Letterdrop Letterdrop is a content marketing platform that helps businesses create, manage, and distribute content across multiple channels. It's used by marketing teams and content creators to streamline their workflows and improve content performance. Official docs: https://letterdrop.com/docs Letterdrop Overview - Newsletter - Subscriber - Email - Analytics Use action names and parameters as needed. Working with Letterdrop This skill uses the Membrane CLI ( ) to interact with Letterdrop. Membrane handles authentication and credentials refresh automatically — so you can focus on the integra…