"Overview of HTTP (HyperText Transfer Protocol)" matching MCP connectors:

Rhea MCP — expert-curated database of biochemical reactions.

KEGG REST MCP — Kyoto Encyclopedia of Genes and Genomes.

GWAS Catalog (EBI/NHGRI) MCP — curated catalog of genome-wide association studies.

Bioregistry — meta-registry of biomedical identifier prefixes

A unified biomedical graph database that integrates 50+ primary data sources — genes, proteins, compounds, diseases, pathways, and clinical data — into a single queryable graph with billions of cross-reference edges. Its native MCP server gives LLMs direct access to structured, authoritative biomedical data, complementing their reasoning with reliable identifiers and up-to-date database content.