This handler function accepts three arguments: context, event, and callback. For this tutorial, you'll need to respond to users dialing your Twilio number.Įvery Twilio function exports a handler function. TwiML, short for Twilio Markup Language, is a way to instruct Twilio on what to do when an event is triggered. In this case, you will use Twilio Functions to return TwiML in response to the webhooks. With it, you can create webhooks to respond to emitted Twilio events. Twilio Functions is a serverless environment maintained and deployed by Twilio’s cloud infrastructure. This service would need to be accessible from a URL. To create a webhook, you’ll have to create a REST service able to handle incoming HTTP requests and perform some function. The event, in this case, would be an incoming phone call to your Twilio phone number. Webhooks are HTTP callbacks that are triggered by an event. To receive calls with a Twilio phone number, you must configure a webhook. If you don’t have one, you can register for a free Twilio account and begin with a free trial number and $10 credit. To get started, you will need a Twilio account.
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