← Calculators
tools by fourzerotwo
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.
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.
- price
- $0.001 / call
- free tier
- free allowance
- MCP tool
- calculators__uk-business-days
- method
- GET
GET https://fourzerotwo.si/v1/calculators/uk-business-days
| Param | Type | Description |
|---|---|---|
| date | string | YYYY-MM-DD |
| add? | integer | Business days to add (negative to subtract) |
| until? | string | Count business days until YYYY-MM-DD |
| nation? | string | england-and-wales, scotland, northern-ireland |
# unpaid: returns 402 with the price curl -i "https://fourzerotwo.si/v1/calculators/uk-business-days?date=2026-12-23" # free tier: send a free key from https://fourzerotwo.si/free curl -H "X-API-Key: fzt_…" "https://fourzerotwo.si/v1/calculators/uk-business-days?date=2026-12-23"
Use it from an AI agent (MCP)
Add the server once, then ask for this data in plain English. The agent finds the endpoint with search_apis and runs it with call_api.
{
"mcpServers": {
"fourzerotwo": { "type": "http", "url": "https://fourzerotwo.si/mcp" }
}
}
# the call the agent makes
call_api {"tool": "calculators__uk-business-days", "arguments": {"date":"2026-12-23","add":5,"until":"2027-01-08","nation":"england-and-wales"}}
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ECB reference rates; GOV.UK bank holidays and ONS postcode data under the Open Government Licence v3.0.