Twilio SendGrid provides both a v2 and v3 API. Currently, our v2 API reference is hosted here on the Twilio docs. To access all the latest features and upcoming developments, please see our external Twilio SendGrid v3 API Reference.
You can send email by using the mail send endpoint in our Web API v3. For more information on how to begin sending email using this endpoint, please visit the v3 Mail Send Overview.
You can also still use our Web API v2 mail send endpoint to send email.