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WA Lookup

How a realtime check works

Submit one number in the dashboard and it answers instantly, or paste several at once; the API returns single and multi checks in the same response. Every path shares one balance and the same WhatsApp verdict.

Start with the submitted number

Enter the number your workflow wants to check.

Choose only the fields you need

Registration check (ws) returns registration status, avatar check (ws_avatar) adds the avatar, Business check (ws_business) adds the Business account marker.

Collect the result

Single and multi checks return JSON in the same response for your workflow to read immediately.

Read the verification methodology

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Practical articles on WhatsApp checks, API integration, and verification workflows.

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WhatsApp number check FAQ

Answers on WhatsApp products, balance, API access, and failed validations.

How do I check if a number is on WhatsApp?

Submit one number and WA Lookup returns whether it is registered on WhatsApp in the same response. Three realtime products are available: ws (registration), ws_avatar (registration + avatar URL), ws_business (registration + Business account). There is no task queue, no polling and no callbacks. Message content is never checked.

Is the WhatsApp check real time?

Yes. Once a number is submitted, the result comes back in the same HTTP response — no task queue, no polling, no callbacks — and a single number typically answers in about a second. The dashboard, the single-number API and the synchronous multi-number API all run the same WhatsApp verdict against the same balance, so they agree. Each result reflects registration status at the moment of the check; run the check again whenever you need a current answer.

Will the number owner know I checked them?

No. A check never sends a message, call, or notification to the number, and the owner cannot see that it was checked.

Can checking numbers get my WhatsApp account banned?

No. Checks run on WA Lookup's own infrastructure. You never sign in to WhatsApp or scan a QR code, so your own WhatsApp account is not involved and is not at risk.

How is balance charged?

Permanent balance is a one-time purchase and does not renew. 30-day plan balance is valid for 30 days from payment; unused balance expires at the end of the current cycle. Plans renew automatically every 30 days until you turn off auto-renewal. Turning it off stops future charges; the current plan stays usable until it expires. Checks that fail or are undetermined are refunded to the relevant wallet.

How do I get the 100 free checks?

Create a free account — 100 free checks are added to it automatically when you sign up. You can top up at any time.

Which payment methods are supported?

Permanent top-ups can be paid by credit card, other supported card payments, or cryptocurrency. 30-day plans use secure hosted card checkout and renew every 30 days. Card payments carry no extra fee. Cryptocurrency may include a service fee, shown at checkout.

How do I call the WA Lookup API?

Create an API key in Settings, then POST to /api/v1/check with the X-API-Key header, a number and a service_type (ws, ws_avatar or ws_business). The registration result comes back in that same JSON response; several numbers can be sent together through the synchronous multi endpoint.

Does a registered result mean I can contact the number?

No. A result reports the WhatsApp status fields available at the time of the check. You remain responsible for consent, recipient preferences, and applicable platform rules before contacting anyone.