# MegaAPI, R$69.90 monthly: WhatsApp number check API

> Verifica se um número realmente existe no WhatsApp antes de tentar contatá-lo. Evita desperdiçar um envio em um número inválido ou digitado errado.

MegaAPI's Start (1 instance) plan lets you call the WhatsApp number check API. We check each provider's docs for 6 fields. MegaAPI's docs list 1: On WhatsApp.
You pay R$69.90 a month. MegaAPI limits how many calls you get but gives no number.
We haven't run a WhatsApp number check API benchmark yet.
This plan costs R$69.90 a month. 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/megaapi/r-69-90-monthly
- Get it: https://megaapi.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- Request: `GET https://apistart01.megaapi.com.br/rest/instance/isOnWhatsApp/{instance_key}`
- API key: with the plan, on https://megaapi.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- Its API docs: https://megaapi.io/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing#endpoint-instance-instance-key-20
- Sold by: MegaAPI (https://megaapi.io?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing)
- Checked: 2026-11-09

## In the answer

- Completeness: 17%
- On WhatsApp: ✓

## Price

- Per: call
- Billing: monthly
- $ a month: $13.75

## Charges

- Also pays for: Apagar mensagem · Apagar mensagem enviada por você · Exibir digitando ou gravando · Marcar mensagem como lida · Adicionar participantes ao grupo · Criar grupo · Ver informações do grupo · Listar grupos e comunidades · Ver informações do convite · Sair do grupo · Remover participantes do grupo · Verificar limites de envio · Verificar status da instância · Baixar mídia de mensagem · Ver foto de perfil · Obter QR Code de conexão · Obter QR Code como imagem · Obter QR Code como Base64 · Obter código de pareamento · Listar contatos · Mapear identificadores e números de telefone · Desconectar a instância · Reiniciar a instância · Enviar mensagem com botões · Enviar contato · Encaminhar mensagem · Enviar menu de opções · Enviar localização · Enviar arquivo por Base64 · Enviar arquivo por URL · Responder citando mensagem · Enviar link com pré-visualização · Enviar botões de modelo · Enviar mensagem de texto · Configurar webhook · Ver configuração do webhook

## Not found

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

## In their words

- Their pitch: Verifica se um número realmente existe no WhatsApp antes de tentar contatá-lo. Evita desperdiçar um envio em um número inválido ou digitado errado.

## Data

- Freshness: live
- What it checks: messaging apps
- Keep data: no limit
- Use data: É vedado ao Contratante: Enviar mensagens não solicitadas (spam) ou em massa sem opt-in dos destinatários. Utilizar a plataforma para fins ilícitos, fraudulentos, difamatórios ou discriminatórios. Compartilhar, revender ou sublicenciar o acesso à API sem autorização expressa. Tentar contornar limites técnicos, de segurança ou de uso da plataforma. Enviar conteúdo que promova violência, ódio, material adulto ou conteúdo ilegal.

## Plan

- Pay: R$69.90

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: instance_key. Optional: jid
- Method: GET
- Path: /rest/instance/isOnWhatsApp/{instance_key}

## About the plan

- Plan: Start (1 instance)
- Who can get it: anyone with a WhatsApp number to connect

## The only field the plan's answer can hold

registered on WhatsApp

## MegaAPI's plans (5)

- [MegaAPI, R$69.90 monthly](https://datacircle.dev/check-whatsapp-apis/megaapi/r-69-90-monthly/llms.txt): 17% complete, live
- [MegaAPI, R$99.90 monthly, Business (1 instance)](https://datacircle.dev/check-whatsapp-apis/megaapi/r-99-90-monthly-business-1-instance/llms.txt): 17% complete, live
- [MegaAPI, R$99.90 monthly, Start (3 instances)](https://datacircle.dev/check-whatsapp-apis/megaapi/r-99-90-monthly-start-3-instances/llms.txt): 17% complete, live
- [MegaAPI, R$139.90 monthly](https://datacircle.dev/check-whatsapp-apis/megaapi/r-139-90-monthly/llms.txt): 17% complete, live
- [MegaAPI, contact us](https://datacircle.dev/check-whatsapp-apis/megaapi/contact-us/llms.txt): 17% complete, live

## MegaAPI's calls (1)

- `GET /rest/instance/isOnWhatsApp/{instance_key}`: [MegaAPI, R$69.90 monthly](https://datacircle.dev/check-whatsapp-apis/megaapi/r-69-90-monthly/llms.txt)

## MegaAPI's APIs (1)

- [MegaAPI WhatsApp number check API pricing, 5 plans](https://datacircle.dev/check-whatsapp-apis/megaapi/r-69-90-monthly/llms.txt)

## MegaAPI: WhatsApp number check API alternatives

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

We list other providers' plans billed monthly. Each plan in the list gives live data.

- [Tamz, R$497 monthly](https://datacircle.dev/check-whatsapp-apis/tamz/r-497-monthly/llms.txt): 33% complete, live
- [WAME API, $59.90 monthly](https://datacircle.dev/check-whatsapp-apis/wame-api/59-90-monthly/llms.txt): 33% complete, live
- [Periskope, $35 monthly](https://datacircle.dev/check-whatsapp-apis/periskope/35-monthly/llms.txt): 17% complete, live
- [WSAPI, $5 monthly, Single Instance, GET /users/{phone}/check](https://datacircle.dev/check-whatsapp-apis/wsapi/5-monthly-single-instance-get-users-phone-check/llms.txt): 17% complete, live
- [Fonnte, $2.50 monthly](https://datacircle.dev/check-whatsapp-apis/fonnte/2-50-monthly/llms.txt): 17% 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 2026-11-09.

- https://apibusiness1.megaapi.com.br/docs/swagger.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://megaapi.io/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://megaapi.io/lgpd?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://megaapi.io/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://megaapi.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing