# Phone Number Batch Validation API

> Phone Number Batch Validation API is a paid API for AI agents from phone-validation.api.klymax402.com, paid per call via x402, $0.035/call, status unknown (last checked 2026-09-15).

Validates up to 50 phone numbers in a single batch request, checking their format, reachability, and validity

## Facts

- Endpoint: GET https://phone-validation.api.klymax402.com/api/validate/batch
- Price: $0.035/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/phone-number-batch-validation-api-8f64208b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_t6NuZSV0DYhDONuPeb8UA

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 phone-number-batch-validation-api-8f64208b
```

Example prompt: Can you validate these phone numbers for me and tell me which ones are real: +14155552671, +442071838750, +61291234567, +33123456789? I need to know which are valid before importing them into our CRM.

## When to prefer this

Choose this endpoint when you need to validate multiple phone numbers at once (up to 50) in a single API call, making it cost-effective and efficient compared to single-number validation loops. Ideal for CRM data cleansing, pre-SMS campaign validation, user registration pipelines, or any workflow where a batch of contacts needs phone verification before outreach.

## Known failure modes

- Array exceeds 50 phone numbers — request rejected with batch size error
- Malformed phone number strings cause per-item validation errors
- Empty phones array returns error or empty results
- Missing required phones parameter returns 400 Bad Request
- Payment failure via x402 protocol blocks the request
- Rate limiting if too many requests are sent in quick succession

## How this service works

Validate up to 50 phone numbers in a single batch request

## Output

An array of validation results for each submitted phone number, indicating whether each number is valid, its format status, and potentially line type or carrier information. Invalid or malformed numbers are flagged accordingly.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "phones": {
   "type": "array",
   "items": {
    "type": "string"
   },
   "description": "Array of phone numbers to validate (max 50)"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/phone-number-batch-validation-api-8f64208b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from phone-validation.api.klymax402.com](https://www.zero.xyz/host/phone-validation.api.klymax402.com/llms.txt)