60428: Unsupported channel

This error occurs when your Verify request includes a channel value that the endpoint cannot use. For the Verifications create request, use a supported channel value such as sms, call, whatsapp, email, sna, or auto. Some channels also require additional Verify Service setup before you can send a verification.

• The request includes an invalid or misspelled channel value. The Verifications create request only accepts the channel values documented for that endpoint.
• The request uses a Verify authentication method that exists elsewhere in Verify, but not on this Verification request. Verify supports additional methods such as Passkeys, Push, Silent Device Approval, and TOTP through their own product flows.
• The request uses whatsapp, but your Verify setup does not have a WhatsApp sender configured. WhatsApp for Verify requires you to bring your own WhatsApp sender.
• The request uses email, but your Verify Service does not have email configured. Verify email requires a SendGrid integration before you can send email verifications.
• The request uses sna or auto without the required Silent Network Auth setup. SNA requires upfront configuration on your Verify Service.

• Update the channel parameter to a value supported by the Verifications create request. For OTP and phone or email verification requests, use sms, call, whatsapp, email, sna, or auto as documented for that endpoint.
• If you want to use a different Verify authentication method, switch to the API flow for that method instead of the Verifications create request. Review the Verify channel documentation to choose the correct implementation path.
• If you want to send verifications over WhatsApp, configure a WhatsApp sender for Verify before retrying the request.
• If you want to send verifications over email, complete the SendGrid email integration for your Verify Service and then retry with channel=email.
• If you want to use Silent Network Auth, complete the required SNA setup first. If you are using Automatic SMS Fallback, use channel=auto only after that feature is configured for your Service.

• Verification API reference
• Verification Channels
• Send Email Verifications with Verify and Twilio SendGrid