# NumRadar, €9 monthly, Starter, POST /bulk: WhatsApp number check API

> Find out which phone numbers are registered on WhatsApp. Upload a contact list, use the API, connect an AI agent, or check numbers in Chrome.

NumRadar's Starter plan for the WhatsApp number check API costs $2.026 per 1,000 phones. We check each provider's docs for 6 fields. NumRadar's docs list 4: On WhatsApp, Business account, WhatsApp ID, Place.
€1.80 per 1,000 phones is $2.026 at the European Central Bank's rate of $1.1253 for €1.
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 53% 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/numradar/9-monthly-starter-post-bulk
- Get it: https://numradar.app/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- Request: `POST https://api.numradar.app/v1/bulk`
- API key: with the plan, on https://numradar.app/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- Its API docs: https://numradar.app/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- Sold by: NumRadar (https://numradar.app?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing)
- Checked: 2026-11-02

## In the answer

- Completeness: 67%
- On WhatsApp: ✓
- Business account: ✓
- WhatsApp ID: ✓
- Place: ✓

## Price

- $ per 1,000 phones: $2.026
- Per: result
- Billing: monthly
- $ a month: $10.13

## Charges

- Also pays for: nothing else

## Overage

- Units cap: hard

## Not found

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

## In their words

- Their pitch: Find out which phone numbers are registered on WhatsApp. Upload a contact list, use the API, connect an AI agent, or check numbers in Chrome.

## Data

- What it checks: numbering plan, messaging apps
- Keep data: no limit
- Use data: You agree not to use NumRadar: To facilitate unsolicited messaging, bulk automated spam, harassment, or unlawful marketing communications under the TCPA, ePrivacy Directive, GDPR, or applicable regional telecommunication laws. [...] To scrape, harvest, or aggregate phone numbers without lawful authorization or consent from the data subjects. [...] To bypass, interfere with, or attempt to overload our rate limits, security safeguards, or infrastructure. [...] To reverse-engineer, decompile, or create derivative competitive works targeting the underlying validation engine. [...] Where you submit phone numbers or other personal data relating to third parties, you act as the controller of that data [...] You are responsible for having a lawful basis to submit the data you send us.

## Plan

- Pay: €9
- You get: 5,000 results a month
- Enough for: 5,000 results a month
- Expires: end of the month

## Rate limit

- Per second: 0.083 (5 a minute)
- Concurrent: 1
- Batch: 5,000

## Speed

- Answer: by polling or webhook

## The call

- You send: one of phones or file
- Method: POST
- Path: /bulk

## About the plan

- Plan: Starter
- Who can get it: anyone with a confirmed email address

## The 41 fields the plan's answer can hold

job ID, job status, numbers submitted, unique numbers, numbers processed, registered count, not registered count, invalid count, error count, validations from prepaid balance, job created at, job finished at, job expires at, job expired at, paused by, stop requested, excluded count, data deleted by, waiting, row number, number status, input number, phone number, valid, registered on WhatsApp, WhatsApp ID, WhatsApp Business account, business name, business verification level, WhatsApp Business API, small business account, WhatsApp link, line type, WhatsApp sendable, country code, country name, country prefix, country flag, country currency, country languages, country timezones

## NumRadar's plans (5)

- [NumRadar, €9 monthly, Starter, POST /bulk](https://datacircle.dev/check-whatsapp-apis/numradar/9-monthly-starter-post-bulk/llms.txt): $2.026 per 1,000, 67% complete
- [NumRadar, €29 monthly, Growth, POST /bulk](https://datacircle.dev/check-whatsapp-apis/numradar/29-monthly-growth-post-bulk/llms.txt): $1.305 per 1,000, 67% complete
- [NumRadar, €99 monthly, Business, POST /bulk](https://datacircle.dev/check-whatsapp-apis/numradar/99-monthly-business-post-bulk/llms.txt): $1.114 per 1,000, 67% complete
- [NumRadar, €249 monthly, Enterprise, POST /bulk](https://datacircle.dev/check-whatsapp-apis/numradar/249-monthly-enterprise-post-bulk/llms.txt): $0.934 per 1,000, 67% complete
- [NumRadar, contact us, Dedicated plan, POST /bulk](https://datacircle.dev/check-whatsapp-apis/numradar/contact-us-dedicated-plan-post-bulk/llms.txt): 67% complete

## NumRadar's calls (2)

- `POST /validate`: [NumRadar, €9 monthly, Starter, POST /validate](https://datacircle.dev/check-whatsapp-apis/numradar/9-monthly-starter-post-validate/llms.txt)
- `POST /bulk`: [NumRadar, €9 monthly, Starter, POST /bulk](https://datacircle.dev/check-whatsapp-apis/numradar/9-monthly-starter-post-bulk/llms.txt)

## NumRadar's APIs (1)

- [NumRadar WhatsApp number check API pricing, 5 plans, POST /bulk](https://datacircle.dev/check-whatsapp-apis/numradar/9-monthly-starter-post-bulk/llms.txt)

## NumRadar: WhatsApp number check API alternatives

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

We list other providers' plans closest to this plan in price per 1,000 phones.

- [WaliChat, $99.90 monthly](https://datacircle.dev/check-whatsapp-apis/walichat/99-90-monthly/llms.txt): $1.998 per 1,000, 67% complete, live
- [2Chat, $480 yearly, Basic Plan, GET /open/whatsapp/check-number/{your-number}/{number-to-check}, Check Number](https://datacircle.dev/check-whatsapp-apis/2chat/480-yearly-basic-plan-get-open-whatsapp-check-number-your-number-number-to-check-check-number/llms.txt): $2.00 per 1,000, 83% complete, live
- [Rapiwa, $5 monthly](https://datacircle.dev/check-whatsapp-apis/rapiwa/5-monthly/llms.txt): $2.00 per 1,000, 17% complete
- [iBlueText, top-up](https://datacircle.dev/check-whatsapp-apis/ibluetext/top-up/llms.txt): $2.00 per 1,000, 17% complete

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-02.

- https://api.numradar.app/v1/plans?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://numradar.app?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://numradar.app/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://numradar.app/docs.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://numradar.app/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://numradar.app/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://numradar.app/pricing.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://numradar.app/privacy?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://numradar.app/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing