"Proton Calendar" matching MCP connectors:

PlugRail Japanese CalendarA

dev.plugrail

Japanese holiday and business-day calculations using official Japan Cabinet Office data.

Free keyless dealer gamma, OI change, market calendar, 13F, congress and CFTC data, dated, cited.

SEC filings, insider trades, 13F, IPO calendar, macro & FX MCP tools via x402.

Real public holiday lookup for 206 countries via a rule-based calendar engine. Paid via x402.

Shirabe Japan Data HubA

dev.shirabe

Japan data tools for AI agents: calendar (rokuyo), address, name splitting, corporate number lookup

Federal Reserve communications from federalreserve.gov: the FOMC meeting calendar, each policy…

17+ Japan MCP tools (weather/calendar v2/local-pack/enrich). x402 on Base, wallet-free trial.