# klymax402 Phone Validation API

> klymax402 Phone Validation API is a paid API for AI agents from klymax402.com, paid per call via x402, $0.008/call, status unknown (last checked 2026-09-13).

Validates a phone number and returns its E.164 format, country info, number type, and SMS capability

## Facts

- Endpoint: GET https://klymax402.com/api/phone-validation/api/validate
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/klymax402-phone-validation-api-8bf0e4f7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_IbQT7NT5bIToMEo6Q_7s1

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 klymax402-phone-validation-api-8bf0e4f7
```

Example prompt: Can you check if +14155552671 is a valid phone number and tell me whether it can receive SMS messages?

## When to prefer this

Use this endpoint when you need a quick, pay-per-call phone validation with no API key setup, especially within an agent workflow that already uses the klymax402 multi-API MCP platform. Ideal for one-off checks or low-volume validation where signing up for a dedicated phone validation service is overkill.

## Known failure modes

- Missing or malformed phone parameter returns an error
- Unrecognized or completely invalid phone string may return valid:false with limited detail
- Payment failure (402) if USDC balance is insufficient
- Rate limiting or network timeout from the aggregator platform

## How this service works

One MCP endpoint gives your AI agent access to 100 APIs -- crypto, DeFi, web, AI, finance and utilities. No API keys, USDC on Base from $0.003/call.

## Output

Returns a JSON object with: whether the phone number is valid (boolean), the E.164-formatted number, the national number, country details, the number type (mobile/landline/etc.), and whether the number is SMS-capable.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "phone"
     ],
     "properties": {
      "phone": {
       "type": "string",
       "description": "Phone number to validate (e.g. +33612345678, +14155552671, 0033612345678)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "e164": "example",
  "phone": "example",
  "valid": true,
  "country": {},
  "numberType": "example",
  "smsCapable": true,
  "nationalNumber": "example"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/klymax402-phone-validation-api-8bf0e4f7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from klymax402.com](https://www.zero.xyz/host/klymax402.com/llms.txt)