PlugRail Japanese Calendar for Claude Code

dev.plugrail/jp-calendar

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

client:Claude Code transport:streamable-http tools:4

Install PlugRail Japanese Calendar in Claude Code

run in your project directory

claude mcp add --transport http jp-calendar https://jp-calendar.plugrail.dev/mcp

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