How to post to LinkedIn from ChatGPT, and schedule the posts

Set it up and post, step by step

Prompt to copy once LinkedIn is connected: Write a LinkedIn post about the three things we learned launching our pricing page, show it to me, and schedule it for Tuesday at 8:30 my time.

1. Add PostWire as a custom connector

   If your ChatGPT plan offers developer mode, turn it on under Settings → Security and login, then under Settings → Connectors add a custom connector with the URL https://postwire.io/api/mcp and sign in when asked (OAuth). Menu names in ChatGPT change often; OpenAI's help page has the current path. PostWire is not in ChatGPT's app directory yet (submitted to OpenAI's review on Sept 27, 2026). Not available on your plan? Use PostWire in Claude, where it is in the connector directory.

2. Sign in with your email

   A 6-digit code creates your free PostWire account inside the sign-in window: no password and no card. ChatGPT asks you to confirm a write action such as publishing before it runs.

3. Connect your LinkedIn profile

   Ask "connect my LinkedIn". The connector calls create_connect_link and returns a one-hour link; open it, sign in on LinkedIn's own page and press Allow. PostWire asks LinkedIn only for permission to post as you (w_member_social), plus your name and photo to show which profile is connected.

4. Ask for the post

   "Write a LinkedIn post about the bug we fixed today." generate_posts returns a draft and publishes nothing. It is written for LinkedIn: first person, the hook in the first 210 characters (about two lines, what the feed shows before "see more"), short paragraphs, up to 3 hashtags at the end and a question to close. A link goes in the first comment, not in the body, where LinkedIn shows it less. Ask for changes in plain words until it reads right, or for the Facebook and Bluesky versions in the same message.

5. Add images or a PDF carousel, if you want them

   Up to 20 images in one post, or one PDF (or PowerPoint or Word file) on its own, which LinkedIn shows as a document you swipe through. A file attached to the chat does not reach a connector, so ask for an upload page (create_upload_link, up to 100 MB on the free plan and 1 GB on paid plans) and pick the files there, or give a public https link.

6. Publish now, or schedule it

   Say "post it" and the assistant calls post_to_social; the result carries the link to the live post and the first comment's status. Say "schedule it for Tuesday at 8:30" and it calls schedule_post, up to 365 days ahead, or with run_at: "next_slot" for your next free posting hour. This is the call:

   {
     "name": "schedule_post",
     "arguments": {
       "platforms": ["linkedin"],
       "per_platform": { "linkedin": {
         "text": "We cut our onboarding from 9 steps to 3.\n\nThe fix was not a new design. …",
         "first_comment": "The full write-up: https://example.com/blog/onboarding-in-3-steps"
       } },
       "run_at": "2026-10-27T08:30:00-05:00"
     }
   }

7. Check the queue

   "What's scheduled on LinkedIn?" calls list_scheduled_posts and "cancel Tuesday's post" calls cancel_scheduled_post; the same queue is on the dashboard's Queue page.

Nothing is published before you say yes: the assistant shows the exact text first, and ChatGPT asks you to confirm the write action. Prefer to set it up by hand first? Open the dashboard, connect the account under Accounts and copy your key under API & MCP.