Post from Claude and ChatGPT
Connect Crosspostify to your AI app and ask it to publish or schedule posts on your nine platforms. It uses your Crosspostify login and asks you before anything goes out.
MCP server address
https://crosspostify.com/api/mcpIncluded in the Pro and Business plans.
Connect in two minutes
Add the address above in your AI app, sign in to Crosspostify and click Allow.
Claude (claude.ai and Claude Desktop)
- 1Open Settings → Connectors → Add custom connector.
- 2Name it Crosspostify and paste the address above.
- 3Click Connect, sign in to Crosspostify and click Allow.
- 4In a chat, turn the Crosspostify connector on and ask away.
ChatGPT
- 1Open Settings → Apps & Connectors. Until Crosspostify is listed in ChatGPT's app directory, turn on Developer mode under Advanced settings.
- 2Create an app: name Crosspostify, MCP server URL as above, authentication OAuth.
- 3Connect, sign in to Crosspostify and click Allow.
- 4In a chat, add the Crosspostify app and ask away.
Claude Code
- 1Add the server once:
claude mcp add --transport http crosspostify https://crosspostify.com/api/mcp- 2In Claude Code run
/mcp, choose crosspostify and sign in.
Cursor and other MCP apps
- 1Add a remote MCP server with the address above, e.g. in Cursor's
mcp.json: { "mcpServers": { "crosspostify": { "url": "https://crosspostify.com/api/mcp" } } }- 2The app opens the Crosspostify sign-in the first time you use it. Any app that supports remote MCP servers (Streamable HTTP) with OAuth works.
Just ask
A few things you can say once Crosspostify is connected.
What the AI can do for you
Accounts and options
- List your connected social accounts
- List your Pinterest boards
- Read your TikTok posting options (who can view, max video length)
- Show your plan
Media
- Add an image or video from a link
- Create an upload link for a file on your computer
- List your media library
Posts
- Publish now or schedule: video, image, carousel or text
- Platform options: Instagram Stories and trial reels, Facebook Stories and first comment, TikTok privacy and drafts, YouTube privacy, Pinterest board, AI label
- List posts and check a post's status and link
- Change the time of a scheduled post or delete it
Four ways to get your media in
A link
Give the AI a public https link to an image or video (up to 20 MB images, 100 MB videos). Crosspostify downloads it.
A file in the chat
Apps that hand attached files over as a link (ChatGPT) can pass them on directly.
A file on your computer
Claude Code, Cursor and similar apps get a one-time upload link and upload the file themselves.
Your media library
Anything you uploaded in the Crosspostify app is available to the AI by name.
You stay in control
You sign in with your normal Crosspostify login and approve exactly what the app may do. The app never sees your password or API key.
The AI confirms accounts, caption and time with you before posting. TikTok asks you who should see the post and shows TikTok's music notice first.
Everything goes out under your own accounts and follows your plan's limits (the same as the API).
See and revoke connected apps anytime under API → Connected AI apps. Revoking ends access immediately.
Troubleshooting
The app only sees some tools, or none of the new ones
AI apps remember the tool list from when you connected. Refresh the connector in the app's settings (or remove and add it again) and start a new chat.
“Posting through AI apps is part of the Pro and Business plans”
Connecting AI apps is included in Pro and Business. Change your plan in the Crosspostify app, then connect again.
A post went out at the wrong time
Tell the AI your time zone (e.g. “Vienna time”). Crosspostify only accepts times with a time zone, so check the time the AI used before confirming.
“reconnect” in an error message
The login of that social account has expired. Reconnect the account in the Crosspostify app, then try again.
The sign-in page says “This connection link does not work”
Start the connection again from your AI app; the link is only valid for a few minutes and only for the app that created it.
Still stuck? Write to [email protected]. Building your own integration instead? See the API reference.
Let your AI do the posting
Connect Crosspostify in Claude or ChatGPT and publish to nine platforms from one chat. Included in the Pro and Business plans.
No API key needed: you sign in with your Crosspostify account.