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The clinical trials dataset covers registered trials with their design, status, sponsors, conditions, interventions, eligibility criteria, enrollment, key dates, and reported adverse events. Trials also carry citations and publicationsMetadata, linking them back to the published literature — so you can move from a trial to its results papers and their Smart Citations.
Requires the evidence:clinical-trials:api scope. See the Evidence overview for how scopes work.

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Search trials

Each item in results includes title, briefDescription, description, sponsors, pi, conditions, interventions, trialState (phase and overall status), eligibility, enrollment, dates, registry, hasResults, reportedEvents, citations, publicationsMetadata, and an externalLink to the registry entry.

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Useful filters

Filter by date with range suffixes on dates.startDate, dates.completedDate, or dates.lastUpdatedDate: f=dates.startDategte:"2024-01-01" dates.startDatelt:"2025-01-01".

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Sorting

s accepts _relevance (default), dates.startDate, dates.completedDate, and dates.lastUpdatedDate. Combine with sortDir=asc|desc.

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Single trial

GET /api_partner/evidence/clinical-trials/{trial_id} returns the full record, including detailed reportedEvents (adverse events reported for the trial).

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Common uses

  • Pipeline monitoring: filter a condition or intervention by phase and status, sort by dates.lastUpdatedDate to catch changes.
  • Site and sponsor analysis: facet on sponsors.name via the facets endpoint to see who is active in an indication.
  • Evidence synthesis: use hasResults and the linked publicationsMetadata to connect trials to their published outcomes, then check how those papers are cited with tallies.