# NCBI E-utilities (Entrez Programming Utilities)

**Canonical:** https://apis.io/apis/nih/ncbi-e-utilities-entrez-programming-utilities/  
**Provider:** National Institutes of Health (NIH) — https://apis.io/providers/nih/  
**Base URL:** https://eutils.ncbi.nlm.nih.gov/entrez/eutils/  
**Documentation:** https://www.ncbi.nlm.nih.gov/home/develop/api/

NCBI E-utilities (Entrez Programming Utilities) is one of 15 APIs that [National Institutes of Health (NIH)](https://apis.io/providers/nih/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include PubMed, Literature, Genomics, and Entrez. The published artifact set on APIs.io includes API documentation.

The public API to the NCBI Entrez system providing programmatic access to all Entrez databases including PubMed, PMC, Gene, Nuccore, and Protein. Supports searching, fetching, linking, and summarizing records across 38+ databases.

## Machine-readable artifacts (2)

- **Documentation** — https://www.ncbi.nlm.nih.gov/books/NBK25500/
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/nih/refs/heads/main/apis.yml

## Other National Institutes of Health (NIH) APIs (12)

- [PubChem Power User Gateway (PUG REST)](https://apis.io/apis/nih/pubchem-power-user-gateway-pug-rest/)
- [NIH RePORTER API](https://apis.io/apis/nih/nih-reporter-api/)
- [NCBI BLAST URL API](https://apis.io/apis/nih/ncbi-blast-url-api/)
- [PubMed Central (PMC) OA API](https://apis.io/apis/nih/pubmed-central-pmc-oa-api/)
- [National Institutes of Health (NIH) BioSample API](https://apis.io/apis/nih/nih-biosample-api/)
- [National Institutes of Health (NIH) Gene API](https://apis.io/apis/nih/nih-gene-api/)
- [National Institutes of Health (NIH) Genome API](https://apis.io/apis/nih/nih-genome-api/)
- [National Institutes of Health (NIH) Organelle API](https://apis.io/apis/nih/nih-organelle-api/)
- [National Institutes of Health (NIH) Prokaryote API](https://apis.io/apis/nih/nih-prokaryote-api/)
- [National Institutes of Health (NIH) Stats API](https://apis.io/apis/nih/nih-stats-api/)
- [National Institutes of Health (NIH) Studies API](https://apis.io/apis/nih/nih-studies-api/)
- [National Institutes of Health (NIH) Taxonomy API](https://apis.io/apis/nih/nih-taxonomy-api/)

## Tags

PubMed, Literature, Genomics, Entrez

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/nih/ncbi-e-utilities-entrez-programming-utilities/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/nih/.