← Validators
tools by fourzerotwo
UK phone number
Classify a UK number (mobile, landline, freephone, premium…) and format as E.164.
UK phone number Free
Classify a UK number (mobile, landline, freephone, premium…) and format as E.164.
- cost
- Free then $0.0005 / call
- MCP tool
- validators__uk-phone
- method
- GET
Free up to 50 calls a day over MCP (500 with a free key), then $0.0005 per call by card credit or USDC. Free key · Pay by card
GET https://fourzerotwo.si/v1/validators/uk-phone
| Param | Type | Description |
|---|---|---|
| number | string | Phone number |
# free: send a free key from https://fourzerotwo.si/free curl -H "X-API-Key: fzt_…" "https://fourzerotwo.si/v1/validators/uk-phone?number=07700%20900123" # no key: returns 402 with the price, for x402 agents curl -i "https://fourzerotwo.si/v1/validators/uk-phone?number=07700%20900123"
by fourzerotwo
Report this endpoint
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": "validators__uk-phone", "arguments": {"number":"07700 900123"}}
More from Validators
- IMEI check digit — Validate an IMEI (length + Luhn) and split TAC, serial and check digit.
- VIN check — VIN format, check digit, WMI and model-year candidates.
- IBAN check — IBAN mod-97 checksum and country length; UK sort code extracted.
- UK postcode format — Validate and normalise UK postcode format; split outward/inward codes.
- Email check — Email syntax, whether the domain accepts mail, disposable and role-account flags.
Validation by fourzerotwo.