Webcore used to have a free SMS service to send texts, but that is no longer an option. For SMS, you have to pay for a service. I have seen mention of email apps like the one below, but I have not tried them.
Google does say you can use Twilio with Webcore, but you have to pay for that service.
"To use SMS with webCoRE, you can integrate a third-party service like Twilio through a webhook, which involves creating a separate piston to handle sending messages. You'll need to set up a webhook in your smart home platform (like SmartThings or Hubitat), which then makes a REST API call to Twilio to send the message to a specific number. This process requires configuring both the webhook to send the SMS and the API call in the piston to pass variables like the phone number and message content. "
