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ols4
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ols4

Active·★ 106·Apache-2.0·Updated 2026-10-20

OLS4 is the Ontology Lookup Service, a repository for biomedical ontologies providing a single point of access to up-to-date ontology versions via a website, REST API, and MCP server. It leverages Docker for deployment, with backend components built on Spring Boot, a React frontend, and specialized databases like Solr and Neo4j for search and graph queries.

#Ontology Management#Bioinformatics#REST API#Knowledge Graph#Docker#Kubernetes#Solr
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#Neo4j
$ Install
$ OLS4_CONFIG=./dataload/configs/efo.json ./dataload.sh && HOST_UID=$(id -u) HOST_GID=$(id -g) docker compose up
↗ Visit site★ GitHub
01

Features

01Integrated repository for biomedical ontologies
02Multiple access points: website, REST API, and MCP server
03Advanced search and graph querying via Solr and Neo4j
04Containerized deployment with Docker and Kubernetes support
05Modular architecture with separate dataloader, backend API, and frontend
02

Compatibility

Docker
Runtime
Verified via docs
Kubernetes
Orchestration
Verified via docs
Helm
Package Manager
Verified via docs
Java
Backend Language
Verified via docs
React
Frontend Framework
Verified via docs
Solr
Database
Verified via docs
03

Quick start

1
$ OLS4_CONFIG=./dataload/configs/efo.json ./dataload.sh
2
$ HOST_UID=$(id -u) HOST_GID=$(id -g) docker compose up
04

Use cases

↳Obtaining the latest versions of biomedical ontologies
↳Integrating biomedical ontologies into research and applications
↳Deploying a custom ontology lookup service for specific ontologies
05

Alternatives

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EBISPOT /
ols4
↗

The EMBL-EBI Ontology Lookup Service (OLS)

106Apache-2.0
Last commit3d ago
StatusActive
CategoryRAG / Knowledge Base
Links
Documentation↗Discussion↗Issues↗Releases↗
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