Need help with your APIs? I offer API discovery, governance & evangelism services. Explore services →
API Evangelist API Evangelist
Discovery
Learnings
Guidance
Toolbox
Alignment
API Evangelist LLC

National Library of Medicine Search API

Search Entrez databases for matching records.

National Library of Medicine Search API is one of 4 APIs that National Library of Medicine publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Search. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, a getting-started guide, and an API reference.

This API exposes 2 operations across 2 paths. It is described by OpenAPI 3.0.3, at version 1.0.

Requests are made against a single base URL, https://eutils.ncbi.nlm.nih.gov/entrez/eutils.

2 operations 2 paths 0 schemas 2 GET

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.0.3
API Version
1.0
Base URL
https://eutils.ncbi.nlm.nih.gov/entrez/eutils
Resource Areas
1

Paths & Operations 2

Across 2 paths, the API surfaces 2 operations — 2 GET. Each is listed below with its method, path, parameters, and response codes.

Search 2

Search Entrez databases for matching records.

GET
/esearch.fcgi
Search a database
eSearch 7 params → 200
GET
/egquery.fcgi
Global cross-database query
eGQuery 1 param → 200

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

national-library-of-medicine-search-api-openapi.yml Raw ↑

Other APIs National Library of Medicine publishes across the network.

National Library of Medicine Discovery API
National Library of Medicine History API
National Library of Medicine Retrieve API