How to post to Bluesky from ChatGPT

Set it up and post, step by step

Prompt to copy once Bluesky is connected: Write a Bluesky thread of 4 posts about our new CSV import with the link in a reply under the last one, show it to me, and schedule it for Thursday at 10am.

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. Create a Bluesky app password

   In Bluesky, open the app passwords page (bsky.app/settings/app-passwords), add one and copy it. It is not your account password, and deleting it in Bluesky disconnects PostWire.

4. Connect Bluesky

   Ask "connect my Bluesky". The connector calls create_connect_link and returns a one-hour link; choose Bluesky there and paste your full handle (name.bsky.social or your own domain) and the app password. PostWire signs in to Bluesky with them before it saves anything, so a wrong handle or password is refused on that page, with what to do about it.

5. Ask for the post or the thread

   "Write a Bluesky post about the new CSV import." generate_posts returns a draft and publishes nothing: within 300 characters, conversational, with one or two specific hashtags at most. Ask for a thread, or give it an idea too long for one post, and it returns text (the hook) plus thread (the posts after it, in order); when the idea has a link, the link comes back in first_comment, to go in a reply under the last post.

6. Add images, if you want them

   A file attached to a ChatGPT message does not reach a connector, so ask for an upload link: create_upload_link returns a page where you pick the images 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 works too.

7. Post now, or schedule it

   Say "post it" and the assistant calls post_to_social; say "schedule it for Thursday at 10am" and it calls schedule_post, up to 365 days ahead, or with run_at: "next_slot". thread holds up to 9 posts after the first, each a reply to the one before, and first_comment is one more reply under the last one. This is the call:

   {
     "name": "schedule_post",
     "arguments": {
       "platforms": ["bluesky"],
       "per_platform": { "bluesky": {
         "text": "our CSV import went from 40 seconds to 6. here is what changed 🧵",
         "thread": [
           "we stopped parsing the whole file before showing a preview.",
           "rows now stream in batches of 500.",
           "and errors name the row and the column. #buildinpublic"
         ],
         "first_comment": "details: https://example.com/changelog/csv-import"
       } },
       "run_at": "2026-11-05T10:00:00-05:00"
     }
   }

8. Open the post

   The result carries the post's link (https://bsky.app/profile/…/post/…) and, for a thread, every post's id. If Bluesky refuses a later post of a thread, the earlier ones stay up and the result says which went out and which did not; nothing is posted twice.

"What's scheduled on Bluesky?" calls list_scheduled_posts, and "cancel Thursday's thread" calls cancel_scheduled_post; the same queue is on the dashboard's Queue page. Prefer to set it up by hand first? Open the dashboard, connect the account under Accounts and copy your key under API & MCP.