"knowledge" matching MCP connectors:

Open Targets MCP — disease/target/drug knowledge graph.

Monarch biomedical knowledge graph — diseases, phenotypes, genes, variants

MCP server for querying BrainKB, a knowledge base for neuroscience knowledge graphs.

Disease Twin — Brazil's rare-disease knowledge graph (10,468) over MCP. Source-grounded, PT-BR.

Medical RAG: semantic search for clinical guidelines, drug interactions, diagnoses & EHR data.