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Find NCI-Supported Clinical Trials

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NCI-supported clinical trials are those sponsored or otherwise financially supported by NCI. See our guide, Steps to Find a Clinical Trial, to learn about options for finding trials not included in NCI's collection.

Search Tip: Skip any items that are unknown or not applicable or try our basic search.

The Clinical Trials API: Use our data to power your own clinical trial search

An application programming interface (API) helps translate large amounts of data in meaningful ways. NCI’s clinical trials search data is now powered by an API, allowing programmers to build applications using this open data.