WhatsApp Number Check

Contact & Address

Know whether a number is reachable on WhatsApp before you message it.

Check if a mobile number has an active WhatsApp account and whether it is a emver account, so candidate invites, reminders and notifications go through the channel the person actually uses.

Endpoint

POST https://app.emver.io/api/sandbox/v1/whatsapp-number-check

Authorization: Bearer YOUR_API_KEY

Content-Type: application/json

Accept: application/json

Request parameters

Field	Type	Description
`mobile` required	phone	Mobile number

Example request

cURL

curl -X POST https://app.emver.io/api/sandbox/v1/whatsapp-number-check \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Accept: application/json" \
  -d '{
    "mobile": "9999999999"
}'

import requests

response = requests.post(
    "https://app.emver.io/api/sandbox/v1/whatsapp-number-check",
    headers={
        "Authorization": "Bearer YOUR_API_KEY",
        "Accept": "application/json",
    },
    json={
        "mobile": "9999999999"
    },
    timeout=60,
)
response.raise_for_status()
data = response.json()

const response = await fetch("https://app.emver.io/api/sandbox/v1/whatsapp-number-check", {
  method: "POST",
  headers: {
    "Authorization": "Bearer YOUR_API_KEY",
    "Content-Type": "application/json",
    "Accept": "application/json",
  },
  body: JSON.stringify({
      "mobile": "9999999999"
  }),
});

const data = await response.json();

$response = Http::withToken('YOUR_API_KEY')
    ->acceptJson()
    ->post('https://app.emver.io/api/sandbox/v1/whatsapp-number-check', {
        "mobile": "9999999999"
    });

$data = $response->json();

Replace YOUR_API_KEY and the placeholder values. Use the switch above to see production URLs.

Response

Structure · 200

{
  "status": INTEGER,
  "message": STRING,
  "data": {
    "on_whatsapp": BOOLEAN,
    "account_type": STRING,
    "business_name": STRING
  }
}

Example · 200

{
  "status": 200,
  "message": "string",
  "data": {
    "on_whatsapp": true,
    "account_type": "string",
    "business_name": "string"
  }
}

Error · 4xx / 5xx

{
  "status": INTEGER,
  "message": STRING
}

See Errors & status codes for what each status means and which calls are billed.

About this API

Send the number; receive WhatsApp availability, account type and, where available, the emver display name.

Typical uses

Candidate outreach. Choose WhatsApp or SMS for each invite.
Collections and reminders. Reachability before campaigns.

Questions

Does it send a message to the number?: No. It is a silent reachability check.