Check in real time whether a phone number is registered on WhatsApp. Returns a direct Boolean result so you can validate account existence before messaging, enrich lead lists, or clean contact databases. Single GET with full international number; no guesswork.
API Features
Instant registration lookup Query live availability so you know immediately whether a number can receive WhatsApp messages before sending or updating records
True/false result Single Boolean outcome for simple integration in signup flows, lead scoring, and contact list hygiene logic
Path-only request Supply full international number in the URL path; one GET, no request body or extra query parameters
GDPR-conscious Relies only on public registration signal; no personal data stored or shared, suitable for privacy-aware pipelines
Pre-send gate Use as a gate before campaigns to filter out non-WhatsApp numbers and improve deliverability and cost efficiency
Live API Demo
API Response (JSON)
{} Query Result
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Use Cases
- Pre-campaign check: confirm numbers are on WhatsApp before adding to broadcast or drip campaigns
- List hygiene: bulk-verify existing contacts to flag inactive or non-WhatsApp entries and reduce bounces
- Signup and channel selection: determine WhatsApp availability for OTP or support channel options
- Deliverability optimization: avoid sending to numbers that cannot receive WhatsApp messages
- Routing and support: enrich records with WhatsApp availability for channel-based routing and support