> ## Documentation Index
> Fetch the complete documentation index at: https://cal.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Twilio

<Steps>
  <Step title="Create a Twilio account">
    Go to [Twilio](https://www.twilio.com/try-twilio) and create a new account.
  </Step>

  <Step title="Get a Twilio phone number">
    Click on 'Get a Twilio phone number' to obtain a phone number for your account.
  </Step>

  <Step title="Save the Account SID">
    Copy the Account SID and add it to your `.env` file under the field:

    ```
    TWILIO_SID
    ```
  </Step>

  <Step title="Save the Auth Token">
    Copy the Auth Token and add it to your `.env` file under the field:

    ```
    TWILIO_TOKEN
    ```
  </Step>

  <Step title="Save the Twilio phone number">
    Copy your Twilio phone number and add it to your `.env` file under the field:

    ```
    TWILIO_PHONE_NUMBER
    ```
  </Step>

  <Step title="Set the Sender ID">
    Add your own sender ID to the `.env` file under the field:

    ```
    NEXT_PUBLIC_SENDER_ID
    ```

    (The fallback is set to "Cal" if not specified.)
  </Step>

  <Step title="Create a Messaging Service">
    Navigate to **Develop** -> **Messaging** -> **Services**, then create a new messaging service.
  </Step>

  <Step title="Name the Messaging Service">
    Choose a name for the messaging service. This can be anything you like.
  </Step>

  <Step title="Add Senders to the Messaging Service">
    Click 'Add Senders' and select 'Phone number' as the sender type.
  </Step>

  <Step title="Add your Twilio phone number as a sender">
    Add the listed phone number to the messaging service.
  </Step>

  <Step title="Complete the Messaging Service setup">
    Leave all other fields as they are, then complete the setup by clicking ‘View my new Messaging Service’.
  </Step>

  <Step title="Save the Messaging Service SID">
    Copy the Messaging Service SID and add it to your `.env` file under the field:

    ```
    TWILIO_MESSAGING_SID
    ```
  </Step>

  <Step title="Create a Verify Service">
    Go to the Twilio dashboard, create a new Verify Service, and name it as you wish.
  </Step>

  <Step title="Save the Verify Service SID">
    Copy the Verify Service SID and add it to your `.env` file under the field:

    ```
    TWILIO_VERIFY_SID
    ```
  </Step>
</Steps>

<Note>
  This app is **required** for Workflows
</Note>