OTP and sign-up fraud prevention

curl https://api.mobilevalidate.com/v1/lookup \
  -H "Authorization: Bearer mv_test_publicSandboxn9ZgneuhR1B9CRfKG3fulym" \
  -H "Content-Type: application/json" \
  -d '{"numbers":["+447700900001","+447700900003"],"checks":["carrier","whatsapp"],"wait":5}'

// npm install mobilevalidate · Node.js 20+ · save as check.mjs and run: node check.mjs
import { MobileValidate } from "mobilevalidate";

// Omit apiKey to read MOBILEVALIDATE_API_KEY from the environment.
const mv = new MobileValidate({ apiKey: "mv_test_publicSandboxn9ZgneuhR1B9CRfKG3fulym" });
const { data, error } = await mv.lookup({
  numbers: ["+447700900001", "+447700900003"],
  checks: ["carrier", "whatsapp"],
  wait: 5,
});
if (error) console.error(error.code, error.message);
else console.dir(data.results, { depth: null });

// Node.js 18+, Deno, Bun or the browser console (ES module: save as .mjs or use "type": "module").
const res = await fetch("https://api.mobilevalidate.com/v1/lookup", {
  method: "POST",
  headers: {
    Authorization: "Bearer mv_test_publicSandboxn9ZgneuhR1B9CRfKG3fulym",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    numbers: ["+447700900001", "+447700900003"],
    checks: ["carrier", "whatsapp"],
    wait: 5,
  }),
});
console.log(res.status, res.headers.get("x-request-id"));
console.dir(await res.json(), { depth: null });

# pip install mobilevalidate-sdk
from mobilevalidate import MobileValidate

# Omit api_key to read MOBILEVALIDATE_API_KEY from the environment.
mv = MobileValidate(api_key="mv_test_publicSandboxn9ZgneuhR1B9CRfKG3fulym")
result = mv.lookup(
    numbers=["+447700900001", "+447700900003"],
    checks=["carrier", "whatsapp"],
    wait=5,
)
print(result)

<?php
$ch = curl_init('https://api.mobilevalidate.com/v1/lookup');
curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_HTTPHEADER => [
        'Authorization: Bearer mv_test_publicSandboxn9ZgneuhR1B9CRfKG3fulym',
        'Content-Type: application/json',
    ],
    CURLOPT_POSTFIELDS => json_encode([
        'numbers' => ['+447700900001', '+447700900003'],
        'checks' => ['carrier', 'whatsapp'],
        'wait' => 5,
    ]),
]);
$response = curl_exec($ch);
echo curl_getinfo($ch, CURLINFO_RESPONSE_CODE), PHP_EOL, $response, PHP_EOL;

package main

import (
	"fmt"
	"io"
	"net/http"
	"strings"
)

func main() {
	body := strings.NewReader(`{"numbers":["+447700900001","+447700900003"],"checks":["carrier","whatsapp"],"wait":5}`)
	req, err := http.NewRequest("POST", "https://api.mobilevalidate.com/v1/lookup", body)
	if err != nil {
		panic(err)
	}
	req.Header.Set("Authorization", "Bearer mv_test_publicSandboxn9ZgneuhR1B9CRfKG3fulym")
	req.Header.Set("Content-Type", "application/json")
	res, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer res.Body.Close()
	out, _ := io.ReadAll(res.Body)
	fmt.Println(res.Status, string(out))
}

require "net/http"
require "json"

uri = URI("https://api.mobilevalidate.com/v1/lookup")
req = Net::HTTP::Post.new(uri)
req["Authorization"] = "Bearer mv_test_publicSandboxn9ZgneuhR1B9CRfKG3fulym"
req["Content-Type"] = "application/json"
req.body = JSON.generate({
  "numbers" => ["+447700900001", "+447700900003"],
  "checks" => ["carrier", "whatsapp"],
  "wait" => 5
})

res = Net::HTTP.start(uri.host, uri.port, use_ssl: true) { |http| http.request(req) }
puts res.code, res.body

[
  {
    "network.carrier": {
      "service": "network.carrier", "status": "completed", "registered": true,
      "attributes": {"line_type": "mobile", "carrier": "Test Carrier", "country": "GB"},
      "confidence": "high", "confidence_score": 0.99, "checked_at": "2026-09-25T14:28:22.282Z",
      "cached": false, "age_seconds": 0, "billed": false, "reason": null, "poll_after_ms": null
    },
    "whatsapp.registered": {
      "service": "whatsapp.registered", "status": "completed", "registered": true, "attributes": null,
      "confidence": "high", "confidence_score": 0.99, "checked_at": "2026-09-25T14:28:22.282Z",
      "cached": false, "age_seconds": 0, "billed": false, "reason": null, "poll_after_ms": null
    }
  },
  {
    "network.carrier": {
      "service": "network.carrier", "status": "unknown", "registered": null, "attributes": null,
      "confidence": null, "confidence_score": null, "checked_at": null,
      "cached": false, "age_seconds": null, "billed": false, "reason": "UPSTREAM_TIMEOUT", "poll_after_ms": null
    },
    "whatsapp.registered": {
      "service": "whatsapp.registered", "status": "unknown", "registered": null, "attributes": null,
      "confidence": null, "confidence_score": null, "checked_at": null,
      "cached": false, "age_seconds": null, "billed": false, "reason": "UPSTREAM_TIMEOUT", "poll_after_ms": null
    }
  }
]