ZBS Index What actually exists in applied AI, with the source next to it

mcp server

openworkdays

Zero-signup business-day date-math API: add days, count days between dates, is-business-day.

Description as published by the maintainer. Source

  • version 0.1.0
  • active

active — Registry entry last updated 2026-05-17.

What this server can do

1 function, named and described by the server itself. Parameter names are shown because they say more about what a function does than its name usually does.

businessdays(end, date, days, start, weekend, holidays)
Business-day date math. Three modes inferred from params: add (start+days -> the date N business days away, negative days = before), diff (start+end -> count of business days between, inclusive of both endpoints), is (date -> is it a business day). Optional weekend (default sat,sun) and holidays (comma list of YYYY-MM-DD you supply). No signup, no API key. Pure UTC date-only math; no time-of-day/DST/timezone.

Last successful function declaration observed on . Source: https://openworkdays.vercel.app/api/mcp. We list what the server declared; we do not call any of these functions.

Endpoint status observed on . Source: https://openworkdays.vercel.app/api/mcp.

Signals

These are separate measurements of different things. They are deliberately not combined into one score, because a popularity number that mixes website traffic with saves and stars cannot be checked or acted on.

Signal Value What it measures Window Observed Source
Latest published version 0.1.0 Latest version string the maintainer published to the registry. as of fetch Model Context Protocol
Registry record last updated 2026-05-17 When the registry record was last updated by its maintainer. point in time Model Context Protocol
First listed in the MCP Registry 2026-05-17 Date this server was first published to the official MCP Registry. Not a usage or quality measure. point in time Model Context Protocol
mcp tools declared 1 tools Number of functions the server itself declared when asked to list them. This is what the server offers an agent, not a measure of how well any of them work. as of probe openworkdays.vercel.app
mcp endpoint status ok The server listed 1 function when asked. as of probe openworkdays.vercel.app

Where to get it

Also from solvohq

This record as data

Every field on this page, with its source and observation date, is in the catalog JSON. Fetch the whole kind at once instead of parsing this HTML.

GET /api/v1/entries/mcp_server.json

Sources

  1. Tools declared by the MCP server at https://openworkdays.vercel.app/api/mcp — openworkdays.vercel.app, observed , trust tier 1.
  2. Official MCP Registry — Model Context Protocol, observed , trust tier 1.