PostPublish

Chat assistant

PostPublish for ChatGPT

Connect through ChatGPT developer mode. Ask in plain words and it writes, checks and schedules posts to Facebook Pages, Instagram, Threads, X, LinkedIn and Telegram.

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Set up ChatGPT

  1. 1

    In ChatGPT's settings, turn on Developer mode (look under the security or sign-in settings).

  2. 2

    Create a new connector. Newer versions call these plugins. Name it PostPublish.

  3. 3

    Paste https://postpublish.pro/api/mcp as the MCP server URL and set authentication to OAuth.

  4. 4

    Sign in to PostPublish, choose a workspace, and approve the permissions, then enable it in a chat.

Developer mode and custom connectors depend on your ChatGPT plan and workspace settings, and menu names change.

Server URL: https://postpublish.pro/api/mcp. OAuth is recommended. If your client cannot do OAuth, create an API key in PostPublish (Settings, then API keys) and send it as a Bearer token; if it only runs local servers, use the stdio bridge with npx mcp-remote.

Example prompts

  • “Draft three posts about our spring menu and schedule them to Facebook, Instagram, LinkedIn and X for this week at 9:00.”
  • “Check this caption against Threads limits and tell me what to trim before scheduling.”
  • “Show everything scheduled for next week and flag days with no post.”
  • “Move tomorrow's Instagram post to Friday at 17:30.”

Troubleshooting

The connector or server does not show up.

Check that the URL is exactly https://postpublish.pro/api/mcp and that your version of ChatGPT supports remote MCP servers. If it only supports local servers, use the stdio bridge (npx mcp-remote).

Sign-in loops or fails.

Make sure you can sign in to app.postpublish.pro in the same browser, and that your workspace's trial or plan is active. If it still fails, remove the connection and add it again.

A post is rejected.

Each network has limits (Threads 500 characters, Instagram 2,200, plus media rules). Ask the agent to preview first; it reports warnings before anything is created.

The agent cannot see my accounts.

Connect your Facebook Pages, Instagram, Threads, X, LinkedIn or Telegram accounts in the PostPublish app first, and check that your role or key can read and write posts.

Revoke access

  • Remove the PostPublish connection in ChatGPT's MCP or connectors settings.
  • In the PostPublish app, open Settings, then AI agents, and revoke any key you created for this client. A revoked key stops working immediately.
  • To end an OAuth sign-in, remove the connector in the client. Leaving the workspace ends all access for that user.

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