# NumDetect, $19.90 pack, Basic, POST /api/v1/checks, Single check, WhatsApp: WhatsApp number check API

> See which apps a phone number uses before you reach out.

NumDetect's Basic plan for the WhatsApp number check API costs $4.00 per 1,000 phones. We check each provider's docs for 6 fields. NumDetect's docs list 2: On WhatsApp, Place.
We haven't run a WhatsApp number check API benchmark yet.
We rank 99 plans for WhatsApp number check APIs by price. Half the plans cost $3.20 or less per 1,000 phones. This plan costs less per 1,000 phones than 34% of the 99 plans.
[ZelNum's $500 pack](https://datacircle.dev/check-whatsapp-apis/zelnum/500-pack-pay-as-you-go-500-top-up-post-detect/llms.txt) costs the least per 1,000 phones: $0.043. [Wawp's €39 yearly plan](https://datacircle.dev/check-whatsapp-apis/wawp/39-yearly/llms.txt) costs the least for 10,000 phones a month: about $3.66.

- This page: https://datacircle.dev/check-whatsapp-apis/numdetect/19-90-pack-basic-post-api-v1-checks-single-check-whatsapp
- Get it: https://numdetect.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- Request: `POST https://api.numdetect.com/api/v1/checks`, Single check, WhatsApp
- API key: with the plan, on https://numdetect.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- Its API docs: https://numdetect.com/docs/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing#single
- Sold by: NumDetect (https://numdetect.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing)
- Checked: 2026-11-12

## In the answer

- Completeness: 33%
- On WhatsApp: ✓
- Place: ✓

## Price

- $ per 1,000 phones: $4.00
- Per: call
- Billing: pay first

## Charges

- Also pays for: from the same budget: Bulk check

## Overage

- Units cap: hard

## Not found

- $ per 1,000 calls that find nothing: $0.00

## In their words

- Their pitch: See which apps a phone number uses before you reach out.

## Data

- Freshness: live
- What it checks: messaging apps
- Keep data: no limit
- Use data: Do not share access in a way that bypasses service limits. [...] Use only data you are entitled to process. Do not use the service for spam, harassment, unlawful surveillance, unauthorized access or attempts to bypass safeguards. Registration and Business signals do not prove identity, ownership, consent, recent activity or guaranteed message delivery. Do not treat unknown as a negative answer or use a signal as the sole basis for a decision with significant effects on a person.

## Plan

- Pay: $19.90
- You get: $19.90
- Enough for: 4,975 calls

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: phone, products "whatsapp", Content-Type header "application/json", Idempotency-Key header. Optional: country
- Method: POST
- Path: /api/v1/checks

## About the plan

- Plan: Basic
- Who can get it: anyone who signs up, no approval step

## The 11 fields the plan's answer can hold

check ID, input type, input, country, amount charged, product ID, status, registered, product price, product amount charged, extra info

## NumDetect's plans (4)

- [NumDetect, $19.90 pack, Basic, POST /api/v1/checks, Single check, WhatsApp](https://datacircle.dev/check-whatsapp-apis/numdetect/19-90-pack-basic-post-api-v1-checks-single-check-whatsapp/llms.txt): $4.00 per 1,000, 33% complete, live
- [NumDetect, $69.90 pack, Plus, POST /api/v1/checks, Single check, WhatsApp](https://datacircle.dev/check-whatsapp-apis/numdetect/69-90-pack-plus-post-api-v1-checks-single-check-whatsapp/llms.txt): $3.784 per 1,000, 33% complete, live
- [NumDetect, $199.90 pack, Professional, POST /api/v1/checks, Single check, WhatsApp](https://datacircle.dev/check-whatsapp-apis/numdetect/199-90-pack-professional-post-api-v1-checks-single-check-whatsapp/llms.txt): $3.636 per 1,000, 33% complete, live
- [NumDetect, $499.90 pack, Scale, POST /api/v1/checks, Single check, WhatsApp](https://datacircle.dev/check-whatsapp-apis/numdetect/499-90-pack-scale-post-api-v1-checks-single-check-whatsapp/llms.txt): $3.333 per 1,000, 33% complete, live

