"Arm" matching MCP connectors:

Argentina 'Series de Tiempo' MCP — national time-series API (apis.datos.gob.ar).

Harvard Art Museums MCP.

Polish company registry: 4.4M firms, KRS/REGON data, VAT white list checks, financial statements

Art MCP — Metropolitan Museum of Art Collection API (free, no auth)

Japan, Korea and UK official data for AI agents: filings, FX, weather, travel, patents, AI tools.

UK farm subsidy schemes — SFI, Countryside Stewardship, payment rates, eligibility