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Toolrail Phone Number Validator
x402
Toolrail Phone Number Validator is a paid API for AI agents from toolrail.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-20).
Validates and formats a phone number for ~240 regions using Google libphonenumber, returning validity, region, line type, and E.164/international/national formats
Price / call$0.002
Success—
StatusUnknown
How this service works
Validate and format phone numbers for ~240 regions (Google libphonenumber): validity, region, line type, E.164 / international / national formats. Use when normalizing or checking phone numbers before saving a contact or sending SMS or WhatsApp.
Output
Returns a JSON object with: a boolean validity flag, the parsed phone number string, the region/country code (e.g. 'US', 'BR'), the line type (e.g. 'mobile', 'fixed_line'), the E.164 format (e.g. '+14155550132'), the international format (e.g. '+1 415-555-0132'), and the national format (e.g. '(415) 555-0132').
Example use cases
Pre-send SMS validation
“I'm about to blast an SMS campaign — can you validate the number +44 7911 123456 for me, confirm it's a mobile line, and give me the properly formatted E.164 version so I don't waste credits on bad numbers?”
CRM contact normalization
“A new lead just signed up with the phone number '0033 6 12 34 56 78' — can you validate it, figure out what country it's from, and normalize it to international format before I save it to the CRM?”
WhatsApp reachability check
“Before I send a WhatsApp message, can you check if +55 11 91234-5678 is a valid number, what region it's in, and whether it looks like a mobile line that WhatsApp would support?”
Technical details
Endpoint
POSThttps://toolrail.dev/validate/phone?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need authoritative phone number validation powered by Google libphonenumber across ~240 regions, especially when you need multiple output formats (E.164, international, national) and line-type classification in a single call. Prefer it over regex-based validation for production contact pipelines, SMS pre-send checks, or WhatsApp eligibility screening where accuracy matters.
Side effects
- Invalid or unparseable phone number returns valid=false with no formatted outputs
- Missing 'phone' field in request body causes validation error
- Ambiguous number without country code hint may parse to wrong region
- Extremely malformed strings may return an error response rather than valid=false
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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