Out of the box, ChatGPT can write a great tweet but has no way to publish it. Give it access to a connector — either an MCP server or a scheduler with a REST endpoint — and it can queue and publish posts to X as if you'd done it manually.
How the connection works
The connector holds your X credentials on the server side. ChatGPT calls a tool like publish_post with a caption and time; the connector authenticates to X on your behalf and returns the post ID. You keep control by scoping which accounts and actions the connector allows.