Clinical Trial Site Contact Finder

Find clinical trial sites and their published contacts on ClinicalTrials.gov. Study contacts, per-site coordinators, investigators, locations and eligibility, returned as clean JSON. No API key, no login.

What it does

This actor queries the official ClinicalTrials.gov API v2 and returns structured trial records with the contact details each study publishes — the central study contact, the coordinator at each participating site, and the overall officials (principal investigators).

Contact details come directly from the trial record as the sponsor filed it. Nothing is guessed, inferred, or assembled from elsewhere on the web.

Contact coverage

Measured on 20 recruiting non-small-cell-lung-cancer trials, September 2026:

	trials with the field
At least one contact email	20 / 20
Central study contact email	19 / 20
Site coordinator email	13 / 20
Named principal investigator	9 / 20

Those 20 trials yielded 53 distinct email addresses. Coverage varies by therapeutic area and status — recruiting trials publish contacts far more consistently than completed ones, since the contact exists so patients can enrol.

Output

Every record carries the contacts at the top level, so you don't have to walk the locations array to find a usable address. Field names below are exactly as returned; the values are illustrative rather than a real investigator's details:

{
  "nct_id": "NCT00000000",
  "brief_title": "A Phase 2 Study of Example Drug in Advanced NSCLC",
  "overall_status": "RECRUITING",
  "phase": ["PHASE2"],
  "lead_sponsor_name": "Example Cancer Center and Research Institute",

  "central_contact_name": "Study Coordinator",
  "central_contact_email": "trials@example-center.org",
  "central_contact_phone": "555-0100",

  "site_contact_name": "Site Research Coordinator",
  "site_contact_email": "site.coordinator@example-center.org",
  "site_contact_phone": "555-0142",
  "site_contact_facility": "Example Cancer Center",

  "contact_emails": ["trials@example-center.org", "site.coordinator@example-center.org"],
  "has_contact_email": true,

  "primary_investigator": "A. Investigator, MD",
  "primary_institution": "Example Cancer Center",
  "contact_city": "Tampa",
  "contact_country": "United States"
}

site_contact_* is taken from the first location that actually publishes an email, not simply the first location listed — a trial's first site is often contactless while a later one is not.

Each record also includes the full locations array (facility, city, state, country, coordinates, primary and backup contacts), overall_officials, conditions, interventions, primary outcomes, sponsor, enrollment, eligibility criteria and dates. Filter on has_contact_email to keep only rows you can act on.

Search modes

Mode	Use it for
search_by_condition	Trials for a disease — "non-small cell lung cancer"
search_by_intervention	Trials of a drug or treatment
search_by_sponsor	Everything a given company is running
search_trials	Free-text across all trial data
get_trial_by_nct	One specific trial by NCT ID

Filter any of them by overallStatus, phase, country and maxResults.

Examples

Recruiting diabetes trials in the US

{
  "mode": "search_by_condition",
  "condition": "diabetes",
  "overallStatus": ["RECRUITING", "NOT_YET_RECRUITING"],
  "country": ["United States"],
  "maxResults": 100
}

A competitor's oncology pipeline

{
  "mode": "search_by_sponsor",
  "sponsor": "Pfizer",
  "condition": "cancer",
  "phase": ["PHASE2", "PHASE3"],
  "maxResults": 500
}

One trial in full

{
  "mode": "get_trial_by_nct",
  "nctId": "NCT05681780"
}

Who uses this

• Pharma and CRO site selection — find investigators and sites already running trials in your indication, with a coordinator address to open the conversation.
• Competitive intelligence — track which sponsors are running what, in which phase, where.
• Patient recruitment and referral — locate recruiting trials by condition and geography, with the contact patients are meant to reach.
• Research and systematic review — a normalized trial inventory with consistent field names across thousands of studies.

Pricing

$0.70 per 1,000 results. No subscription, no minimum, no API key to obtain.

Data source and compliance

• Source: the official ClinicalTrials.gov API v2, maintained by the U.S. National Library of Medicine.
• All contact details are published by the trial sponsor for the purpose of being contacted about the study, and are public record.
• No private or confidential data is accessed, and no login or scraping of third-party sites is involved.

Contacts are only as current as the sponsor's last update to the registry. Verify before any high-volume outreach, and respect the purpose for which each contact was published.

Support

Questions and bug reports via the Apify Console or the issue tracker on the repository.