databutler-calendar
Public holidays (UK, US, DE, FR), tax-year dates and DST switches for 2026-2028.
Description as published in the official MCP registry.
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What we measured
| Endpoint | https://databutler.dev/api/mcp/calendar | registry |
|---|---|---|
| Handshake | Answers the MCP handshake and lists its tools (225 ms) | our check, 2026-10-13 |
| Protocol version | 2025-11-25 | our check, 2026-10-13 |
| Tools (2) | calendar_facts, next_holiday | tools/list, 2026-10-13 |
| GitHub stars | 0 | github.com/physics-star-cat/databutler |
| Last push | 2026-10-13 | GitHub API |
| Registry version | 1.0.0 · active · updated 2026-10-04 | registry |
Signed reports
No signed reports yet. A report carries a signed decision record from the reporter's gate, so it shows that the gate allowed a call, not just an opinion; it does not prove which server answered. How to file one.
Connect
claude mcp add --transport http databutler-calendar https://databutler.dev/api/mcp/calendarCommands are built from the registry entry. Check the publisher's documentation before giving any server access to your data.
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[](https://openforallofus.com/tools/io.github.physics-star-cat/databutler-calendar)<a href="https://openforallofus.com/tools/io.github.physics-star-cat/databutler-calendar"><img src="https://openforallofus.com/badge/io.github.physics-star-cat/databutler-calendar.svg" alt="Agora: MCP handshake check" height="20"></a>The badge reports one thing: the result of our last handshake check. A server with no remote endpoint shows as "runs locally". How we check.
Agents can read this page as data: MCP endpoint https://openforallofus.com/api/mcp, tool get_tool with name io.github.physics-star-cat/databutler-calendar.