Claude + Mastodon
Post to Mastodon from Claude
Ask Claude to write and schedule your Mastodon posts. BrokenPost connects the two, follows Mastodon's rules and posts at the time you pick.
How to connect Claude to Mastodon
- 1
Connect Mastodon in BrokenPost. Sign in with your Mastodon account.
- 2
In BrokenPost, open Plugins and click Add to Claude.
- 3
Claude opens the BrokenPost connector. Click connect.
- 4
Sign in to BrokenPost when asked and allow access.
- 5
Ask Claude to schedule a post.
Prefer another way? See every way to connect Claude.
What to ask Claude
Type these in a Claude chat. Change the details to fit your posts.
- “Post our release notes on Mastodon tomorrow at 10am as a short thread.”
- “Share this screenshot on Mastodon this afternoon.”
- “Schedule this post on Mastodon, Bluesky and X for Monday morning.”
- “Here are my notes from today. Write a Mastodon post from them and save it as a draft.”
- “What Mastodon posts do I have scheduled for next week?”
What happens next
- 1
You ask in a Claude chat, in plain words.
- 2
Claude lists the channels you connected in BrokenPost and picks your Mastodon account.
- 3
It reads Mastodon's rules and settings from BrokenPost, so the post fits Mastodon's limits before it is written.
- 4
If you shared a picture, a video or a link to one, it uploads it to your media library.
- 5
It creates the post as scheduled, as a draft, or to go out now, and gives you a preview link.
- 6
At the set time BrokenPost publishes it to Mastodon and it shows on your calendar.
Mastodon limits Claude follows
Claude reads these rules from BrokenPost before it writes, so the post fits the first time.
| Characters | 500 characters |
|---|---|
| Media | Pictures or video |
| Threads | Yes, as replies |
If Mastodon rejects a post
Claude sees the same message and can fix the post for you.
| What you see | How to fix it |
|---|---|
| The media was still processing when the post was published, please try again | Big videos need time on Mastodon. Retry the post a few minutes later. |
| Your login is currently disabled | Your Mastodon server disabled the account. Sign in on Mastodon to sort it out, then reconnect. |
Good to know
- Each part can have up to 500 characters.
- Big videos take Mastodon a while to process, so upload them well before the post time.
- Claude only posts when you ask. Ask for a draft to check the post in BrokenPost first.
Questions people ask
Can Claude post to Mastodon directly?
Yes, through BrokenPost. Connect Mastodon in BrokenPost, connect BrokenPost to Claude, and Claude can schedule, draft or publish Mastodon posts.
Does Claude know the Mastodon limits?
Yes. Claude reads Mastodon's rules from BrokenPost before it writes: 500 characters and pictures or video. BrokenPost checks again before it posts.
Can Claude schedule Mastodon posts for later?
Yes. Give a day and time, like "Friday at 6pm", and the post goes out then. Ask for a draft if you want to check it first.
Is it free?
Claude with BrokenPost works on every plan. The Free plan includes 1 account on every app and 20 posts a month. Paid plans start at $19 a month with unlimited posts.
Can Claude post a Mastodon thread or comments?
Yes. Ask for a thread or a first comment and BrokenPost posts each part as a reply, right after the first one.
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