Create localized content
Creates localized broadcast message content by cloning the message’s default content.
locale is required. Fields you provide will override the cloned default. The content field must be exactly one of mjml (email), html (email), text (email and SMS), or payload (push).
Content can only be created while the broadcast is a draft. Duplicate locales are rejected with 409 Conflict.
Authorizations
Accepts either a raw API key or Bearer <key>.
Headers
Optional dated API revision for the request. Must use YYYY-MM-DD format.
^\d{4}-\d{2}-\d{2}$"2026-03-01"
Body
Create localized content by cloning the message's default content. locale
is required; omitted metadata inherits from the cloned default.
Response
Broadcast content created.
Content metadata for a broadcast message (one per locale / default). The
list response omits content; fetch a single record for the body.
BCP-47-style locale tag, or null for the default content variant.
Full body: exactly one of mjml, html, text, or payload is set.

