ClinicalTrials.gov API

Public REST API for accessing clinical trial data from ClinicalTrials.gov, a database of privately and publicly funded clinical studies conducted around the world.

The API provides access to study information including trial details, conditions, interventions, sponsors, locations, outcomes, and eligibility criteria.

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Screenshot:
Screenshot of ClinicalTrials.gov API homepage
Base URL: https://clinicaltrials.gov/api/v2/
Auth: none
Endpoints: 3
Reachable: yes
CORS: unknown
Last checked: 2026-03-14 16:07:55.811653

Links

Homepage: https://clinicaltrials.gov/data-api/about
API Base: https://clinicaltrials.gov/api/v2/
Documentation:
SDKs:

100.0%

Uptime (7d)

183ms

Avg latency (7d)

14

Probes (7d)

Latency (7d)

Success Rate (7d)

Topics

HEALTH

Endpoints

Method Path Summary Auth Last Status Latency
GET /studies Search and retrieve clinical studies none 400 173ms
GET /studies/{nctId} Get a specific clinical study none 200 179ms
GET /version Get API version none 200 217ms