ClinicalTrials.gov Search & Monitor

Search the official US National Library of Medicine ClinicalTrials.gov registry by condition, drug, sponsor, location, status, phase, study type and date range, and get clean, flat records ready for spreadsheets, CRMs and BI tools. Turn on monitor mode and a scheduled run returns only trials that are new or have been updated since the last run.

Data source: the free, public ClinicalTrials.gov API v2 operated by the U.S. National Library of Medicine (NLM). No scraping, no proxies, no API key.

Who uses it

• Pharma and biotech BD / competitive intelligence: track competitor pipelines, new Phase 2/3 starts, terminated or withdrawn programs.
• CROs and site networks: find trials by sponsor, country and phase to target proposals.
• Patient-recruitment firms: list recruiting trials by condition and city, with eligibility and published central contacts.
• Investors and analysts: watch catalysts, enrollment and completion dates for a sponsor or drug.
• Journalists and researchers: build datasets of trials by condition, country or time period.

Input

Field	Description
condition	Disease or condition, e.g. breast cancer
intervention	Drug, device or procedure, e.g. semaglutide
sponsor	Lead sponsor or collaborator, e.g. Pfizer
country / state / city	Location filter
query	Free-text search with AND / OR / NOT
statuses	RECRUITING, NOT_YET_RECRUITING, COMPLETED, TERMINATED, ...
phases	EARLY_PHASE1, PHASE1, PHASE2, PHASE3, PHASE4, NA
studyType	INTERVENTIONAL, OBSERVATIONAL, EXPANDED_ACCESS or ANY
startDateFrom / startDateTo	Study start date range (YYYY-MM-DD)
updatedFrom / updatedTo	Last-update date range
maxResults	Default 20
includeEligibilityText, eligibilityMaxChars	Include the full inclusion/exclusion text, optionally truncated
onlyNew	Emit only new or updated trials since the last run

A run with empty input works and returns 20 diabetes trials.

Example: recruiting Phase 3 oncology trials in Germany

{ "condition": "lung cancer", "statuses": ["RECRUITING"], "phases": ["PHASE3"], "country": "Germany", "maxResults": 200 }

Example: everything a sponsor registered or changed lately

{ "sponsor": "Novo Nordisk", "updatedFrom": "2026-09-01", "maxResults": 500 }

Output

One record per trial: nctId, title, officialTitle, status, phase, studyType, conditions, interventions, sponsor, sponsorClass, collaborators, enrollment, startDate, primaryCompletionDate, completionDate, firstPosted, lastUpdate, briefSummary, locationsCount, countries, sites (first 5), eligibility (age range, sex, healthy volunteers, age groups, optional criteria text), primaryOutcomes, contacts (central contacts as published by the registry), officials, url. Export as JSON, CSV, Excel, XML or via API.

Monitoring and scheduling

1. Run once with onlyNew: true to record a baseline (all current matches are emitted).
2. Create an Apify Schedule (daily or weekly) with the same input.
3. Each later run emits only trials that are new or whose last-update date changed. Connect the dataset to Slack, email, Google Sheets or a webhook.

State is kept in a named key-value store (clinical-trials-seen by default), separately for each distinct search, so you can monitor many searches safely. Results are sorted by most recently updated first.

Pricing

Pay per event: one trial-result event per trial returned (suggested about $2 per 1,000 trials). Trials skipped in monitor mode are not charged. You're never charged for failed or empty lookups, and the run's status message tells you why any input came back short. Set a max charge per run to cap spend; the Actor stops cleanly when the limit is reached.

FAQ

Is this the official data? Yes. Records come directly from the public ClinicalTrials.gov API v2 (NLM / NIH). This Actor is not affiliated with or endorsed by NLM.

Are the contact emails personal data? They are the central contact details that sponsors publish in the public registry. Use them in line with applicable law (CAN-SPAM, GDPR) and avoid bulk unsolicited mailing.

How many results can I get? The API pages through the whole registry (over 500,000 studies). Set maxResults as needed.

Why does a sponsor search return other sponsors? The registry matches the term against sponsor and collaborator fields and its synonym index; check the sponsor and collaborators fields.

Dates look partial. The registry publishes some dates as YYYY-MM only; they are returned as published.

Not medical advice. Registry data is provided by sponsors and may be incomplete or outdated. Verify on clinicaltrials.gov before relying on it.

Built by Winters Works.

Is it legal? (public data only)

Yes, in the sense that it only reads public or official data: the public ClinicalTrials.gov API v2. It does not log in, bypass paywalls or access private data. You remain responsible for how you use the results, including privacy, copyright and marketing laws. Not affiliated with or endorsed by the data sources.

Quick start and cost

Run it with the prefilled input to see sample output in seconds; the default run costs only a few cents at most. Then adjust the input and schedule it.

Use from code and AI agents

Call it from any language with the Apify API, or let an AI agent find and run it through the Apify MCP server.

from apify_client import ApifyClient
run = ApifyClient("<YOUR_APIFY_TOKEN>").actor("wintersworks/clinical-trials-search-monitor").call(run_input={"condition": "diabetes", "maxResults": 20})
items = ApifyClient("<YOUR_APIFY_TOKEN>").dataset(run["defaultDatasetId"]).list_items().items

Results land in the run's dataset (JSON, CSV, Excel). Set a maximum charge per run in the run options to cap spend.

About

Built and maintained by Winters Works. Questions or feature requests: open an issue on the Actor page or email wintersworks.shop@gmail.com.

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