36-system open taxonomy knowledge graph: NAICS, ISIC, HS, SOC, ISCO, ESCO, CPC, UNSPSC, Patent CPC, GDPR, and more - all connected by crosswalk edges. REST API + MCP server.
taxonomy mcp open-data knowledge-graph classification crosswalk naics isic product-classification fastapi occupational-classification open-taxonomy
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Updated
Apr 14, 2026 - Python