Checking if the number has Whatsapp

How to check if a client's phone is connected to WhatsApp?

You will need the token of your phone-connected channel. And then the method in our documentation:

In the parameters you need to specify "blocking": "wait" for the request. This allows you to wait for the check result and get a correct response.

And specify the contacts you need in the contacts parameter. invalid status implies that the number does not have WhatsApp.

Accordingly, you can copy the code snippet and use it in your work. Adding additional pauses and limits to it to reduce the risks of blocking.

We have a very simple source for the bulk checker on GitHub:

Instructions: WhatsApp Phone Number Checker

Preparing the number for mass checks

We also advise you to warm up the number before mass checking: Warming Up New Phone Numbers for WhatsApp API

Balancing of requests between channels

Mass activity requires the use of multiple channels at once to achieve very fast results. It doesn't matter if you use 2 or 100 channels in your mass mailings or mass number checks. The balancer will allow you to evenly distribute your requests, get results efficiently, and in case of any problems on a channel, report it to you. Blocking a number in this case will not affect your work process.

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