## NumDetect's calls for this API (4)

- `POST /api/v1/bulk-jobs`, Bulk check, WhatsApp: [NumDetect, $19.90 pack, Basic, POST /api/v1/bulk-jobs, Bulk check, WhatsApp](https://datacircle.dev/check-whatsapp-apis/numdetect/19-90-pack-basic-post-api-v1-bulk-jobs-bulk-check-whatsapp/llms.txt)
- `POST /api/v1/bulk-jobs`, Bulk check, WhatsApp Business: [NumDetect, $19.90 pack, Basic, POST /api/v1/bulk-jobs, Bulk check, WhatsApp Business](https://datacircle.dev/check-whatsapp-apis/numdetect/19-90-pack-basic-post-api-v1-bulk-jobs-bulk-check-whatsapp-business/llms.txt)
- `POST /api/v1/checks`, Single check, WhatsApp: [NumDetect, $19.90 pack, Basic, POST /api/v1/checks, Single check, WhatsApp](https://datacircle.dev/check-whatsapp-apis/numdetect/19-90-pack-basic-post-api-v1-checks-single-check-whatsapp/llms.txt)
- `POST /api/v1/checks`, Single check, WhatsApp Business: [NumDetect, $19.90 pack, Basic, POST /api/v1/checks, Single check, WhatsApp Business](https://datacircle.dev/check-whatsapp-apis/numdetect/19-90-pack-basic-post-api-v1-checks-single-check-whatsapp-business/llms.txt)

## NumDetect's APIs (2)

- [NumDetect Phone validation API pricing, 4 plans, POST /api/v1/bulk-jobs, Bulk check, Telegram](https://datacircle.dev/validate-phone-apis/numdetect/19-90-pack-basic-post-api-v1-bulk-jobs-bulk-check-telegram/llms.txt)
- [NumDetect Phone validation API pricing, 4 plans, POST /api/v1/bulk-jobs, Bulk check, Viber](https://datacircle.dev/validate-phone-apis/numdetect/19-90-pack-basic-post-api-v1-bulk-jobs-bulk-check-viber/llms.txt)
- [NumDetect Phone validation API pricing, 4 plans, POST /api/v1/bulk-jobs, Bulk check, Zalo](https://datacircle.dev/validate-phone-apis/numdetect/19-90-pack-basic-post-api-v1-bulk-jobs-bulk-check-zalo/llms.txt)
- [NumDetect Phone validation API pricing, 4 plans, POST /api/v1/checks, Single check, Telegram](https://datacircle.dev/validate-phone-apis/numdetect/19-90-pack-basic-post-api-v1-checks-single-check-telegram/llms.txt)
- [NumDetect Phone validation API pricing, 4 plans, POST /api/v1/checks, Single check, Viber](https://datacircle.dev/validate-phone-apis/numdetect/19-90-pack-basic-post-api-v1-checks-single-check-viber/llms.txt)
- [NumDetect Phone validation API pricing, 4 plans, POST /api/v1/checks, Single check, Zalo](https://datacircle.dev/validate-phone-apis/numdetect/19-90-pack-basic-post-api-v1-checks-single-check-zalo/llms.txt)
- [NumDetect WhatsApp number check API pricing, 4 plans, POST /api/v1/checks, Single check, WhatsApp](https://datacircle.dev/check-whatsapp-apis/numdetect/19-90-pack-basic-post-api-v1-checks-single-check-whatsapp/llms.txt)

## NumDetect: WhatsApp number check API alternatives

[NumDetect alternatives: other WhatsApp number check API providers by price](https://datacircle.dev/numdetect-alternatives.txt)

We list other providers' plans closest to this plan in price per 1,000 phones. Each plan in the list gives live data.

- [NumRadar, €9 monthly, Starter, POST /validate](https://datacircle.dev/check-whatsapp-apis/numradar/9-monthly-starter-post-validate/llms.txt): $2.026 per 1,000, 67% complete, live
- [WaliChat, $69.90 monthly](https://datacircle.dev/check-whatsapp-apis/walichat/69-90-monthly/llms.txt): $2.33 per 1,000, 67% complete, live
- [2Chat, $480 yearly, Basic Plan, GET /open/whatsapp/check-number/{your-number}/{number-to-check}, Check Number, full](https://datacircle.dev/check-whatsapp-apis/2chat/480-yearly-basic-plan-get-open-whatsapp-check-number-your-number-number-to-check-check-number-full/llms.txt): $4.00 per 1,000, 83% complete, live
- [ProWebLook, $400 pack, WhatsApp One-Time 100K, POST /wavalidation/batch](https://datacircle.dev/check-whatsapp-apis/proweblook/400-pack-whatsapp-one-time-100k-post-wavalidation-batch/llms.txt): $4.00 per 1,000, 67% complete, live

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-12.

- https://numdetect.com/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://numdetect.com/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://numdetect.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://numdetect.com/privacy?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://numdetect.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing