VS Code Date Math public_holidays
How to: VS Code Date Math public_holidays
Add Date Math to VS Code
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01
Open .vscode/mcp.json and merge this in. Keep any servers already there.
{
"servers": {
"date-math": {
"type": "http",
"url": "https://date-math.datemath.workers.dev/mcp"
}
}
}-
02
Save the file and restart VS Code.
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03
Ask for something public_holidays does. VS Code lists the server's tools on connect and calls public_holidays itself — you do not invoke it by name.
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04
If nothing happens, check the server is running and that Date Math's identifier in your config matches the one above exactly.
Requires agent mode. MCP: Open User Configuration puts the same block in every workspace. VS Code docs
Set these first
Date Math will not start until these are set, so public_holidays never becomes available.
-
DATE_MATH_PRIVATE_KEY -
DATE_MATH_MAX_PRICE
Same tool, other clients
This list was read from the server itself, by connecting to it and calling tools/list on 14 November 2026. It is what
the server actually exposes, not what its listing claims.
Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. The registry stores tool names only; connect the server for its live schemas.