Automate TikTok with ChatGPT
TikTok is the only video platform here that will take a landscape or a square cut, not just a vertical one.
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 TikTok is connected
“Write a TikTok caption for this video in my voice, with a hook in the first line.”
“Schedule this TikTok for Friday evening and tell me why that slot.”
“Take the hook from my best TikTok and write three more like it.”
“How are my TikTok posts doing compared to last month?”
What is different about TikTok
Only hereIt is not vertical-only
TikTok accepts 9:16, 16:9 and 1:1. YouTube Shorts takes 9:16 and nothing else, so a cut that posts here will not always go straight to Shorts, and the agent checks before it tries.
One video, and that is the whole post
No images, no carousel, no text-only post. If you ask for a set, the agent tells you at the drafting step rather than building something the publisher will reject.
The largest frame of any platform here
Up to 4096 by 4096, the highest resolution ceiling Antwork will accept anywhere, with ten minutes of runtime at 4 GB. Nothing you export will be too detailed for it.
More caption than the format suggests
The caption runs to 2,200 characters, the same as Instagram. Almost nobody uses it, which is most of the reason a written hook does well here.
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 TikTok that includes writing to the length the format rewards, up to 2,200 characters.
Never leave ChatGPT to post again.
One command, one consent screen, and TikTok is something you can just ask for.