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jp-calendar

https://jp-calendar.plugrail.dev/mcp

answers a handshake

Registry name: dev.plugrail/jp-calendar
Reports itself as: jp-calendar 0.2.0
Protocol version: 2025-06-18
Transport: streamable-http
HTTP status: 200
Latency: 673 ms
Tools: 4
Checked: 2026-09-06T02:58:02Z

Tools it reports

is_holiday
list_holidays
add_business_days
business_days_between

Check it yourself

curl -s -X POST https://jp-calendar.plugrail.dev/mcp \
  -H 'Content-Type: application/json' \
  -H 'Accept: application/json, text/event-stream' \
  -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2025-06-18","capabilities":{},"clientInfo":{"name":"you","version":"0"}}}'