Buttondown oEmbed

buttondown.email

Buttondown functions as a newsletter platform designed to help users manage their email communications. Developers can use oEmbed to embed newsletters created on the Buttondown platform with the URL format https://buttondown.email/*. Consumers such as WordPress, Slack, and other CMS or chat platforms can call its oEmbed endpoint to turn Buttondown URLs into rich embeds — without writing custom integration code. Below are the endpoint details, supported URL patterns, and response formats for Buttondown.