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Research & Data · Developer Tools
Ols MCP Server
seandavi/ols-mcp-server
This repository contains a Model Context Protocol (MCP) server providing access to the Ontology Lookup Service (OLS) API. This server enables AI assistants to search for and retrieve ontological terms, concepts, and hierarchies from various biological and medical ontologies.
Install
Client configuration
{
"mcpServers": {
"ols-mcp-server": {
"command": "uv",
"args": [
"tool",
"run",
"ols-mcp-server"
]
}
}
}- Author
- @seandavi
- Category
- Research & Data, Developer Tools
- Updated
- Oct 6, 2026
About Ols MCP Server
Large Language Models are notoriously bad at working with ontologies, often hallucinating terms or their identifiers. This server provides a reliable way to access and query ontologies, ensuring accurate and up-to-date information.
Features
Search Terms: Search for terms across ontologies with flexible filtering
Search Ontologies: Discover available ontologies and their metadata
ℹ Get Ontology Information: Retrieve detailed information about specific ontologies
Get Term Information: Get comprehensive details about specific terms
Get Term Children: Find direct child terms in ontological hierarchies
Get Term Ancestors: Retrieve parent terms and ancestors
Find Similar Terms: Discover semantically similar terms using LLM embeddings
Details on this page are taken from the project's README. Open README
Supported clients
Clients mentioned in this server's README:
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