# KiteEndpoints.ai - WhatsApp Phone Number Validator

> KiteEndpoints.ai - WhatsApp Phone Number Validator is a paid API for AI agents from kite-hub-v2.vercel.app, paid per call via x402, $0.12/call, status unknown (last checked 2026-09-14).

Validates whether a phone number has an active WhatsApp account

## Facts

- Endpoint: POST https://kite-hub-v2.vercel.app/api/whatsapp-validator
- Price: $0.12/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/kiteendpoints-ai-whatsapp-phone-number-validator-2091d656
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BZ7D5Li8Tn1ktIE1Kht7g

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 kiteendpoints-ai-whatsapp-phone-number-validator-2091d656 -d '<json body>'
```

Example prompt: Can you check if the phone number +14155552671 is registered and active on WhatsApp before I send them a message?

## When to prefer this

Use this endpoint when you need to verify whether a phone number is reachable via WhatsApp before initiating messaging campaigns, customer outreach, or adding contacts to a WhatsApp-based communication flow. Useful for pre-validating contact lists to reduce failed message delivery rates.

## Known failure modes

- Invalid phone number format returns error
- Number not found on WhatsApp returns negative validation
- Payment failure (insufficient USDC) blocks the request
- Malformed request body returns 400-level error
- External WhatsApp API downtime may cause timeout or 503

## 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 given phone number has an active WhatsApp account, along with associated validation data about the number's 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/kiteendpoints-ai-whatsapp-phone-number-validator-2091d656/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)