# WaAPI, $10 monthly: WhatsApp number check API

> Send and receive messages, manage chats, groups, and channels easily with our API. Pay per instance, no hidden fees.

WaAPI's Instance plan lets you call the WhatsApp number check API. We check each provider's docs for 6 fields. WaAPI's docs list 1: On WhatsApp.
You pay $10 a month for as many calls as you like.
We haven't run a WhatsApp number check API benchmark yet.
This plan costs $10 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/waapi/10-monthly
- Get it: https://waapi.app/billing-plans?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- Request: `POST https://waapi.app/api/v1/instances/{id}/client/action/is-registered-user`
- API key: with the plan, on https://waapi.app/billing-plans?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- Its API docs: https://waapi.readme.io/reference/is-registered-user?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- Sold by: WaAPI (https://waapi.app?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing)
- Checked: 2026-11-02

## In the answer

- Completeness: 17%
- On WhatsApp: ✓

## Price

- $ per 1,000 phones: no limit
- Per: call
- Billing: monthly
- $ a month: $10

## Charges

- Also pays for: 143 other WaAPI calls

## Not found

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

## In their words

- Their pitch: Send and receive messages, manage chats, groups, and channels easily with our API. Pay per instance, no hidden fees.

## Data

- What it checks: messaging apps
- Keep data: no limit
- Use data: 5. Acceptable use: You must not use the service to send unsolicited bulk messages, to message people who have not agreed to hear from you, or for fraud, phishing, impersonation, harassment or any unlawful purpose. You must comply with the rules of the messaging platform you connect, and with the marketing and data-protection law that applies to you and to the people you message — including obtaining consent where it is required. [...] 9. Intellectual property: The service and the software we run to provide it remain ours and are not licensed to you. What you receive is a non-exclusive, non-transferable right to use the hosted service during your subscription, for your own business purposes. [...] You keep all rights in your own content and data. You may not resell, sublicense or white-label the hosted service without our written agreement, nor copy, decompile or reverse-engineer it except where the law expressly permits.

## Plan

- Pay: $10
- Enough for: no limit

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: id, contactId
- Method: POST
- Path: /instances/{id}/client/action/is-registered-user

## About the plan

- Plan: Instance
- Who can get it: anyone legally able to enter into a contract and entitled to use every messaging account they connect, the service is intended for business and professional use

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

registered on WhatsApp

## WaAPI's plans (1)

- [WaAPI, $10 monthly](https://datacircle.dev/check-whatsapp-apis/waapi/10-monthly/llms.txt): no limit, 17% complete

## WaAPI's calls (1)

- `POST /instances/{id}/client/action/is-registered-user`: [WaAPI, $10 monthly](https://datacircle.dev/check-whatsapp-apis/waapi/10-monthly/llms.txt)

## WaAPI's APIs (1)

- [WaAPI WhatsApp number check API pricing, 1 plan](https://datacircle.dev/check-whatsapp-apis/waapi/10-monthly/llms.txt)

## WaAPI: WhatsApp number check API alternatives

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

No plan below lists a price per 1,000 phones.

- [Whapi.Cloud, $35 monthly](https://datacircle.dev/check-whatsapp-apis/whapi-cloud/35-monthly/llms.txt): no limit, 17% complete, stored
- [Woowa, $14 monthly](https://datacircle.dev/check-whatsapp-apis/woowa/14-monthly/llms.txt): no limit, 17% complete
- [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
- [StarSender, Rp599,000 pack](https://datacircle.dev/check-whatsapp-apis/starsender/rp599000-pack/llms.txt): 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://waapi.app?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://waapi.app/billing-plans?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://waapi.app/legal/general-terms-of-use?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://waapi.readme.io/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://waapi.readme.io/reference/is-registered-user?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing
- https://waapi.readme.io/reference/waapi-api-documentation?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=whatsapp-number-check-api-pricing