Let’s install Python dependency

pip install requests
pip install flask

Create API to Consume Whatsapp API

from flask import Flask
from flask_restful import Resource, Api
from flask_cors import CORS
import requests

app = Flask(__name__)
CORS(app) ## To allow direct AJAX calls

@app.route('/getGroups', methods=['GET'])
def home():
   try:        
    headers = {'Authorization': 'Bearer your-auth-token', 'Content-Type': 'application/json'}
    res = requests.post('https://your-webapp-hostname:your-webapp-port/v1/groups', headers=headers)

    return r.json()

   except Exception as e:
    print('unable to get groups.')
    print(e.strerror)

if __name__ == '__main__':
   app.run(debug = True)

• URL — The URL of the server along with the API endpoint for the request.
• Method — The action being requested of the endpoint.You can use methods like POST, GET, DELETE, PATCH and PUT.
• Headers — You can add Meta information about the request like request type, token etc.
• Body — This contains the payload data.

{
    "groups": [
       {"id": "group-id1"},
       {"id": "group-id2"}
    ]
}

• HTTP Status Code — Status codes are issued by a server in response to a request made to the server. See HTTP Status Codes for more information.
• Meta — Contains generic information such as WhatsApp Business API Client version.
• Payload — Only returned with a successful response. The payload object name and contents vary based on the request. In the above examples, the payload is contacts because we sent a request to the contacts endpoint.
• Errors — Only returned with a failed request. Contains an array of error objects that are present when there is an error. See the Error Codes for more information.