This project uses 2Chat's public API to verify if a given phone number has a WhatsApp account.

It takes as input a CSV file containing the numbers to check, and it outputs another CSV file with the results returned by the API.

For more information about the API in use here, please check 2Chat's developer portal.

• A 2Chat account. You can create one here.

• A WhatsApp number connected to your account. You can learn how to connect one here.

• Your 2Chat API key. Learn where to obtain it here.

This is a Node script written in Javascript.

To run it, clone this repository and:

• Create a file named .env with your API key in it:

API_KEY=<your API key here>

• Install the dependencies:

$ npm install

• Create a file with the numbers you want to check. For example, my-numbers-to-check.csv and use the following format:

+17137157533
+525511223344
+31206490787

• Call the script with the configured parameters:

Options:
 --help Show help [boolean]
 --version Show version number [boolean]
 --input-file, --in Input file containing the list of numbers you want
 to verify [string] [required]
 --output-file, --out Output file where the script will append the result
 of each number verification [string] [required]
 --source-number, --number The number connected to 2Chat you want to use to
 run this script and perform the number
 verifications [string] [required]

--number must be the number you connected to your 2Chat account. For example, +17137157533.

$ node check-number.js --in=my-numbers-to-check.csv --out=verification-results.csv --number=+17137157533

• Check the output file for the results:

$ cat verification-results.csv

We recommend you run a single instance of this script for every connected number on your 2Chat account to achieve faster speeds.

Your account may be rate-limited during the trial period.

If you encounter issues or have any problems, please reach out to our support channels at 2Chat.co.