# NCBI Entrez E-utilities

**Canonical:** https://apis.io/apis/life-sciences/ncbi-entrez-e-utilities/  
**Provider:** Life Sciences — https://apis.io/providers/life-sciences/  
**Base URL:** https://eutils.ncbi.nlm.nih.gov/entrez/eutils/  
**Documentation:** https://www.ncbi.nlm.nih.gov/books/NBK25500/

NCBI Entrez E-utilities is one of 22 APIs that [Life Sciences](https://apis.io/providers/life-sciences/) publishes on the [APIs.io](https://apis.io/) network. This API exposes 1 JSON Schema definition. Tagged areas include Genomics, Bioinformatics, NCBI, PubMed, and Reference Data. The published artifact set on APIs.io includes API documentation and 1 JSON Schema.

The set of nine programmatic interfaces (ESearch, EPost, ESummary, EFetch, ELink, EInfo, EGQuery, ESpell, ECitMatch) that provide unified access to all NCBI databases including PubMed, Gene, Genome, Nucleotide, Protein, ClinVar, dbSNP, dbGaP, BioProject, BioSample, GEO, and Taxonomy.

## Machine-readable artifacts (3)

- **Documentation** — https://www.ncbi.nlm.nih.gov/books/NBK25500/
- **Documentation** — https://www.ncbi.nlm.nih.gov/books/NBK25501/
- **JSONSchema** — https://raw.githubusercontent.com/api-evangelist/life-sciences/refs/heads/main/json-schema/gene-schema.json

## Other Life Sciences APIs (12)

- [EU Clinical Trials Register / CTIS](https://apis.io/apis/life-sciences/eu-clinical-trials-register-ctis/)
- [openFDA](https://apis.io/apis/life-sciences/openfda/)
- [DailyMed](https://apis.io/apis/life-sciences/dailymed/)
- [RxNorm API](https://apis.io/apis/life-sciences/rxnorm-api/)
- [DrugBank API](https://apis.io/apis/life-sciences/drugbank-api/)
- [Ensembl REST API](https://apis.io/apis/life-sciences/ensembl-rest-api/)
- [UCSC Genome Browser REST API](https://apis.io/apis/life-sciences/ucsc-genome-browser-rest-api/)
- [ClinVar (via E-utilities)](https://apis.io/apis/life-sciences/clinvar-via-e-utilities/)
- [dbSNP (via E-utilities)](https://apis.io/apis/life-sciences/dbsnp-via-e-utilities/)
- [HL7 FHIR](https://apis.io/apis/life-sciences/hl7-fhir/)
- [SMART on FHIR](https://apis.io/apis/life-sciences/smart-on-fhir/)
- [Benchling Developer Platform](https://apis.io/apis/life-sciences/benchling-developer-platform/)

## Tags

Genomics, Bioinformatics, NCBI, PubMed, Reference Data

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