# WhatsApp Phone Number Validator

> WhatsApp Phone Number Validator is a paid API for AI agents from kite-hub-v2.vercel.app, paid per call via x402, $0.17/call, status unknown (last checked 2026-09-14).

Validates whether a given phone number is registered and active on WhatsApp

## Facts

- Endpoint: POST https://kite-hub-v2.vercel.app/api/whatsapp-validator3
- Price: $0.17/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/whatsapp-phone-number-validator-7a140492
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wJ8_3hcCYpot7JYefcYau

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 whatsapp-phone-number-validator-7a140492 -d '<json body>'
```

Example prompt: Can you check if the phone number +14155552671 is registered on WhatsApp so I know if I can reach them there?

## When to prefer this

Use this endpoint when you need to verify whether a phone number has an active WhatsApp account before initiating outreach, building a contact list, or routing communications. Ideal for pre-validating customer phone numbers for WhatsApp-based marketing or support workflows.

## Known failure modes

- Invalid or malformed phone number format returns an error
- Phone number not found or not registered on WhatsApp
- Network timeout or upstream WhatsApp API unavailability
- Missing required phone number input returns validation error
- Rate limiting if called too frequently

## How this service works

400+ paid API endpoints. Social media, AI, crypto, finance, weather, ecommerce, tools. Pay per request with USDC on Base chain.

## Output

Returns a result object indicating whether the provided phone number is registered and active on WhatsApp, along with associated metadata about the account status.

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "example": {
  "result": {
   "data": "example response"
  }
 },
 "properties": {
  "result": {
   "type": "object",
   "description": "API response data"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/whatsapp-phone-number-validator-7a140492/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from kite-hub-v2.vercel.app](https://www.zero.xyz/host/kite-hub-v2.vercel.app/llms.txt)