MCP server

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si.fourzerotwo/tools

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

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

Working at last checkVerified publisher: fourzerotwo.siAbout 1,947 tokens per request once connected18 tools

Website

https://fourzerotwo.si/mcp/v/tools

At a glance

Type: MCP server
Publisher: fourzerotwo.si (verified by the MCP Registry)
Status: Working at last check
Tools: 18
Token cost: About 1,947 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to Cursor Add to VS Code VS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http tools https://fourzerotwo.si/mcp/v/tools

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.tools]
url = "https://fourzerotwo.si/mcp/v/tools"

Gemini CLI

{"mcpServers":{"tools":{"httpUrl":"https://fourzerotwo.si/mcp/v/tools"}}}

Cursor

{"mcpServers":{"tools":{"url":"https://fourzerotwo.si/mcp/v/tools"}}}

VS Code

{"servers":{"tools":{"type":"http","url":"https://fourzerotwo.si/mcp/v/tools"}}}

Antigravity

agy mcp add tools https://fourzerotwo.si/mcp/v/tools

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"tools","server_url":"https://fourzerotwo.si/mcp/v/tools","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"tools","server_url":"https://fourzerotwo.si/mcp/v/tools"}

Tools

calculators__currency-convert ~153 tokens
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.
calculators__postcode-distance ~109 tokens
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__uk-business-days ~182 tokens
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.
holidays__check ~130 tokens
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 ~61 tokens
Every country and regional provider supported. Free within the daily allowance, then $0.0005 USDC per call via x402.
holidays__year ~123 tokens
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.
time__business-days ~174 tokens
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__convert ~154 tokens
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 ~86 tokens
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__signed ~66 tokens
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.
time__zone-info ~113 tokens
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.
uk-bank-holidays__all ~61 tokens
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 ~62 tokens
Bank holidays in England and Wales. Free within the daily allowance, then $0.001 USDC per call via x402.
uk-bank-holidays__northern-ireland ~62 tokens
Bank holidays in Northern Ireland. Free within the daily allowance, then $0.001 USDC per call via x402.
uk-bank-holidays__scotland ~57 tokens
Bank holidays in Scotland. Free within the daily allowance, then $0.001 USDC per call via x402.
vat__calculate ~152 tokens
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__rates ~97 tokens
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__validate-format ~105 tokens
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.

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