Bulk WhatsApp Number Validator API
Validate thousands of phone numbers against WhatsApp in a single job. Ideal for CRM cleaning, list enrichment, lead-gen agencies, and pre-campaign hygiene before launching WhatsApp Business outreach. Upload a CSV, get back a CSV — or stream results over a webhook.
Two ways to run a bulk job
CSV upload
Upload up to 1 million rows in a single CSV. Results returned as a downloadable CSV with one row per number, or streamed to your webhook as they come in.
Programmatic batch
POST an array of numbers. The API returns an immediate job ID and streams per-number results as they complete. Designed for Zapier, Make.com, n8n, and custom integrations.
What each row returns
- isWhatsApp — yes/no flag for existence on WhatsApp.
- isBusiness — personal vs business account flag.
- profilePic — optional URL when public.
- name — optional display name when public.
- error — only present when the number failed validation (malformed, unreachable).
Typical use cases
- Lead-gen agencies — scrub bought lists before reselling or before launching WhatsApp campaigns.
- CRM teams — run a monthly hygiene pass to mark stale numbers.
- E-commerce — validate customer phone numbers at registration or checkout.
- WhatsApp Business API partners — pre-validate lists to reduce template-message rejection rates.
- Spam and fraud — flag disposable numbers and mass-registered signups.
Pricing for bulk workloads
Bulk jobs are billed per number validated. The MEGA tier ($449/mo, 500K requests) is designed for bulk users — $0.005 per number, equivalent to $50 per 10,000 numbers. Pay-As-You-Go crypto credits are available from $40 per 50,000 numbers with 120-day validity for one-off jobs. See the pricing page for the full matrix.
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