Checks up to 100 phone numbers from any country
Checks up to 100 phone numbers from any country: valid or not, the number in international E.164 format (+441174960012) and national format, country, and line type (mobile, landline, toll free, VoIP) from Google's libphonenumber data. Set defaultRegion (GB, US...) for numbers written without a country code. Does not call the number. $0.002 per number, $0.002 minimum. Same engine as nerolabs/phone-number-validator.
Answeringour last check, 2026-10-21
1 of 1checks answered this week
30 msmedian answer time
$0.006listed price per call
$0.006price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://x402-agent-tools.nerolabs.workers.dev/phone-check
| Category | Code and developer |
|---|---|
| Provider host | x402-agent-tools.nerolabs.workers.dev |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 0 from 0 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-21 | valid payment request | 402 | $0.006 | 30 ms |
Example input (from the provider)
{
"body": {
"defaultRegion": "GB",
"phones": [
"0117 496 0012",
"+1 (415) 555-0132",
"12345"
]
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"defaultRegion": {
"description": "Two-letter ISO country code assumed for numbers written without a country code, for example GB, US, AU, DE. Numbers starting with + are unaffected.",
"type": "string"
},
"flagNonPersonal": {
"description": "Default true: toll free, shared cost, UAN, pager and voicemail numbers come back risky.",
"type": "boolean"
},
"flagPremiumRate": {
"description": "Default true: premium-rate numbers come back risky rather than valid.",
"type": "boolean"
},
"flagVoip": {
"description": "Default true: VoIP numbers come back risky.",
"type": "boolean"
},
"keep": {
"description": "Which rows to return. all (default), valid, valid_and_risky, problems, or mobile (confirmed mobiles only, for SMS). The summary still counts every number.",
"enum": [
"all",
"valid",
"valid_and_risky",
"problems",
"mobile"
],
"type": "string"
},
"markDuplicates": {
"description": "Default true: later repeats of the same E.164 number in this call come back duplicate.",
"type": "boolean"
},
"phoneField": {
"description": "Rows only. The field holding the number, for example \"phone\" or \"contact_number\". Leave out to detect it automatically.",
"type": "string"
},
"phones": {
"description": "A plain list of phone numbers in any format, for example [\"+44 20 7946 0123\", \"07825 123456\", \"(212) 555-0123\"]. Bare numbers such as 2079460123 are also accepted. Use this OR rows.",
"items": {
"type": "string"
},
"type": "array"
},
"rows": {
"description": "JSON objects that each hold a phone number in one field. Every original field comes back untouched with the verdict fields added. Use this OR phones.",
"items": {
"type": "object"
},
"type": "array"
}
},
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}