# NCBI E-utilities Fetch API

**Canonical:** https://apis.io/apis/ncbi/ncbi-e-utilities-fetch-api/  
**Provider:** National Center for Biotechnology Information (NCBI) — https://apis.io/providers/ncbi/  
**Base URL:** https://eutils.ncbi.nlm.nih.gov/entrez/eutils  
**Documentation:** https://www.ncbi.nlm.nih.gov/books/NBK25497/

NCBI E-utilities Fetch API is one of 18 APIs that [National Center for Biotechnology Information (NCBI)](https://apis.io/providers/ncbi/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Fetch. The published artifact set on APIs.io includes an OpenAPI specification and API documentation.

Retrieve records from Entrez databases

## Operations (2)

| Method | Path | Summary |
|---|---|---|
| GET | `/efetch.fcgi` | Fetch Records |
| GET | `/esummary.fcgi` | Get Document Summaries |

## Machine-readable artifacts (10)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/ncbi/refs/heads/main/openapi/ncbi-e-utilities-fetch-api-openapi.yml
- **Documentation** — https://www.ncbi.nlm.nih.gov/books/NBK25497/
- **Portal** — https://www.ncbi.nlm.nih.gov/home/develop/api/
- **SpectralRules** — https://raw.githubusercontent.com/api-evangelist/united-states-national-library-of-medicine/refs/heads/main/rules/ncbi-e-utilities-rules.yml
- **Documentation** — https://www.ncbi.nlm.nih.gov/datasets/docs/v2/api/
- **SwaggerUI** — https://www.ncbi.nlm.nih.gov/datasets/docs/v2/api/rest-api/
- **Repository** — https://github.com/ncbi/datasets
- **Documentation** — https://blast.ncbi.nlm.nih.gov/doc/blast-help/developerinfo.html
- **Documentation** — https://clinicaltrials.gov/data-api/api
- **Portal** — https://clinicaltrials.gov/data-api/api#introduction

## Other National Center for Biotechnology Information (NCBI) APIs (12)

- [NCBI Entrez E-utilities API](https://apis.io/apis/ncbi/ncbi-entrez-e-utilities-api/)
- [NCBI BLAST URL API](https://apis.io/apis/ncbi/ncbi-blast-url-api/)
- [PubChem PUG REST API](https://apis.io/apis/ncbi/pubchem-pug-rest-api/)
- [PMC Open Access API (OA Service)](https://apis.io/apis/ncbi/pmc-open-access-api-oa-service/)
- [PMC ID Converter API](https://apis.io/apis/ncbi/pmc-id-converter-api/)
- [PMC OAI-PMH Service](https://apis.io/apis/ncbi/pmc-oai-pmh-service/)
- [National Center for Biotechnology Information (NCBI) BioSample API](https://apis.io/apis/ncbi/ncbi-biosample-api/)
- [National Center for Biotechnology Information (NCBI) Gene API](https://apis.io/apis/ncbi/ncbi-gene-api/)
- [National Center for Biotechnology Information (NCBI) Genome API](https://apis.io/apis/ncbi/ncbi-genome-api/)
- [National Center for Biotechnology Information (NCBI) Organelle API](https://apis.io/apis/ncbi/ncbi-organelle-api/)
- [National Center for Biotechnology Information (NCBI) Prokaryote API](https://apis.io/apis/ncbi/ncbi-prokaryote-api/)
- [National Center for Biotechnology Information (NCBI) Taxonomy API](https://apis.io/apis/ncbi/ncbi-taxonomy-api/)

## Tags

Fetch

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