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si.fourzerotwo/tools · v1.0.1

Time zones and world business days, VAT rates and maths, currency conversion, UK business days…

Connect Remote server

Terminal
claude mcp add --transport http tools https://fourzerotwo.si/mcp/v/tools --header "X-API-Key: <X_API_KEY>"
~/.cursor/mcp.json
{
  "mcpServers": {
    "tools": {
      "url": "https://fourzerotwo.si/mcp/v/tools",
      "headers": {
        "X-API-Key": "<X_API_KEY>"
      }
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "tools": {
      "type": "http",
      "url": "https://fourzerotwo.si/mcp/v/tools",
      "headers": {
        "X-API-Key": "<X_API_KEY>"
      }
    }
  }
}
Claude Desktop
Settings > Connectors > Add custom connector
URL: https://fourzerotwo.si/mcp/v/tools

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools 18 found in our last check

  • calculators__uk-business-days

    Is a date a UK business day; add or subtract N business days; count business days between dates. Uses official bank holidays per nation. Free within the daily allowance, then $0.001 USDC per call via x402.

  • calculators__postcode-distance

    Straight-line distance (km and miles) and compass bearing between two UK postcodes. Free within the daily allowance, then $0.002 USDC per call via x402.

  • calculators__currency-convert

    Convert between ~30 currencies at the ECB reference rate for today or any date in the last 90 days. Free within the daily allowance, then $0.001 USDC per call via x402.

  • time__convert

    Convert a wall-clock time from one IANA zone to another; says when it is ambiguous (clocks go back) or never happens (clocks go forward). Free within the daily allowance, then $0.001 USDC per call via x402.

  • time__now

    Local time, UTC, offset, abbreviation, DST flag, weekday and ISO week for a zone. Free within the daily allowance, then $0.001 USDC per call via x402.

  • time__zone-info

    Offset, abbreviation and DST at a moment, plus the next clock change, for an IANA zone. Free within the daily allowance, then $0.001 USDC per call via x402.

  • time__business-days

    Count business days between two dates, or add business days to a date, skipping weekends and the country's public holidays. Free within the daily allowance, then $0.001 USDC per call via x402.

  • time__signed

    Server UTC time and a request id. The cheapest paid endpoint: use it to test an x402 payment end to end. Costs $0.001 USDC per call via x402.

  • uk-bank-holidays__all

    Every published UK bank holiday by division. Free within the daily allowance, then $0.001 USDC per call via x402.

  • uk-bank-holidays__england-and-wales

    Bank holidays in England and Wales. Free within the daily allowance, then $0.001 USDC per call via x402.

  • uk-bank-holidays__scotland

    Bank holidays in Scotland. Free within the daily allowance, then $0.001 USDC per call via x402.

  • uk-bank-holidays__northern-ireland

    Bank holidays in Northern Ireland. Free within the daily allowance, then $0.001 USDC per call via x402.

  • vat__rates

    Standard, reduced and super-reduced VAT rates for one country or all of EU27 + UK, with the date they were checked. Free within the daily allowance, then $0.001 USDC per call via x402.

  • vat__calculate

    Net to gross or gross to net at a given rate, or at a country's standard rate. Free within the daily allowance, then $0.001 USDC per call via x402.

  • vat__validate-format

    Country format and check digit for UK (GB/XI) and EU VAT numbers. Does not confirm registration. Free within the daily allowance, then $0.001 USDC per call via x402.

  • holidays__year

    Official public holidays for a country (or region provider, e.g. Germany/Bavaria) in a year. Free within the daily allowance, then $0.001 USDC per call via x402.

  • holidays__check

    Is a date a public holiday or business day in a country; add N business days; next business day. Free within the daily allowance, then $0.001 USDC per call via x402.

  • holidays__countries

    Every country and regional provider supported. Free within the daily allowance, then $0.0005 USDC per call via x402.

Headers

NameDescription
X-API-Key
Optional, secret
Optional free key from https://fourzerotwo.si/free (raises the free allowance from 100 to 500 calls/day)

Details

Endpointhttps://fourzerotwo.si/mcp/v/tools (Streamable HTTP)
First published11 Oct 2026
Last updated11 Oct 2026
Registry namesi.fourzerotwo/tools

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Listing data from the official MCP registry. Status and tools from NestDaddy's daily check. Browse all MCP servers.