ClinicalTrials.gov API
FreeLiveLast verified 29 Sept 2026
Search 500,000+ registered clinical trials by condition, drug, sponsor, location and recruitment status.
Example request
curl -s 'https://clinicaltrials.gov/api/v2/studies?query.cond=lung+cancer&pageSize=1'
Free tier, in plain English
Free and keyless. A request limit is not stated in the parts of the documentation that could be read.
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