Posts
Posts written for Mastodon, without the hooks and hashtag piles that work elsewhere.
Works in Claude, ChatGPT and 11 more AI apps
Post to Mastodon with Claude
To post to Mastodon with Claude, connect your Mastodon account on any server to RobinReach, then add RobinReach to Claude as a connector at https://robinreach.com/mcp/v1/messages. Claude can then write posts in a plain, conversational voice, add replies under them, attach photos or a video and schedule them alongside your other networks, all from the chat. It can also read how your posts perform. The same works in ChatGPT and other AI apps, on the Bloom, Thrive and Scale plans.
- 500 characters
- Analytics in the chat
- From Bloom $24 a month
Post our release notes to Mastodon at noon as a short post, with two replies covering the details.
- Checked the post and both replies against Mastodon's limit
posts_validate - Scheduled for 12:00 with two replies
posts_create
It goes out at noon. The first post says what changed and why it matters, and the two replies cover the fixes and the link to the full notes. Want the same news on Bluesky?
Your brand on Mastodon
Version 4.2 is out. Faster search, and exports finally keep your folders. Details in the replies.
What you can post
What Claude can do on Mastodon
Reply chains
Replies that go up right after your post, for longer updates.
Photos and video
Several photos or a short video per post.
Any server
Works with your account on mastodon.social or any other server.
Checked before saving
Mastodon rules, built in
RobinReach checks every post against these before it is saved, so your AI fixes a problem in the chat instead of finding out when the post fails.
- Characters
- 500, or what your server allows
- Photos
- Up to 4 per post (JPG, PNG, GIF or WebP)
- Video
- MP4 or WebM up to 40 MB
- Comments under the post
- Up to 10, written with the post and published after it
- Posts a day
- Up to 30 per account
- Delete after publishing
- Yes, from the chat
- Analytics in the chat
- Reach and engagement per post, top posts and weekly comparisons
- Comments inbox
- Not available
Read from RobinReach's own checks each time this page loads.
Try saying
Things to ask about Mastodon
Post the same update to Mastodon, Bluesky and Threads, each in its own style.
Write a weekly Monday post about what we shipped, from our changelog.
Which Mastodon posts got the most boosts this month?
Schedule a reply chain of three posts explaining our privacy changes.
Two minute setup
Connect Mastodon to Claude
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Connect Mastodon to RobinReach
Create a free RobinReach account and connect Mastodon from the dashboard.
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Add RobinReach to your AI app
In Claude or ChatGPT, add a connector with the URL https://robinreach.com/mcp/v1/messages and sign in to RobinReach. Coding tools and agents use the same URL with an API key.
https://robinreach.com/mcp/v1/messages
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Ask in plain words
Post the same update to Mastodon, Bluesky and Threads, each in its own style.
Step by step guides for your AI app
Questions
Posting to Mastodon with Claude: questions people ask
How do I post to Mastodon with Claude?
Connect your Mastodon account to RobinReach, add RobinReach to Claude as a custom connector with the URL https://robinreach.com/mcp/v1/messages and sign in. Then ask Claude to post or schedule in plain words.
Does it work on my Mastodon server?
Yes. RobinReach connects to accounts on mastodon.social and other servers. Some servers allow longer posts, but RobinReach checks against the standard Mastodon limit so a post fits anywhere.
Can Claude post reply chains?
Yes. Claude writes the post and its replies, and RobinReach publishes them in order.
Can I post the same thing to Bluesky and Threads?
Yes. Ask once and Claude writes a version for each network.
Can ChatGPT post to Mastodon too?
Yes. Add RobinReach to ChatGPT as a custom MCP server and it gets the same tools.
Keep going
More ways to post with AI
Sources and how this page is checked
Last checked on . Setup steps follow each app's own documentation and the Integrations page in RobinReach. RobinReach's numbers on this page, like tools, networks, limits and plans, are read from the product itself every time the page loads, so they are always current.
Let Claude run your Mastodon
Start on the free plan, connect Mastodon, then add RobinReach to Claude, ChatGPT or any AI app.
Free plan, no card. AI integrations from Bloom, $24 a month, with a 7 day trial.