NCBI E-utilities

The E-utilities are a suite 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.

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Base URL: https://eutils.ncbi.nlm.nih.gov/entrez/eutils/
Auth: none
Endpoints: 9
Reachable: yes
CORS: unknown
Last checked: 2026-03-14 16:08:12.977177

Links

Homepage: https://www.ncbi.nlm.nih.gov/
API Base: https://eutils.ncbi.nlm.nih.gov/entrez/eutils/
Documentation:
SDKs:

100.0%

Uptime (7d)

1348ms

Avg latency (7d)

23

Probes (7d)

Latency (7d)

Success Rate (7d)

Topics

GENOMICS, GOVERNMENT, SCIENCE

Endpoints

Method Path Summary Auth Last Status Latency
GET /ecitmatch.fcgi Match citations to PubMed IDs — 200 1147ms
GET /efetch.fcgi Retrieve full records in specified format — 200 382ms
GET /egquery.fcgi Search all Entrez databases with a single query — — —
GET /einfo.fcgi Retrieve database statistics and information — 200 351ms
GET /elink.fcgi Retrieve related or linked records — 200 6764ms
GET /epost.fcgi Upload UID list to Entrez History server — 200 353ms
GET /esearch.fcgi Search and retrieve primary IDs matching a query — 200 598ms
GET /espell.fcgi Check spelling and suggest corrections — 500 355ms
GET /esummary.fcgi Retrieve document summaries for a list of IDs — 200 370ms