Practical guides on one thing: checking whether a phone number is registered on WhatsApp and using that result. Learn how to integrate the check, store and refresh results, and read them correctly — without mistaking a request error for "not registered".
Integrate the synchronous WA Lookup API for CRM data hygiene. Verify WhatsApp account presence, avatars, and business status using E.164 formatted numbers.
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Learn how to integrate the WA Lookup API for synchronous WhatsApp profile enrichment, avatar retrieval, and business account checks using E.164 numbers.
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Compare format validation vs live phone verification to understand when to use syntax checks and when to rely on synchronous platform registration signals.
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Learn how to replace complex WhatsApp call webhook integration with a synchronous REST API for real-time account-presence signals and CRM routing workflows.
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Prepare a CSV or TXT list of phone numbers for realtime WhatsApp checks with WA Lookup: E.164 formatting, choosing a service type, and up to 100 numbers per synchronous request.
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Learn how to programmatically manage WhatsApp business usernames using synchronous API checks for registration, avatars, and business account signals.
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Learn how to support WhatsApp sender reputation management by verifying registration status and account types using synchronous API checks.
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All three WA Lookup WhatsApp checks use one synchronous call and differ only in the service_type value. Here is how to pick the right one.
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How CRM administrators wire WA Lookup's ws_avatar check into a contact-enrichment flow, including where to store results and when to refresh them.
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How to store, refresh and safely handle the avatar_url string returned by WA Lookup's ws_avatar service type, including empty values.
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A field-level reference for WA Lookup's ws_avatar service type: the synchronous request contract, the response fields, and what avatar and avatar_url carry.
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Verify phone numbers from a CSV in real time with WA Lookup: E.164 formatting, up to 100 numbers per synchronous request, and account-presence results in the same response.
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