Automate Pinterest with Claude
Pinterest is the only platform here shaped for a tall 2:3 image, and the only one that will take a 32 MB one.
https://api.antwork.io/mcpClaude connects to Antwork as a custom connector: one URL pasted into the Add custom connector dialog, then a browser authorization. The same connector works in Claude Desktop once you are signed in.
Custom connectors need Claude Pro, Max, Team or Enterprise.
Connect it
What you can say once Pinterest is connected
You see it before it goes out
Antwork does not answer with a wall of text. It renders real, clickable panels inside Claude — the same interface you would get in a dashboard, in the conversation you are already in. No other social tool does this.
- 01A post card with the draft, editable in place, with the publish and schedule buttons on it
- 02A month calendar of everything scheduled across every connected account
- 03Your media library as a thumbnail grid you can attach from
- 04A connections panel with a Connect button per platform
- 05A table of recent posts you can click into
Shipped something small this week that fixed a big thing. Our token refresh ran daily but checked Pinterest against a five minute expiry window, so it could only ever catch a token that happened to die inside those five minutes. It never did. Accounts just went quiet.
What is different about Pinterest
Two by three
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.
Thirty two megabytes for one image
The largest single image any platform here accepts, four times what Instagram allows. A detailed chart or infographic survives the upload without being flattened.
One pin is one thing
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.
The description is read by search, not by scrollers
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.
Pinterest limits, as the server enforces them
Posts are capped at 800 characters, and the cap is enforced when you schedule or publish, not silently truncated.
- Max size
- 32 MB
- Per post
- 1
- Ceiling
- up to 1000x1500 · 2:3
- Max size
- 2 GB
- Per post
- 1
- Ceiling
- up to 1080x1920 · 15 min max · 9:16
- — 1 media items per post, in total.
- — Images and video can never share a post. Ask for both and it has to be split into two.
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.
Questions
- Do I need an API key to connect Claude?
- 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. The free tier covers one workspace, two connected accounts and 20 posts per cycle, and there is no plan gate on MCP access.
- Will Claude 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 learns a voice profile per connected account by reading what you have already published there, and the agent drafts from that profile. On Pinterest that includes writing to the length the format rewards, up to 800 characters.
Never leave Claude to post again.
One command, one consent screen, and Pinterest is something you can just ask for.