twilio-content-template-builder

Create a template by calling client.content.v1.contents.create with a friendly name, language, and a types object such as twilio/text containing the body with {{1}} style variables. The response returns a ContentSid starting with HX used to send the template.

Send a template by calling client.messages.create with the from and to numbers, the content_sid parameter set to your HX identifier, and content_variables as a JSON string mapping variable numbers to values.

Yes, WhatsApp templates must be submitted for Meta approval via an approval request with a category of UTILITY, MARKETING, or AUTHENTICATION. Approval typically takes under one hour but can take up to 24 hours, and templates cannot be used outside the 24-hour service window until approved.

Supported types include twilio/text for all channels, twilio/media for WhatsApp, MMS, and RCS, plus quick-reply, call-to-action, list-picker, card, and carousel types for WhatsApp and RCS. RCS templates should include a twilio/text entry as SMS fallback.

Rejections commonly result from incorrect variable formatting, missing sample values, or violating the non-variable to variable ratio rule. A rejected template cannot be resubmitted with the same name, so you must use a different name for resubmission.