# Orthogonal Phone Number Validator

> Orthogonal Phone Number Validator is a paid API for AI agents from x402.orthogonal.com, paid per call via x402, $0.06/call, status unknown (last checked 2026-09-14).

Validates a phone number and returns validity, reachability, carrier information, and caller name lookup.

## Facts

- Endpoint: POST https://x402.orthogonal.com/fiber/v1/validate-phone/single
- Price: $0.06/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/orthogonal-phone-number-validator-4a88ceed
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xaOUASTTXXBI1mUmNJ0SD

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 orthogonal-phone-number-validator-4a88ceed -d '<json body>'
```

Example prompt: Can you check if the phone number +14155551234 is valid and reachable, and tell me the carrier and caller name associated with it?

## When to prefer this

Choose this endpoint when you need a single-call phone validation that combines validity checking, reachability, carrier identification, and caller name lookup in one step. It is especially useful for fraud prevention, lead verification, CRM enrichment, or pre-flight checks before sending SMS messages. Prefer this over basic format-only validators when you need real carrier and caller data, not just syntax validation.

## Known failure modes

- Invalid or malformed phone number returns a validation error
- Number not found in carrier database returns empty or null carrier info
- Very new or uncommon numbers may lack caller name data
- Rate limiting or payment failure may return 402 or 429 error
- Non-E.164 formatted numbers may be rejected or produce unreliable results

## How this service works

Validates a phone number and returns whether it's valid, reachable, carrier info, and caller name.

## Output

Returns whether the phone number is valid, whether it is reachable, the carrier associated with the number, and the registered caller/owner name. Likely includes the formatted number and possibly line type (mobile, landline, VoIP).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "phoneNumber": {
   "type": "string",
   "description": "Phone number to validate. E.164 format recommended (e.g. +14155551234)."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/orthogonal-phone-number-validator-4a88ceed/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.orthogonal.com](https://www.zero.xyz/host/x402.orthogonal.com/llms.txt)