What countries and regions does localecheck support?
Version 1 covers the UK and USA. Holiday checks for GB default to England, with subdivisions supported.
@qinisolabs
基本信息
Verified locale data for AI agents: dates, phone numbers, currency formatting, VAT/sales-tax by date, public holidays, and addresses (UK & US). Returns checked answers and flags impossible inputs instead of guessing.
使用下面的配置,将此服务器添加到你的 MCP 客户端。
{
"mcpServers": {
"localecheck": {
"command": "npx",
"args": [
"-y",
"localecheck"
]
}
}
}Convert a human-written date into ISO 8601 (YYYY-MM-DD). USE THIS whenever you need to interpret a date a person typed — especially ambiguous numeric dates like 03/04/2025, which mean different things in the UK (day-first) vs US (month-first) — before storing, scheduling, or acting on it. Pass locale 'en-GB' or 'en-US'. Returns valid:false for impossible dates.
Validate a phone number and normalise it to E.164 (e.g. +442079460958). USE THIS before saving a phone number, dialling, or sending an SMS, instead of trusting raw input. Pass region 'GB' or 'US'. Returns valid:false if the number is not real for that region.
Format a money amount the way a reader in a given locale expects (symbol position, decimal/thousands separators). USE THIS whenever you show a price/total to a user or put one in an email, invoice, or report. e.g. 1234.5 GBP en-GB -> '£1,234.50'.
Look up the correct consumption-tax rate. USE THIS before calculating VAT or sales tax on an invoice or quote — never recall the rate from memory, it is DATE-SENSITIVE. GB returns the UK standard VAT rate that applied on the given date (handles historical/temporary changes). US has no national VAT (returns 0); pass a state code like 'CA' for the state base sales-tax rate. Always pass the invoice date for GB.
Check whether a date (YYYY-MM-DD) is a public/bank holiday. USE THIS when computing business-day deadlines, delivery SLAs, or 'next working day'. GB defaults to England; pass subdiv 'SCT'/'WLS'/'NIR' or a US state code. Country is GB or US.
Find the next public/bank holiday on or after a date (default today). USE THIS to answer 'when is the next holiday' or find the next working day. Country is GB or US; subdiv narrows to a UK nation or US state.
Extract structured {country, postcode, city} from a free-text UK or US address. USE THIS when onboarding a user, running a KYC/fraud check, or storing an address, instead of splitting the string yourself. Returns a confidence flag.
localecheck gives AI agents verified, authoritative answers to international data that LLMs routinely hallucinate, covering UK and USA (v1). It is free and requires no API key.
Add localecheck to your MCP server configuration with command: "npx" and args: ["-y", "localecheck"]. It provides tools such as parse_date, validate_phone, format_currency, tax_rate, is_holiday, next_holiday, and parse_address.
€1,234.50 for German readers)Version 1 covers the UK and USA. Holiday checks for GB default to England, with subdivisions supported.
Yes, localecheck is free and requires no API key.
Install by adding localecheck to your MCP config with `command: "npx"` and `args: ["-y", "localecheck"]`. It is live on npm and listed in the official MCP Registry.
The source is available at `https://github.com/qinisolabs/localecheck`.

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