CheckNumber.AI WhatsApp number check API pricing: POST /
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33% complete: 2 of the 6 fields on our checklistSee the 6 fields
$0.00per 1,000 phonesWe haven't run a WhatsApp number check API benchmark yet.This plan is free. We rank 99 plans for WhatsApp number check APIs by price. Half the plans cost $3.20 or less per 1,000 phones.ZelNum's $500 pack costs the least per 1,000 phones: $0.043. Wawp's €39 yearly plan costs the least for 10,000 phones a month: about $3.66.
Plan: Free trial one of CheckNumber.AI's 3 plans
- Free trialFree trial$0.00 per 1,000
- Top-up from $20, Pay as you goPay as you go$0.15 per 1,000
- Contact us, Custom planCustom plan
Call:
POST /, WhatsApp Number Activity one of CheckNumber.AI's 4 calls for this APIPOST /, WhatsApp AdvancedFree trial$0.00 per 1,000v1/ tasks POST /, WhatsApp Age & Gender CheckerFree trial$0.00 per 1,000v1/ tasks POST /, WhatsApp CheckerFree trial$0.00 per 1,000v1/ tasks POST /, WhatsApp Number ActivityFree trial$0.00 per 1,000v1/ tasks
API: WhatsApp number check API one of CheckNumber.AI's 3 APIs
- Email verification API
- Phone validation API
POST /, Band Checkerv1/ tasks - Phone validation API
POST /v1/ phone - Phone validation API
POST /, iMessage Checkerv1/ tasks - Phone validation API
POST /, Line Checkerv1/ tasks - Phone validation API
POST /, Line Profile Checkerv1/ tasks - Phone validation API
POST /, MAX Checkerv1/ tasks - Phone validation API
POST /, MAX Full Profile Checkerv1/ tasks - Phone validation API
POST /, Messenger Checkerv1/ tasks - Phone validation API
POST /, Number Activityv1/ tasks - Phone validation API
POST /, Number Validationv1/ tasks - Phone validation API
POST /, Phone Carrier Bulk Lookupv1/ tasks - Phone validation API
POST /, RCS Checkerv1/ tasks - Phone validation API
POST /, Signal Checkerv1/ tasks - Phone validation API
POST /, Telegram Age & Gender Checkerv1/ tasks - Phone validation API
POST /, Telegram Checkerv1/ tasks - Phone validation API
POST /, Telegram Number Activityv1/ tasks - Phone validation API
POST /, US Carrier Advancedv1/ tasks - Phone validation API
POST /, Viber Age & Gender Checkerv1/ tasks - Phone validation API
POST /, Viber Checkerv1/ tasks - Phone validation API
POST /, Viber Number Activityv1/ tasks - Phone validation API
POST /, Zalo Age & Gender Checkerv1/ tasks - Phone validation API
POST /, Zalo Checkerv1/ tasks - Phone validation API
POST /, Zalo Number Activityv1/ tasks - WhatsApp number check API
About this item
- Freshness. We don't know how fresh this plan's data is.
- 2 of the 6 fields on our checklist. Business account, WhatsApp profile.
- Nothing to pay. You get 1,000 results once.
- One call. You send
filetoPOST /. You setv1/ tasks task_to "ws_active". The call returns a job. You fetch the answer once the job is done.type - Who can get it: anyone who contacts support. Keep data: no limit. Use data: with conditions.
CheckNumber.AI: WhatsApp number check API alternatives
CheckNumber.AI alternatives: other WhatsApp number check API providers by price
The table starts with CheckNumber.AI's cheapest paid plan. Next come plans from other providers with the price per 1,000 phones closest to CheckNumber.AI's.
| CheckNumber.AI, top-up from $20, Pay as you go, POST /v1/tasks, WhatsApp Number Activity | ZelNum, $100 pack, Pay as you go, $100 top-up, POST /detect/file | WasenderAPI, $45 monthly | 2Chat, $100 pack, Extra requests package, GET /open/whatsapp/check-number/{your-number}/{number-to-check}, Check Number | NumDetect, $499.90 pack, Scale, POST /api/v1/bulk-jobs, Bulk check, WhatsApp | |
|---|---|---|---|---|---|
| $ per 1,000 phones | $0.15 | $0.048 | $0.15 | $0.20 | $0.208 |
| Completeness | 33% | 0% | 17% | 83% | 33% |
| Billing | pay first | pay first | monthly | pay first | pay first |
| Pay | $20 | $100 | $45 | $100 | $499.90 |
| Enough for | as many as you pay for | 2,100,000 results | 300,000 calls a month | 500,000 calls | 2,399,600 results |
| Freshness | unknown | unknown | live | live | live |
| Who can get it | anyone | anyone | anyone 18 years or older with a WhatsApp number to link to a session by QR code | customers who have used up their plan's quota | anyone who signs up, no approval step |
Sources
From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-28.
Product details
The key fields this plan's answer can hold, then each filled column in its row on the sheet.
- On WhatsApp, not in the answer
- Business account
- WhatsApp profile
- WhatsApp ID, not in the answer
- Formats, not in the answer
- Place, not in the answer
| $ per 1,000 phones | $0.00 |
|---|---|
| Per | result |
| Billing | free |
| $ per 1,000 calls that find nothing | $0.00 |
|---|
| Their pitch | Check WhatsApp registration and return last-seen time, days since last online and business account status. |
|---|
| Countries | Worldwide |
|---|---|
| What it checks | messaging apps |
| Keep data | no limit |
| Use data | "This license is granted solely for Your internal business purposes" (3.1), "You agree not to (a) license, sublicense, sell, resell, transfer, assign, distribute, or otherwise commercially exploit or make available to any third party the Service in any way, except as expressly permitted by these Terms or an Agreement, (b) modify or make derivative works based upon the Service, (c) reverse engineer, decompile, or disassemble the Service or attempt to gain unauthorized access to the Service or its related systems or networks, or (d) use the Service for any purpose or in any manner that is unlawful (including in violation of the PDPA) or prohibited by these Terms. Furthermore, You agree that any phone numbers or associated data obtained through the Service shall not be used by You or any third party acting on Your behalf to: (i) contact any individual without their prior, express, and informed consent for such contact, in accordance with PDPA requirements, (ii) send unsolicited commercial communications (spam), bulk messages, or any messages in violation of applicable anti-spam laws (including the Singapore Spam Control Act) and the PDPA, (iii) send harassing, abusive, threatening, defamatory, obscene, or otherwise unlawful communications, or (iv) engage in any other practices that violate the privacy or data protection rights of individuals or any applicable laws or regulations, including the PDPA" (3.2) |
| Pay | $0 |
|---|---|
| You get | 1,000 results |
| Enough for | 1,000 results, once |
| Batch | 1,000,000 |
|---|
| Answer | by polling |
|---|
| You send | file, task_type "ws_active" |
|---|---|
| Method | POST |
| Path | /v1/tasks |
| Plan | Free trial |
|---|---|
| Who can get it | anyone who contacts support |
The 5 fields the plan's answer can hold
phone number, activated, last seen, active days, business account