Pinterest is the only platform here shaped for a tall 2:3 image, and the only one that will take a 32 MB one.
{
"mcpServers": {
"antwork": {
"url": "https://api.antwork.io/mcp"
}
}
}Windsurf takes Antwork as a config snippet. It is the only client here where you edit the raw MCP configuration by hand rather than clicking or running anything.
The pin ratio is 2:3 — taller than Instagram’s 4:5 and unlike anything else Antwork posts to. A square crop will publish, but it will not look like a pin next to the ones around it.
The largest single image any platform here accepts, four times what Instagram allows. A detailed chart or infographic survives the upload without being flattened.
A pin holds one image or one video, never a set. Hand the agent a batch and it makes separate pins rather than building a carousel Pinterest will not take.
Eight hundred characters, and Pinterest indexes them. The agent writes the description to be found later rather than to be read in the moment, which is the opposite of how it writes everywhere else.
Posts are capped at 800 characters, and the cap is enforced when you schedule or publish, not silently truncated.
These numbers are read at build time from the same rules file the publishers validate against, so this page cannot claim a limit the server does not enforce.
One command, one consent screen, and Pinterest is something you can just ask for.