"Proton Calendar" matching MCP connectors:

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

Anonymous read-only Formula 1 tools, resources, prompts, completion, and interactive dashboard.

Chinese almanac: lunar calendar, BaZi 八字, daily 宜忌, lucky-day picker, public holidays.

Photon MCP — OSM geocoder

Prayer times, Qibla, Hijri calendar, 99 Names, Quran audio, Bangladesh offsets. English + Bengali.

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

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