Automate X (Twitter) with ChatGPT
X is the only platform that does not count characters the way you do, and the only one where a GIF is its own kind of attachment.
https://api.antwork.io/mcpChatGPT reaches Antwork through a custom app in Developer mode. It is the longest setup of any client here, and the only one where you build the connector yourself rather than pasting a single line.
Custom connectors are a paid ChatGPT feature, and Developer mode has to be switched on first.
Connect it
- 01Turn on Developer modeSettings, then Apps & Connectors, then Advanced settings. Custom connectors do not appear at all until this is on, which is the usual reason the option seems to be missing.
- 02Create the appBack in Apps & Connectors, click Create app. Name it antwork, paste the MCP server URL, set the connection to OAuth, confirm and create.
- 03Turn on memory, then authorizeSwitch on "Reference memories and chats" so ChatGPT keeps your brand voice across conversations, then sign in to authorize Antwork.
What you can say once X (Twitter) is connected
“Draft an X (Twitter) post about what we shipped this week and keep it inside the limit once the link is counted.”
“Turn the opening of this blog post into something for X, in my voice, no hashtags.”
“Attach this GIF to the X draft and schedule it for tomorrow morning.”
“How did my last five posts on X do? Show me impressions and engagement.”
What is different about X (Twitter)
Only hereThe counter does not match yours
X weighs characters rather than counting them. Every URL counts as 23 however long it is, and anything outside the Latin range counts double. Antwork counts the same way the server does, so a draft that fits here is a draft that posts.
A GIF is not an image
X is the only platform where Antwork treats GIF as its own media type with its own ceiling: one per post, up to 15 MB, and never beside a photo or a video.
Four slots, and they do not mix
Up to four images in a post, but images and video can never share one. Ask for both and the agent splits them before it drafts rather than failing at publish.
It takes a PDF, but on its own
X accepts a document post up to 100 MB. Unlike LinkedIn it cannot ride alongside images, so a document here is the whole post or none of it.
Questions
- Do I need an API key to connect ChatGPT?
- No. Antwork connects over OAuth — you approve a consent screen in the browser and you are done. There is no key to generate or paste into a URL, which is how most social MCP servers handle it.
- Do I need a paid account?
- No. Your first two connected accounts are free forever, with unlimited posts and workspaces, and there is no plan gate on MCP access.
- Will ChatGPT post without showing me first?
- Not unless you ask it to. Drafting and publishing are two separate steps: the agent writes, renders the post card, and only publishes when you confirm.
- Does the writing sound like AI?
- Antwork hands the agent that account's recent posts, along with how each performed, and the agent writes to match them. On X (Twitter) that includes writing to the length the format rewards, up to 280 characters.
Never leave ChatGPT to post again.
One command, one consent screen, and X (Twitter) is something you can just ask for.