This guide explains how to use iOS Shortcuts to send tweets with images via the Twitter API using OAuth 1.0a authentication.The process involves two main steps: uploading the image to Twitter's media library and posting the tweet with the media_id and text content.A Vercel API is used for HMAC-SHA1 signature generation to simplify the authentication process.Shortcuts App on iOS devices is used to manage inputs and call Twitter's API for sending tweets with images.