Entrez Programming Utilities

The Entrez Programming Utilities (E-utilities) are a set of eight server-side programs that provide a stable interface into the Entrez query and database system at the National Center for Biotechnology Information (NCBI). The E-utilities use a fixed URL syntax that translates a standard set of input parameters into the values necessary for various NCBI software components to search for and retrieve the requested data. The E-utilities are therefore the structured interface to the Entrez system, which currently includes 38 databases covering a variety of biomedical data, including nucleotide and protein sequences, gene records, three-dimensional molecular structures, and the biomedical literature. Technical Documentation at http://www.ncbi.nlm.nih.gov/books/NBK25501/

Data and Resources

Field Value
accessLevel public
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catalog_@id https://healthdata.gov/data.json
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
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identifier https://datadiscovery.nlm.nih.gov/api/views/ia8w-5q76
issued 2012-08-22
landingPage https://www.ncbi.nlm.nih.gov/books/NBK25501/
license http://opendefinition.org/licenses/odc-odbl/
modified 2022-05-25
programCode {009:041}
publisher National Library of Medicine
resource-type Dataset
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Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • amerigeo
  • amerigeoss
  • api
  • biomedicine
  • ckan
  • computational-biology
  • geo
  • geoss
  • national
  • north-america
  • tools-utilities
  • united-states
isopen False
license_id other-license-specified
license_title other-license-specified
maintainer National Library of Medicine
maintainer_email custserv@nlm.nih.gov
metadata_created 2025-11-22T18:37:27.611656
metadata_modified 2025-11-22T18:37:27.611661
notes The Entrez Programming Utilities (E-utilities) are a set of eight server-side programs that provide a stable interface into the Entrez query and database system at the National Center for Biotechnology Information (NCBI). The E-utilities use a fixed URL syntax that translates a standard set of input parameters into the values necessary for various NCBI software components to search for and retrieve the requested data. The E-utilities are therefore the structured interface to the Entrez system, which currently includes 38 databases covering a variety of biomedical data, including nucleotide and protein sequences, gene records, three-dimensional molecular structures, and the biomedical literature. Technical Documentation at http://www.ncbi.nlm.nih.gov/books/NBK25501/
num_resources 2
num_tags 12
title Entrez Programming Utilities