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x402 Utils – Phone Number Validation & Formatting
x402
x402 Utils – Phone Number Validation & Formatting is a paid API for AI agents from utils.kagurazaka.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-29).
Validates a phone number, identifies its country and line type, and returns E.164, international, and national formats using libphonenumber metadata.
Price / call$0.001
Success—
StatusUnknown
How this service works
Check whether a phone number is valid and possible, find its country and type (mobile, fixed line, toll free and others), and format it as E.164, international and national (libphonenumber metadata).
Output
A JSON object containing: whether the number is valid (boolean), the E.164 formatted string (e.g. '+16502530000'), the international format (e.g. '+1 650 253 0000'), the national format (e.g. '(650) 253-0000'), the ISO country code (e.g. 'US'), and the line type (e.g. 'FIXED_LINE_OR_MOBILE', 'MOBILE', 'TOLL_FREE').
Example use cases
Validate user-submitted phone number
“A user just signed up with the phone number '06-1234-5678' and said they're from Japan — can you validate it, tell me if it's actually possible, and give me the E.164 version to store in our database?”
Identify phone number type and country
“I have this number +447911123456 — is it a mobile or landline, and which country does it belong to?”
Format number for international dialing
“I need to call someone at '(212) 555-0182' in the US — can you format that as a proper international number and E.164 so I can pass it to our dialer?”
Technical details
Endpoint
GEThttps://utils.kagurazaka.dev/v1/phone?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need authoritative phone number validation and formatting using libphonenumber — the industry-standard library used by Google — especially when you need E.164 normalization for storage, need to determine line type (mobile vs. landline vs. toll-free), or need to identify the country of a number. Prefer over regex-based validation when correctness and type classification matter.
Side effects
- Invalid or unparseable phone number — returns valid: false with no formatted outputs
- Missing required 'number' query parameter — likely 4xx error
- National number provided without ISO country code — may fail or return incorrect results
- Number that is syntactically valid but not assigned — may return valid: false
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"e164": "+16502530000",
"type": "FIXED_LINE_OR_MOBILE",
"valid": true,
"country": "US",
"national": "(650) 253-0000",
"international": "+1 650 253 0000"
}
}Tags
x402
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