01Astronomically precise Japanese calendar data (rokuyo, rekichu, kanshi, 24 solar terms, lunar/Japanese eras)
02Purpose-specific auspicious day judgments with 1-10 scores across 8 categories
03AI-native design supporting OpenAPI 3.1, GPTs Actions, Claude Tool Use, and Gemini Function Calling
04Model Context Protocol (MCP) server support for direct AI agent integration
05Highly scalable and distributed on Cloudflare Workers with automated Stripe billing
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