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The important point in this case is the webhook binding. Webhook is the type of script that provides requests transition from the messenger platform to the chatbot (event subscription). Its aim is to notify about all the chat actions including messages, button clicks, etc. To work with webhook with all the popular messengers, you need the SSL certificate published by a rightful authority. Also, you should generate a token used for requests to the messenger API.
Discussing how to build a chatbot, we should note that in most cases, such programming languages as Node.js and PHP are used. Anyway, it is up to developer which language to choose, as Python and Java also suit such apps well. On this stage, the module for the chatbot itself is built.
Chatbot development
