Crawling This Site
Note: This page is primarily intended for computer programs designed to visit every study available in ClinicalTrials.gov (i.e., web crawlers.) Human users should see the Find Studies section for help with basic and advanced searches for clinical studies.
ClinicalTrials.gov makes it easy for Web crawlers to find all the studies included on the site. Each time a study collection is updated, pages of links to all studies are generated. In addition, ClinicalTrials.gov assigns to each study a unique number, called the ClinicalTrials.gov Identifier (NCT Number), in the format NCTxxxxxxxx, where each "x" is a number.
Pages of links to all studies, organized by NCT identifier
This page is primarily intended for use by crawlers. A more friendly approach can be found here.