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402utils Phone Number Validator
x402
402utils Phone Number Validator is a paid API for AI agents from 402utils.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-13).
Validates and normalizes a phone number using Google libphonenumber, returning E.164/international/national formats, country detection, and line type classification
Price / call$0.002
Success—
StatusUnknown
How this service works
Validate and normalize a phone number with full Google libphonenumber metadata: strict validity against each national numbering plan, E.164 / international / national formats, country detection (correct across shared codes like +1 and +44) and line type (mobile, fixed_line, toll_free, voip…) where the plan distinguishes it. Pass ?country=FR to parse national formats. Local. ?attest=1 → Ed25519-signed.
Output
A JSON object with: valid (strict boolean per national numbering plan), possible (looser length-plausibility boolean), e164 (normalized E.164 string), national (national format string), country (ISO alpha-2), and type (mobile, fixed_line, toll_free, voip, etc. where the plan distinguishes). Optionally, an attestation object with an Ed25519 signature over the canonical result for audit trail purposes.
Example use cases
Example prompt
“Can you validate the phone number +33612345678 for me — check if it's a real number, what country it belongs to, and whether it's a mobile or landline?”
Technical details
Endpoint
GEThttps://402utils.com/v1/phone-checkWhen to prefer
Use this endpoint when you need strict national-plan-level phone validation (not just length heuristics), E.164 normalization, country detection across shared codes (+1, +44), or line-type classification. Prefer over regex-based validators when accuracy matters. Use the ?attest=1 option when you need a cryptographically signed audit trail of the validation result.
Side effects
- Phone number is unparseable — returns valid:false with no e164/country fields
- Country code provided doesn't match number format — may return valid:false
- Shared country codes like +1 may return undetermined country when number is ambiguous
- Network or service error returns a non-200 HTTP status
- attest=1 requested but key unavailable — attestation object absent or error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"e164": "+442079460958",
"type": "fixed_line",
"valid": true,
"country": "GB",
"national": "020 7946 0958",
"possible": true,
"international": "+44 20 7946 0958"
}
}Tags
x402
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