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wtsp.dev Carrier Lookup
x402
wtsp.dev Carrier Lookup is a paid API for AI agents from wtsp.dev, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-11).
Look up carrier, line type, country, and location details for any phone number
Price / call$0.004
Success—
StatusUnknown
How this service works
Look up any phone number on WhatsApp: registration, business profile, profile photo and carrier. AI agents pay per request in USDC on Base with x402. No sign-up, no API key.
Output
A JSON object containing the phone number in E.164 format, carrier name (original carrier for ported numbers), ISO 3166-1 alpha-2 country code, country name, flag emoji, line type (mobile/fixed line/VoIP/toll-free etc.), isMobile boolean, location (town or region if published), timezones array, national format, international format, and country calling code.
Example use cases
Fraud detection pre-screening
“Before processing this new user signup, can you check what carrier and line type the phone number +14155552671 is on? I want to flag if it's a VoIP number.”
Contact data enrichment
“I have a customer phone number +33612345678 — can you tell me the carrier, whether it's mobile or landline, and what country and timezone it's in?”
Messaging route validation
“We're about to send an SMS campaign to +5511987654321 — can you confirm whether that number is a mobile line and which carrier it's on so we can route it correctly?”
Technical details
Endpoint
GEThttps://wtsp.dev/v1/carrier?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need lightweight, no-signup carrier and line-type intelligence for any phone number globally, billed per-request via USDC on Base. Ideal for agents that need to enrich contact data, pre-screen signups for VoIP fraud, or validate SMS routing without committing to a subscription-based telecom API.
Side effects
- Invalid or unrecognizable phone number format returns an error
- Numbers from countries with no carrier data may return null fields
- Ported numbers return original carrier, not current carrier
- Rate limiting or payment failure via x402 protocol returns 402 Payment Required
- Premium or short code numbers may not resolve cleanly
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"flag": "🇬🇧",
"phone": "+447400123456",
"carrier": "Three",
"country": "GB",
"isMobile": true,
"lineType": "mobile",
"location": null,
"national": "07400 123456",
"timezones": [
"Europe/London"
],
"countryName": "United Kingdom",
"international": "+44 7400 123456",
"countryCallingCode": "+44"
}
}Tags
x402
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