# Arch Tools — Phone Validate

> Arch Tools — Phone Validate is a paid API for AI agents from archtools.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Validates a phone number and returns its validity, format, and metadata, optionally scoped to a specific country.

## Facts

- Endpoint: POST https://archtools.dev/v1/tools/phone-validate
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/arch-tools-phone-validate-c188b026
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_R9ggtKdazv6ni6X8mqzxp

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability arch-tools-phone-validate-c188b026 -d '<json body>'
```

Example prompt: Can you validate the phone number +1 (415) 555-0192 for me and check if it's a real US number?

## When to prefer this

Use this endpoint when you need per-number phone validation with country-scoped checking, line-type detection, and normalization in a single call. Prefer it over regex-only checks when you need carrier or line-type metadata, or when you need to confirm a number is actually dialable in a given country.

## Known failure modes

- Invalid or unparseable phone number string returns a validation failure response
- Unsupported country code may yield incomplete or lower-confidence results
- Missing required 'phone' field returns a 400-level error
- Ambiguous number without a country hint may resolve incorrectly
- Payment failure (insufficient USDC balance) blocks the request

## How this service works

E.164 format, type, country code. Pay per call with USDC (x402) or credits - archtools.dev

## Output

A JSON object indicating whether the phone number is valid, its normalized/formatted form, the detected country, line type (mobile, landline, VOIP, etc.), and optionally carrier information.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "phone": {
   "type": "string",
   "description": "Phone number to validate"
  },
  "country": {
   "type": "string",
   "description": "ISO 3166-1 alpha-2 country code (e.g. US, GB)"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/arch-tools-phone-validate-c188b026/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from archtools.dev](https://www.zero.xyz/host/archtools.dev/llms.txt)