Exclude papers before this year.

Exclude papers after this year.

Exclude papers before this month within year_min. Requires year_min.

Exclude papers after this month within year_max. Requires year_max.

Only include human studies.

Only include controlled studies.

Exclude studies with smaller sample sizes.

Exclude journals in better quartiles, where 1 is the best quartile.

Exclude journals in lesser quartiles, where 1 is the best quartile.

Exclude papers with fewer citations.

Minimum study duration (in days).

Maximum study duration (in days).

Exclude preprints, only include peer-reviewed papers.

Only include open-access papers.

Comma-separated publisher display names to filter by.

Comma-separated academic field short codes, not email or web domains, to filter by. Valid values: med, bio, cs, chem, psych, phys, mat, eng, env, bus, econ, math, poli, agri, edu, soc, geol, geog, hist, art, philo, law, ling.

Comma-separated ISO 3166-1 alpha-2 country codes (e.g. us, gb) to filter to those countries of study. Unknown codes are ignored; if none resolve, the filter is not applied.

Preferred journal name (e.g. "Nature"). Results from matching journals are surfaced higher; this does not exclude other journals.

Filter to papers classified as clinical guidelines.

Filter to top medical journals and guidelines, about 8M documents

Return the semantic score for each result when true. The score is only returned for the top 50 results.

Return query-relevant full-text excerpts. Available on paid plans (Pro, Deep, Teams, Enterprise).

Page number of results to return (0-indexed, max 50 pages).

Number of papers to return per page. Defaults to 20. The maximum depends on your plan: Pro and Teams can request up to 300, Deep up to 750, and Enterprise up to 1000. A larger value is capped to your plan's maximum (see the page_size returned in the response).