How to post to Instagram from ChatGPT

Set it up and post, step by step

1. Add PostWire as a custom connector

   If your ChatGPT plan offers developer mode, add a 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. 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. Prefer to set it up by hand first? Open the dashboard.

3. Connect Instagram

   Ask "connect my Instagram". The connector calls create_connect_link and returns a one-hour link; open it and choose Log in with Instagram (no Facebook Page needed) or connect through a Facebook Page you manage. Instagram's API publishes only from Business or Creator accounts — switching a personal account is free, in the Instagram app's settings. PostWire never sees your password.

4. Hand over the photo or video

   Ask "give me an upload link". create_upload_link returns a page where you pick the file on the phone or laptop that has it (up to 100 MB on the free plan and 1 GB on paid plans); say "uploaded" and the assistant reads it with get_uploaded_file. A public https link to the file works too. For a carousel, hand over each photo or clip — up to 10.

5. Approve the caption

   "Write an Instagram caption for this: we open the new terrace on Saturday." generate_posts returns a draft and publishes nothing: a hook in the first line, a short caption and at most 5 hashtags at the end, within Instagram's 2,200 characters. Ask for the LinkedIn or Facebook version in the same message and each comes back written for that network.

6. Publish, or schedule it

   Say "post it" and the assistant calls post_to_social; "schedule it for Friday at 9" calls schedule_post, and "in my next free slot" uses your queue. Two or more items in media make a carousel:

   {
     "name": "post_to_social",
     "arguments": {
       "platforms": ["instagram"],
       "per_platform": { "instagram": { "text": "The terrace opens Saturday ☀️ …" } },
       "media": [
         { "url": "https://postwire.io/m/…/terrace-1.jpg", "type": "image" },
         { "url": "https://postwire.io/m/…/terrace-2.png", "type": "image" },
         { "url": "https://postwire.io/m/…/walkthrough.mp4", "type": "video" }
       ]
     }
   }

7. Check that it is live

   Instagram processes a video before it can be published. If that takes longer than the call can wait, the result says processing and PostWire publishes it by itself a few minutes later; ask "is it live?" and the assistant calls get_post_status.

Nothing is published before you say yes: the assistant shows the exact caption first. PNG, WebP and AVIF images are converted to JPEG for you, because Instagram's API takes JPEG only — an image ChatGPT generated can go out as it is once it is uploaded.