# ClinicalTrials.gov

Source: https://nuclide.cc/collections/clinicaltrials-gov/  
Nuclide record `clinicaltrials-gov` (Collection). Data CC BY-NC 4.0, attribute "Data from Nuclide (nuclide.cc)"; commercial use needs a licence.

## TL;DR

ClinicalTrials.gov is the master list of clinical trials. Every trial on this site links to its record.

## Summary

ClinicalTrials.gov is the registry and results database of more than 500,000 clinical studies worldwide, run by the NIH National Library of Medicine and released as public domain US Government work. Registration is mandatory for US trials, and API v2 gives structured access to eligibility criteria, arms, outcome measures and posted results, which makes it the backbone of any trial-matching tool. Every trial on Nuclide links to its ClinicalTrials.gov record, and the collection is tied to the technology AI trial matching and clinical decision support. It is also cited by bottleneck records including Trials enrol too few, too slowly, Failures are hidden, Data silos and Weak real-world evidence and registries, and by ideas such as One standing umbrella trial for all rare cancers in a country.

## Fields

- Kind: Collection
- Last checked: 2026-09-04
- URL: https://clinicaltrials.gov
- Holds: Registry and results database of >500,000 clinical studies worldwide.
- Licence: Public domain (US Government)

## Sources

- ClinicalTrials.gov: https://clinicaltrials.gov

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JSON: https://nuclide.cc/api/v1/entities/clinicaltrials-gov.json