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ClinicalTrials.gov Search API
x402
ClinicalTrials.gov Search API is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-29).
Searches ClinicalTrials.gov for clinical trials by disease, drug, or sponsor and returns structured trial metadata including NCT ID, status, phase, conditions, interventions, sponsor, dates, enrollment, and countries.
Price / call$0.003
Success—
StatusUnknown
How this service works
Clinical trials on ClinicalTrials.gov by disease, drug or sponsor: title, NCT id, status, phase, conditions, interventions, sponsor, dates, enrollment and countries; recruiting ones by default.
Output
Returns a JSON object containing the search query, total count, status filter used, data source attribution, and an array of trial objects. Each trial includes: NCT ID, title, status, phases array, conditions array, interventions array, sponsor, start date, estimated end date, enrollment count, countries array, and a direct ClinicalTrials.gov link.
Example use cases
Patient trial eligibility research
“Find me recruiting clinical trials for Type 2 diabetes on ClinicalTrials.gov — I want to see the NCT IDs, phases, conditions, and which countries they're running in, limit to 15 results.”
Competitive pharma intelligence
“Search for all clinical trials sponsored by Pfizer on ClinicalTrials.gov and show me their statuses, phases, and conditions — include all statuses, not just recruiting.”
Drug pipeline research
“Look up clinical trials for the drug semaglutide on ClinicalTrials.gov — I need the trial titles, NCT IDs, phases, enrollment numbers, and estimated end dates for up to 20 trials.”
Technical details
Endpoint
POSThttps://api.vextorium.com/ensayos-clinicos-pago?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need structured, machine-readable clinical trial data from ClinicalTrials.gov without building a direct integration. Ideal for agents that need to surface recruiting trials for patients, perform competitive intelligence on sponsors, or track drug development pipelines. Prefer this over manual ClinicalTrials.gov browsing when you need filterable, structured output with enrollment and geographic data in a single call.
Side effects
- No trials found for the given search term — returns empty array with total of 0
- Invalid status enum value — request rejected with validation error
- ClinicalTrials.gov API unavailability — upstream timeout or error
- Misspelled disease/drug name returns no results or unrelated trials
- Very broad search terms may hit result limits and miss relevant trials
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| buscar | string | |
| estado | string | |
| limite | integer |
Tags
x402
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