GET /esearch.fcgi

Web environment string returned from a previous ESearch, EPost or ELink call

NCBI API key for higher rate limits

Database to search

Constraints: {'enum': ['pubmed', 'protein', 'nuccore', 'ipg', 'nucleotide', 'structure', 'genome', 'annotinfo', 'assembly', 'bioproject', 'biosample', 'blastdbinfo', 'books', 'cdd', 'clinvar', 'gap', 'gapplus', 'grasp', 'dbvar', 'gene', 'gds', 'geoprofiles', 'medgen', 'mesh', 'nlmcatalog', 'omim', 'orgtrack', 'pmc', 'proteinclusters', 'pcassay', 'protfam', 'pccompound', 'pcsubstance', 'seqannot', 'snp', 'sra', 'taxonomy', 'biocollections', 'gtr']}

Query key returned from a previous ESearch, EPost or ELink call

Total number of UIDs from the retrieved set to display (default: 20)

Constraints: {'maximum': 100000}

Return mode. Use 'json' for JSON output, 'xml' for XML output.

Constraints: {'enum': ['xml', 'json']}

Sequential number of the first UID in the retrieved set to display (default: 0)

Method for sorting results (varies by database)

Entrez text query

When 'y', store results on the history server

Constraints: {'enum': ['y', 'n']}