ClinicalTrials.gov Search - Clinical Trial Data & Drug Studies

Search 576,000+ clinical trials registered on ClinicalTrials.gov. Find trials by condition or disease, drug or intervention, sponsor, or keyword. Filter by status (recruiting, completed, terminated), phase (1–4), and study type. Get enrollment counts, eligibility criteria, intervention details, sponsor names, trial locations, start and completion dates, and direct links to each study.

Data is sourced from the official ClinicalTrials.gov v2 API. No API key required.

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Output Fields

Field	Type	Description
nctId	string	NCT identifier (e.g. NCT04368728)
briefTitle	string	Trial title
status	string	Overall status (RECRUITING, COMPLETED, TERMINATED, etc.)
phase	string	Trial phase (PHASE1, PHASE2, PHASE3, PHASE4)
sponsor	string	Lead sponsor name
conditions	array	Conditions and diseases being studied
interventions	array	Drugs, devices, or procedures being tested
enrollmentCount	integer	Target or actual enrollment count
startDate	string	Trial start date
completionDate	string	Estimated or actual completion date
url	string	Direct link to the trial on ClinicalTrials.gov

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Use Cases

• Pharmaceutical competitive intelligence — Track which sponsors are running Phase 3 trials for a given condition, what drugs are in their pipeline, and when trials are expected to complete.
• Drug development timelines — Monitor the progression of a specific drug or compound across phases and sponsors.
• Patient recruitment platforms — Find actively recruiting trials for a condition, then surface them to patients or advocacy groups.
• Healthcare market research — Identify high-activity therapeutic areas and unmet needs based on trial volume and enrollment size.
• Investment and biotech due diligence — Audit a sponsor's clinical pipeline: active trials, historical completion rates, and phase distribution.
• Academic and regulatory research — Aggregate trial data for systematic reviews or policy analysis.

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How to Use

Choose a search type, enter a query, and optionally filter by status, phase, and study type.

Example input — recruiting breast cancer trials, Phase 3:

{
  "searchType": "condition",
  "query": "breast cancer",
  "status": "RECRUITING",
  "phase": "PHASE3",
  "studyType": "INTERVENTIONAL",
  "maxResults": 50
}

Example input — all Pfizer trials:

{
  "searchType": "sponsor",
  "query": "Pfizer",
  "status": "",
  "phase": "",
  "maxResults": 100
}

Example input — trials for a specific drug (Ozempic):

{
  "searchType": "intervention",
  "query": "Ozempic",
  "status": "",
  "phase": "",
  "maxResults": 50
}

Example input — look up a trial by NCT ID:

{
  "searchType": "nctId",
  "query": "NCT04368728",
  "maxResults": 1
}

Search Types

Value	Description
keyword	Full-text search across all trial fields
condition	Search by condition or disease name
intervention	Search by drug, device, or procedure name
sponsor	Search by lead sponsor or funder
nctId	Direct lookup by NCT identifier

Status Filter Options

RECRUITING, ACTIVE_NOT_RECRUITING, COMPLETED, ENROLLING_BY_INVITATION, NOT_YET_RECRUITING, SUSPENDED, TERMINATED, WITHDRAWN — or leave empty for all.

Phase Filter Options

EARLY_PHASE1, PHASE1, PHASE2, PHASE3, PHASE4 — or leave empty for all.

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Cost

Approximately $0.10 per run (platform start fee) plus minimal compute. A typical run returning 50 trials completes in under 20 seconds.

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Output Formats

Results are available as JSON, CSV, and Excel from the Apify dataset interface.

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FAQ

Does this require an API key? No. ClinicalTrials.gov provides a free public API that requires no authentication.

How current is the data? ClinicalTrials.gov is updated daily. Data returned by this actor reflects the current state of the registry.

How many trials are in the database? Over 576,000 studies across all conditions, phases, sponsors, and countries.

Can I get full trial text or eligibility criteria? The actor returns the structured fields available in the ClinicalTrials.gov API summary response, including a brief summary, conditions, and interventions. For full protocol text, use the url field to access the trial page directly.

What is an NCT ID? The unique identifier assigned to every registered trial (e.g. NCT04368728). It appears in published papers and on the ClinicalTrials.gov website.