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WhatsApp Batch Number Check API: Validate up to 10 Numbers per Request
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One GET call to check a comma-separated list of WhatsApp numbers, with a unified API Key and pay-per-credit billing
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INTRODUCTION
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WhatsApp is a core channel for customer contact, registration and marketing. For apps that handle phone numbers, a basic question comes up again and again: is this number actually on WhatsApp, and is it a personal or business account? Checking numbers one by one adds latency and makes call volume hard to control. A WhatsApp batch validation API and number data interface solves this by returning results for a small batch in a single request.
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FEATURED API
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Global API Gateway offers the "Batch Check (up to 10 numbers)" endpoint under its WhatsApp Number Validation & Profile Lookup APIs. It is a GET endpoint:
GET /api/project/whatsapp/batch-check-10
It checks up to 10 phone numbers on WhatsApp per request. The page documents one required parameter, accounts, a comma-separated list of full international numbers. For each number, the response returns two fields:
• exist: whether the number is registered on WhatsApp
• isBusiness: whether it is a business account
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WHAT CAN BE INTEGRATED
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• Batch validation: submit up to 10 numbers in one call to cut round-trips
• Existence check: use exist to see which numbers are reachable on WhatsApp
• Account type: use isBusiness to tell business accounts from personal ones
• Simple input: pass accounts as a comma-separated list, for example 551121770100,5511999999999
• Fast testing: try the call in the browser, or copy the cURL example into your own scripts
• Companion endpoints: check active status, check existence by full number or by country code + phone, and get About / status text
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USE CASES
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[1] List cleaning
• Validate and clean imported phone lists in batches
• Re-validate stored contacts periodically
[2] Lead qualification
• Bulk-qualify leads before a campaign launches
• Separate business accounts from personal ones for different outreach
[3] Registration risk control
• Check whether a number has a WhatsApp account at sign-up
• Filter out invalid numbers before they enter your user base
[4] CRM data hygiene
• Flag unreachable numbers in customer records
• Keep contact data fresh with scheduled re-checks
[5] Messaging pipelines
• Run an existence check before sending, so you don't waste effort on numbers not on WhatsApp
• Use it with the related lookup endpoints for deeper profile checks
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PRICING & GETTING STARTED
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✓ One API Key for all endpoints, billed by credits; different endpoints consume different amounts of credits
✓ New accounts get 100 free credits on sign-up, with no credit card required; credits never expire
✓ Payment goes through Stripe, and unused credits are refundable
✓ The online testing tool lets you run the endpoint straight from the page after you log in
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CONCLUSION
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If you need a WhatsApp batch check API that returns exist and isBusiness for up to 10 numbers per call, this endpoint is a lightweight, easy-to-integrate choice. Try it free and read the docs here:
https://opendata-api.com/en/whatsapp/batch-check-10.html
