# Nock, free: Phone validation 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 phone validation API costs $0.00 per 1,000 phones. We check each provider's docs for 9 fields. Nock's docs list 1: Number.
We haven't run Nock through [our phone validation API benchmark](https://datacircle.dev/best-phone-validation-api.txt) yet.
This plan is free. We rank 1,266 plans for phone validation APIs by price. Half the plans cost $3.55 or less per 1,000 phones. [See the best free phone validation API plan.](https://datacircle.dev/best-phone-validation-api.txt)
[GuGuData's CNY 124 (about $19) monthly plan](https://datacircle.dev/validate-phone-apis/gugudata/cny-124-monthly/llms.txt) is the cheapest paid plan per 1,000 phones. GuGuData's CNY 124 (about $19) monthly plan charges nothing per call. You get as many phones as GuGuData's rate limit allows. [Neutrino API's On-Demand plan](https://datacircle.dev/validate-phone-apis/neutrino-api/pay-as-you-go-on-demand/llms.txt) costs the least for 10,000 phones a month: $0.80.
[Trestle](https://datacircle.dev/validate-phone-apis/trestle/top-up-from-10-self-serve-pay-as-you-go-get-3-0-phone-intel-phone-validation-api/llms.txt), [Data247](https://datacircle.dev/validate-phone-apis/data247/12-pack-membership-get-v3-0-verify247-phone/llms.txt) and [Abstract API](https://datacircle.dev/validate-phone-apis/abstract-api/19-monthly-starter-5000-requests-month/llms.txt) are the best phone validation API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-phone-apis/nock/free
- [Phone validation API: the best of 50+ providers compared](https://datacircle.dev/best-phone-validation-api.txt)
- Get it: https://usenock.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-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=phone-validation-api-pricing
- Its API docs: https://api.usenock.com/v1/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Sold by: Nock (https://usenock.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing)
- Checked: 2026-11-08

## In the answer

- Completeness: 11%
- Number: ✓

## Price

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

## Aggregators

- Aggregators: none

## 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: $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/validate-phone-apis/nock/free/llms.txt): $0.00 per 1,000, 11% complete, live
- [Nock, R$299 monthly](https://datacircle.dev/validate-phone-apis/nock/r-299-monthly/llms.txt): $70.59 per 1,000, 11% complete, live
- [Nock, R$799 monthly](https://datacircle.dev/validate-phone-apis/nock/r-799-monthly/llms.txt): $58.948 per 1,000, 11% complete, live
- [Nock, contact us](https://datacircle.dev/validate-phone-apis/nock/contact-us/llms.txt): 11% complete, live

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

- `POST /api/enrich/check-whatsapp`: [Nock, free](https://datacircle.dev/validate-phone-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: phone validation API pricing, 4 plans](https://datacircle.dev/validate-phone-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: phone validation API alternatives

- [Listar, top-up from €10, Starter, POST /search/verify-phone-ownership](https://datacircle.dev/validate-phone-apis/listar/top-up-from-10-starter-post-search-verify-phone-ownership/llms.txt): $56.265 per 1,000, 67% complete, live
- [Verify550, $60 pack, 10,000 Credits, POST /api/bulkPhoneList](https://datacircle.dev/validate-phone-apis/verify550/60-pack-10000-credits-post-api-bulkphonelist/llms.txt): $60.00 per 1,000, 56% complete, live
- [Defastra, top-up, Pay as you go, next 15,000 requests a month](https://datacircle.dev/validate-phone-apis/defastra/top-up-pay-as-you-go-next-15000-requests-a-month/llms.txt): $60.00 per 1,000, 56% complete, live
- [RealPhoneValidation, top-up from $25](https://datacircle.dev/validate-phone-apis/realphonevalidation/top-up-from-25/llms.txt): $60.00 per 1,000, 44% 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=phone-validation-api-pricing
- https://usenock.com/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://usenock.com/developers.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://usenock.com/docs/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://usenock.com/docs/api.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://usenock.com/guias/api-e-mcp-de-prospeccao?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://usenock.com/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://usenock.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://usenock.com/pricing.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://usenock.com/privacy?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://usenock.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing