Check if a phone number exists in WhatsApp

This tutorial demonstrates how to verify whether a given phone number is registered on WhatsApp and capable of sending and receiving messages through the platform.

Phone Number Format Requirements

The phone number must be formatted in E164 standard (e.g., +1234567890).

API Request Details

• One number can be checked per API request
• Multiple numbers require sending multiple HTTPS requests
• The check occurs in real-time, requiring your WhatsApp session to be online and synchronized

Monthly Limits by Plan

Depending on your subscription tier, you can check between 2,000 to 50,000 phone numbers monthly. Consult the pricing comparison table for specific plan details.

Important Limitation

"If the number check is performed in real-time, your WhatsApp number session must be online and synced, otherwise the API will return a 503 - Not Available error."

When experiencing this error, retry the request once your session reconnects.