ClinicalTrials.gov API v2

The U.S. National Library of Medicine's modernized REST/JSON API for the ClinicalTrials.gov registry. Provides programmatic access to records of privately and publicly funded clinical studies conducted around the world, replacing the legacy AACT/full-study download path with a JSON-first interface and OpenAPI specification.

ClinicalTrials.gov API v2 is one of 20 APIs that Life Sciences publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

This API exposes 1 JSON Schema definition.

Tagged areas include Clinical Trials, Registry, NIH, NLM, and Public Data. The published artifact set on APIs.io includes API documentation, an OpenAPI specification, sample payloads, and 1 JSON Schema.

OpenAPI Specification

swagger.yaml Raw ↑