Skip to main content
The Evidence API searches non-citation research and regulatory records: patents, grants, clinical trials, FDA device/drug records, and adverse-event and safety-alert databases, sourced from Resolute’s evidence datasets. Every dataset follows the same four-endpoint pattern, so once you’ve used one, you’ve used them all.
Evidence isn’t included in a standard self-service Pro key. Each dataset requires its own scope (evidence:patents:api, evidence:grants:api, evidence:clinical-trials:api, and equivalents for the other datasets). Email sales to get a dataset scope added to your account, then generate a new key from the API Console so it picks up the scope.

​
The pattern

For a resource {resource} (e.g. patents): Search takes two parameters, and they work differently than the Search API:
  • q: free-text query. Supports AND, OR, NOT, and phrase matching with double quotes: q=CRISPR, q="gene therapy" AND cancer.
  • f: field filters, space-delimited, in field:"value" format (values must be double-quoted). Call the resource’s schema endpoint to see which fields are filterable.
Date range filters use gte/lt suffixes with no space before the suffix: f=dates.startDategte:"2024-01-01" dates.startDatelt:"2025-01-01". ISO dates, epoch milliseconds, and timezone offsets are all accepted; dates without a timezone are treated as UTC. Sorting uses s (default _relevance; each dataset page lists its sortable fields) and sortDir, not the sort/sort_order names from Search. Pagination uses p (page number), not limit/offset. Every search response has the same envelope: { totalResults, delay, resultsPerPage, from, results }. Only the shape of each item in results differs per dataset.
Some fields in search and detail responses are either a plain string or an object shaped like {"id": "...", "name": "...", "highlighted": "..."}, depending on the query. Handle both, e.g. value.id ?? value.name ?? value.

​
Datasets

Patents

Patent filings with family, citation, assignee, and legal-event data.

Clinical Trials

Registered trials with phase, status, sponsors, interventions, and linked publications.

Grants

Research grant awards from NIH RePORTER, NSF, and other funders.

Drugs

FDA drug labels, Orange Book listings, and Drugs@FDA application records.

Device Clearances

FDA 510(k) clearance decisions and their summary PDFs.

Adverse Events

FDA MAUDE (device) and FAERS (drug) adverse-event reports.

Safety Alerts

UK MHRA safety alerts, including full alert document content.
  • Search guide: the equivalent search over publications, with a different query syntax than Evidence
  • Full parameter reference: see Evidence in the API Reference tab; per-resource filters are best discovered via each resource’s /schema endpoint
  • Errors and rate limits: troubleshoot missing dataset scopes and retryable failures