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ols4

Active·★ 90·Apache-2.0·Updated 2026-05-29
★ Trending★ RAG / Knowledge Base★ Observability

The EMBL-EBI Ontology Lookup Service (OLS)

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#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

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Related searches

ols4 AlternativesBest RAG / Knowledge Base Tools 2026Open Source RAG / Knowledge Baseols4 Tutorialols4 Vs CompetitorsOntology ManagementBioinformaticsREST API

Comments

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  • S
    Sage GarciaMay 18, 2026

    EMBL-EBI ontology lookup via MCP is exactly what bioinformatics pipelines need

  • S
    Sterling ClarkMay 1, 2026

    The EBI infrastructure backing this means uptime is excellent

  • S
    Sutton RiveraApr 30, 2026

    Used this for automated gene ontology annotation workflows, works consistently

  • Sam Rivera
    Sam RiveraApr 28, 2026

    Handles complex ontology hierarchies and cross-references reliably

On this page
01Features02Compatibility03Quick start04Use cases05Alternatives
Stats
GitHub Stars★ 90
Last commit1d ago
StatusActive
LicenseApache-2.0
CategoryRAG / Knowledge Base
Trend (30d)
+3.6↑ 0.7%
Links
Documentation↗Discussion↗Issues↗Releases↗

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