# Nock, free: WhatsApp number check API

> Recebe até 100 celulares e diz, para cada um, se tem WhatsApp (true), não tem (false) ou não deu para checar (null).

Nock's Teste grátis plan for the WhatsApp number check API costs $0.00 per 1,000 phones. We check each provider's docs for 6 fields. Nock's docs list 1: On WhatsApp.
We 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](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/nock/free
- Get it: https://usenock.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- Request: `POST https://api.usenock.com/v1/api/enrich/check-whatsapp`
- API key: with the plan, on https://usenock.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- Its API docs: https://api.usenock.com/v1/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- Sold by: Nock (https://usenock.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing)
- Checked: 2026-11-08

## In the answer

- Completeness: 17%
- On WhatsApp: ✓

## Price

- $ per 1,000 phones: $0.00
- Per: result
- Billing: free

## Charges

- Also pays for: from the same budget: Buscar pessoas · Buscar empresas · Enriquecer uma pessoa ou empresa · Identificar empresa e pessoa de um cadastro · Descobrir de quem é um celular · Achar quem decide numa pequena empresa

## Overage

- Units cap: hard

## Not found

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

## In their words

- Their pitch: Recebe até 100 celulares e diz, para cada um, se tem WhatsApp (true), não tem (false) ou não deu para checar (null).

## Data

- Freshness: live
- What it checks: messaging apps
- Keep data: no limit
- Use data: 3: Você pode utilizar a Nock para fins profissionais legítimos, inclusive pesquisa comercial, enriquecimento de dados e prospecção. Você é responsável por definir a base legal e observar as regras aplicáveis às suas abordagens, mensagens, bases de contatos e contas conectadas, incluindo a LGPD e os termos do Google, Microsoft, LinkedIn, Slack, HubSpot, Salesforce e de qualquer cliente MCP que você use. Você não pode utilizar a plataforma para: violar leis, direitos de terceiros ou obrigações contratuais, enviar spam, fraude, assédio, abuso ou comunicação ilegal, tomar decisões proibidas ou discriminatórias com dados pessoais, buscar ou tratar categorias sensíveis sem fundamento adequado, contornar limites, segurança ou mecanismos de cobrança e consumo, fazer scraping, revender ou explorar a plataforma ou dados de provedores sem autorização, usar a Nock como agência ou prestador de serviço para prospectar, enriquecer ou abordar em nome de terceiros, ou revender acesso, resultados ou dados, contas, workspaces e créditos servem só à sua própria organização, usar canais conectados em desacordo com as regras do próprio provedor, inclusive LinkedIn, Gmail, Slack ou políticas de uso de CRMs.

## Plan

- Pay: R$0
- You get: 500 credits
- Enough for: about 166 results, once
- Expires: 7 days

## Rate limit

- Batch: 100

## Speed

- Answer: in the call

## The call

- You send: numbers
- Method: POST
- Path: /api/enrich/check-whatsapp

## About the plan

- Plan: Teste grátis
- Who can get it: anyone with a new account, no card needed (500 free credits for 7 days)

## The 3 fields the plan's answer can hold

number, has WhatsApp, credits charged

## Nock's plans (4)

- [Nock, free](https://datacircle.dev/check-whatsapp-apis/nock/free/llms.txt): $0.00 per 1,000, 17% complete, live
- [Nock, R$299 monthly](https://datacircle.dev/check-whatsapp-apis/nock/r-299-monthly/llms.txt): $70.59 per 1,000, 17% complete, live
- [Nock, R$799 monthly](https://datacircle.dev/check-whatsapp-apis/nock/r-799-monthly/llms.txt): $58.948 per 1,000, 17% complete, live
- [Nock, contact us](https://datacircle.dev/check-whatsapp-apis/nock/contact-us/llms.txt): 17% complete, live

## Nock's calls for this API (1)

- `POST /api/enrich/check-whatsapp`: [Nock, free](https://datacircle.dev/check-whatsapp-apis/nock/free/llms.txt)

## Nock's APIs (7)

- [Nock Company discovery API pricing, 4 plans](https://datacircle.dev/company-discovery-apis/nock/free/llms.txt)
- [Nock Company hierarchy API pricing, 4 plans](https://datacircle.dev/company-hierarchy-apis/nock/free/llms.txt)
- [Nock Email finder API pricing, 4 plans](https://datacircle.dev/find-email-apis/nock/free/llms.txt)
- [Nock Phone finder API pricing, 4 plans](https://datacircle.dev/find-phone-apis/nock/free/llms.txt)
- [Nock People search API pricing, 4 plans](https://datacircle.dev/people-search-apis/nock/free/llms.txt)
- [Nock WhatsApp number check API pricing, 4 plans](https://datacircle.dev/check-whatsapp-apis/nock/free/llms.txt)
- [Nock Company enrichment API pricing, 4 plans, POST /api/companies/cnpj/batch](https://datacircle.dev/company-enrichment-apis/nock/free-teste-gratis-post-api-companies-cnpj-batch/llms.txt)
- [Nock Company enrichment API pricing, 4 plans, POST /api/companies/domain/batch](https://datacircle.dev/company-enrichment-apis/nock/free-teste-gratis-post-api-companies-domain-batch/llms.txt)
- [Nock Company enrichment API pricing, 4 plans, GET /api/companies/cnpj/{cnpj}](https://datacircle.dev/company-enrichment-apis/nock/free-teste-gratis-get-api-companies-cnpj-cnpj/llms.txt)
- [Nock Company enrichment API pricing, 4 plans, POST /api/enrich/identify](https://datacircle.dev/company-enrichment-apis/nock/free-teste-gratis-post-api-enrich-identify/llms.txt)

## Nock: WhatsApp number check API alternatives

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

We list Nock's cheapest paid plan first. Next we list other providers' plans closest to Nock in price per 1,000 phones. Each plan in the list gives live data.

- [Nock, R$799 monthly](https://datacircle.dev/check-whatsapp-apis/nock/r-799-monthly/llms.txt): $58.948 per 1,000, 17% complete, live
- [WbizTool, $59 monthly, Standard, POST /number-checks](https://datacircle.dev/check-whatsapp-apis/wbiztool/59-monthly-standard-post-number-checks/llms.txt): $11.80 per 1,000, 17% complete, live
- [ProWebLook, $9.99 pack, WhatsApp One-Time 500, GET /wavalidation](https://datacircle.dev/check-whatsapp-apis/proweblook/9-99-pack-whatsapp-one-time-500-get-wavalidation/llms.txt): $19.98 per 1,000, 67% complete, live
- [Listar, top-up from €10](https://datacircle.dev/check-whatsapp-apis/listar/top-up-from-10/llms.txt): $22.506 per 1,000, 50% complete, live
- [2Chat, $40 monthly, Single Plan, GET /open/whatsapp/check-number/{your-number}/{number-to-check}, Check Number, full](https://datacircle.dev/check-whatsapp-apis/2chat/40-monthly-single-plan-get-open-whatsapp-check-number-your-number-number-to-check-check-number-full/llms.txt): $40.00 per 1,000, 83% 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 2026-11-08.

- https://api.usenock.com/v1/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://usenock.com/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://usenock.com/developers.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://usenock.com/docs/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://usenock.com/docs/api.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://usenock.com/guias/api-e-mcp-de-prospeccao?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://usenock.com/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://usenock.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://usenock.com/pricing.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://usenock.com/privacy?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://usenock.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing