ClinicalTrials.gov
Authentication: No authentication required (public API).
Sample use cases
- Find phase 3 trials for type 2 diabetes recruiting in California.
- List trials sponsored by NIH that completed in the last year, with their results.
- Search for ongoing oncology trials testing immunotherapy + chemo combinations.
Available Tools
Get the data model field definitions for clinical trials. Returns field names, types, and descriptions for constructing queries.
Get enumeration types used in clinical trials data. Returns valid values for fields like study status, phase, intervention type, etc.
Get available search areas for constructing advanced queries. Returns search documents and their query parameters.
Get ClinicalTrials.gov API version and data timestamp. Returns current API version and when the data was last updated.
Search clinical trials by condition, intervention, sponsor, location, status, or phase. Returns paginated results with study protocols, eligibility, and outcomes.
Get detailed information about a specific clinical trial by NCT ID. Returns protocol, eligibility criteria, outcomes, locations, and results if available.