }

Output (one row per study)

{
  "nctId": "NCT03036488", "briefTitle": "Study of Pembrolizumab (MK-3475) Plus Chemotherapy vs Placebo ... (KEYNOTE-522)",
  "overallStatus": "COMPLETED", "studyType": "INTERVENTIONAL", "phases": ["PHASE3"],
  "conditions": ["Triple Negative Breast Neoplasms"], "interventions": ["Biological: Pembrolizumab", "Drug: Carboplatin", "..."],
  "leadSponsor": "Merck Sharp & Dohme LLC", "leadSponsorClass": "INDUSTRY", "enrollment": 1174, "enrollmentType": "ACTUAL",
  "startDate": "2017-03-07", "primaryCompletionDate": "2025-10-14", "lastUpdatePosted": "2026-10-22", "hasResults": true,
  "locationCount": 193, "countries": ["Australia", "Brazil", "Canada", "..."],
  "locations": [{ "facility": "...", "city": "Scottsdale", "state": "Arizona", "country": "United States", "status": null }],
  "centralContacts": [], "overallOfficials": [{ "name": "Medical Director", "affiliation": "Merck Sharp & Dohme LLC", "role": "STUDY_DIRECTOR" }],
  "studyUrl": "https://clinicaltrials.gov/study/NCT03036488"
}

Pricing (pay per event)

• $0.002 per study saved (trial) - 500 studies = $1.
• Tiny start fee per run (apify-actor-start). Failed searches are not charged. Set "Maximum cost per run" to cap spend.

Notes

• Source: ClinicalTrials.gov public API (U.S. NLM / NIH). Data is as registered by sponsors - check the study page before relying on it. Not affiliated with NIH/NLM. Not medical advice.
• Contacts are the official study contacts published on ClinicalTrials.gov; use them only for study-related communication and respect applicable privacy and anti-spam laws.