Summary
Connects Claude to holiday data through the OpenHolidays API via the Pipeworx gateway. The source doesn't list specific tools, but given the name, you'd expect operations for querying public holidays by country, region, or date range. Useful when you need to factor holidays into scheduling, calculate business days, or understand regional observances without hardcoding calendar data. Part of Pipeworx's larger gateway that bundles 851+ data sources, so you can add just this endpoint or connect to the full suite. Includes an ask_pipeworx natural language interface that routes questions to the right tools automatically instead of calling them directly.
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mcp-openholidays
OpenHolidays MCP.
Part of Pipeworx — an MCP gateway connecting AI agents to 1476+ live data sources.
Tools
| Tool | Description |
|---|---|
public_holidays | Public (statutory) holidays for a European country in a date range, with regional subdivisions. EUROPE-focused (~30 countries: DE, FR, NL, CH, IT, AT, BE, ES, PL, etc.). Returns each holiday with its localized name, dates, whether it is nationwide, and which subdivisions observe it. Keyless. For school terms/breaks use school_holidays instead. |
school_holidays | School holidays (term breaks: Christmas, Easter, summer, etc.) for a European country in a date range, optionally scoped to one subdivision. This is the unique value-add over worldwide public-holiday sources — school calendars vary by region. EUROPE-focused (~30 countries). Returns each break with its localized name, dates, and observing subdivisions. Keyless. |
list_countries | List the ~30 European countries OpenHolidays covers, with their ISO codes and official languages. EUROPE-focused. Keyless. |
list_subdivisions | List the regional subdivisions (federal states, regions, cantons, etc.) of a European country, with their codes and category. Use the returned codes to scope school_holidays. EUROPE-focused. Keyless. |
Quick Start
Add to your MCP client (Claude Desktop, Cursor, Windsurf, etc.):
{
"mcpServers": {
"openholidays": {
"url": "https://gateway.pipeworx.io/openholidays/mcp"
}
}
}
What this endpoint actually serves
tools/list at https://gateway.pipeworx.io/openholidays/mcp returns the tools in the table
above plus the shared Pipeworx meta-tools — ask_pipeworx,
discover_tools, search_within, remember/recall and the rest of the
gateway-wide set. So the tool count you see is larger than this table: a
single-pack endpoint currently lists roughly 30 shared tools alongside the
pack's own. The connection's initialize response states its exact scope, and
is the authoritative answer for a given day.
This is deliberate, not multiplexing by accident. The meta-tools are what let a
scoped connection answer a question this pack does not cover — via
ask_pipeworx, which routes across the whole catalog — without you adding a
second MCP server. There is currently no way to mount a pack endpoint without
them; if the extra schemas cost you more context than the routing is worth,
connect to the full gateway once rather than to several pack endpoints.
Or connect to the full Pipeworx gateway to get every pack's tools listed directly, instead of just this one's:
{
"mcpServers": {
"pipeworx": {
"url": "https://gateway.pipeworx.io/mcp"
}
}
}
Both URLs reach the same gateway and the same 1476+ data sources. The
only difference is which pack's tools are listed directly; ask_pipeworx
reaches all of them from either one.
Using with ask_pipeworx
Instead of calling tools directly, you can ask questions in plain English — this works on the pack endpoint above as well as on the full gateway:
ask_pipeworx({ question: "your question about Openholidays data" })
The gateway picks the right tool and fills the arguments automatically.
More
License
MIT
No MCP client? Call it over HTTP
curl -X POST https://gateway.pipeworx.io/v1/tools/public_holidays \
-H 'Content-Type: application/json' \
-d '{"country":"DE","valid_from":"2024-01-01","valid_to":"2024-12-31"}'
No account needed for the first calls. Inspect any tool: GET https://gateway.pipeworx.io/v1/tools/public_holidays. Find one: POST https://gateway.pipeworx.io/v1/tools/search_packs with {"query":"..."}.
Featured
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Download Free life-time →Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →Connect your Claude agent to live crypto prices and trading routes via 1inch
Get the MCP →