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mcp/harbor
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Japan Business Day MCP

v1.0.0

io.github.rira365/japan-business-day

Japan business days & holidays (official Cabinet Office data). Free tool + x402 USDC paid tools.

transport:streamable-http tools:5

Target client

run in your project directory 

claude mcp add --transport http japan-business-day https://japan-business-day-api.matchan962.workers.dev/mcp

setup guides: Claude Code Claude Desktop Cursor VS Code Zed Windsurf Cline Gemini CLI Grok ChatGPT Claude.ai LangChain

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs

is_business_day_free

is business day free

is_business_day

is business day

add_business_days Mutating

add business days

list_holidays Read-only

list holidays

payment_due_date

payment due date

All 5 tools, one page each

Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. Check the server's own documentation before granting access.