Ontology Lookup Service

This MCP server provides AI assistants with access to the Ontology Lookup Service (OLS) API, enabling comprehensive search and retrieval of biomedical ontology data including terms, ontologies, and their relationships. Built by Sean Davis using Python with fastmcp, it offers tools for searching terms across ontologies, retrieving detailed ontology information, finding term hierarchies (ancestors/children), and discovering similar terms using LLM embeddings. The implementation serves researchers and developers working with biomedical data who need programmatic access to standardized ontologies like Gene Ontology, Human Phenotype Ontology, and MONDO through conversational AI interfaces, with features like exact matching, obsolete term filtering, and semantic similarity search.