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ClinicalTrials.gov Search
x402
ClinicalTrials.gov Search is a paid API for AI agents from agents.crowdspark.me, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-31).
Searches ClinicalTrials.gov for clinical studies by keyword, condition, or intervention, returning structured trial metadata including NCT ID, status, phases, enrollment, sponsors, and site counts.
Price / call$0.005
Success—
StatusUnknown
How this service works
Pay-per-call utilities for AI agents over x402, USDC on Base.
Output
A JSON object with a list of up to 25 matching studies, each containing NCT ID, title, status, phases, study type, enrollment count, conditions, interventions, lead sponsor, start and completion dates, a boolean results flag, site count, and a direct link to the trial on ClinicalTrials.gov. Also includes total match count, number returned, source attribution, and a disclaimer that data is from the public registry and not medical advice.
Example use cases
Patient finding recruiting trials
“Find me any currently recruiting clinical trials for Type 2 diabetes in California — show me up to 10 results with trial names, NCT IDs, phases, and how many sites each one has.”
Researcher scoping drug trial landscape
“Search ClinicalTrials.gov for all Phase 3 trials involving pembrolizumab for lung cancer — I want to see their statuses, enrollment counts, sponsors, and start dates.”
Journalist auditing trial results availability
“Pull up completed clinical trials for Alzheimer's disease that have results posted — up to 25 trials — so I can see which NCT IDs have published outcomes and who sponsored them.”
Technical details
Endpoint
GEThttps://agents.crowdspark.me/v1/gov/clinical-trials?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need structured, queryable data from the official ClinicalTrials.gov registry — especially when you need to filter by recruitment status, phase, condition, intervention, or geography. Prefer this over general web search when you need machine-readable fields like NCT ID, enrollment, sponsor, and completion dates for downstream processing, reporting, or patient-matching workflows.
Side effects
- No trials found for highly specific or obscure query terms — returns empty studies array
- Invalid phase or status enum values may be ignored or return unexpected results
- Location filtering may not match all site countries if location string is ambiguous
- Limit exceeding 25 is clamped or rejected
- Free-text queries with typos or brand names instead of generic drug names may miss results
- Rate limit exceeded if daily free-tier quota exhausted without payment header
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"source": "ClinicalTrials.gov API v2 (US NLM, public)",
"studies": [
{
"url": "https://clinicaltrials.gov/study/NCT06467604",
"title": "CRAVE Study: Comparing Craving Responses and Diet Quality of GLP1 Receptor Agonist Users",
"nct_id": "NCT06467604",
"phases": [
"NA"
],
"status": "ACTIVE_NOT_RECRUITING",
"sponsor": "University of California, Davis",
"conditions": [
"Obesity"
],
"enrollment": 60,
"start_date": "2024-11-01",
"study_type": "OBSERVATIONAL",
"has_results": false,
"interventions": [],
"completion_date": null,
"locations_count": 1
}
],
"returned": 1,
"disclaimer": "Registry data only. Not medical advice.",
"total_matches": 822
}
}Tags
x402
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