MCP servers

Mastodon MCP servers in 2026.No official one, and small open-source ones.

Mastodon has no official MCP server, and its maintainers said in April 2026 they don't plan one. The open-source servers are small, the biggest with 17 GitHub stars: they sign in with an access token or OAuth on your server, and most are read-only until you turn writing on. Hosted schedulers, Breakreach among them, post and schedule from Claude or ChatGPT through Mastodon's own API.

Connect Mastodon to Claude or ChatGPTChecked October 7, 2026. Breakreach is our product.

Claude

Breakreach

Post to Mastodon that Morning Light is out tomorrow, with the pour-over and latte photos

Scheduling on Mastodoncreate_post

Reply to Claude…

Scheduled · Tomorrow, 9:00 AM

northbeam

@northbeam@mastodon.social

now

Morning Light is out tomorrow. Honey, orange and cocoa, our lightest roast yet, brewed here as a pour-over and as a latte.

Mastodon MCP servers compared

	How it connects	What it does	Posts
Breakreach	Hosted. OAuth on your server, any server; OAuth from Claude's and ChatGPT's directories	Posts text with up to 4 photos or a video, scheduled; likes, replies, boosts and followers	Yes, Public posts
cameronrye/activitypub-mcp	Open source, runs on your machine. A login command that runs OAuth on your server	Timelines, search, trends and notifications; posting, media and scheduling once you turn writes on. Also Misskey and Pleroma	When enabled
thenavidm/mastodon-mcp-cli	Open source. Registers its own app on your server and runs OAuth	76 tools: posts, threads, polls, scheduled posts, timelines, search, lists; asks before each write	Yes
VitexSoftware/mcp-server-mastodon	Open source. An access token from Preferences, Development	Timelines, search, notifications, posts with media; read-only until you change it	When enabled
Other schedulers' MCP servers (Buffer, Postiz, Typefully)	Hosted, OAuth or an API key	Mastodon posts among their other networks	Yes

Checked on October 7, 2026, from each project's README, Mastodon's documentation and source, and the schedulers' MCP docs. Breakreach is our product.

Our recommendation

To post to Mastodon from an assistant, use Breakreach.We built it, so here's the case.

Connect Mastodon

Any server: you type it, approve Breakreach there, and the assistant can post
Nothing to install or keep running, and scheduled posts go out with the chat closed
It only asks to read your account and write posts and media, so it can't read your timeline or mentions

When to pick something else. Breakreach posts publicly, without content warnings, alt text, polls or threads, and doesn't read timelines or notifications. For an assistant that browses and answers on Mastodon, the open-source servers above do that on your own machine.

The kinds of Mastodon MCP serverHow each one gets to your account.

Open source, with your token

VitexSoftware/mcp-server-mastodon and smaller servers take an access token you create in Preferences, Development, New application on your server. Simple, within the rules, and you choose the scopes, but you run the server and the token sits in its config.

Open source, with OAuth

cameronrye/activitypub-mcp, the most-starred (17 stars in October 2026), and thenavidm/mastodon-mcp-cli register an app on your server and run OAuth from a login command. Both read a lot, timelines, notifications and search, and keep writing behind a switch or a confirmation.

Hosted schedulers

Breakreach, Buffer, Postiz and Typefully host the server and post through Mastodon's API. You approve the app on your server once; the assistant then schedules posts, and they go out from the scheduler's servers.

What Mastodon's API lets a server doThe rules every server works within.

An app per serverEvery server is its own OAuth provider: a tool registers on each one with POST /api/v1/apps. Tokens don't expire until you revoke them.
PostingPOST /api/v1/statuses with write:statuses, media first through /api/v2/media: up to 4 attachments, or one video. An Idempotency-Key stops a retry from posting twice.
Limits500 characters on default servers, more on many. 300 posts per 3 hours per account, and scheduled posts at least 5 minutes ahead, 25 a day.
Server rulesEach server writes its own. mastodon.social asks for generative AI use to be disclosed and doesn't allow accounts that only post AI-generated content.

What Breakreach's Mastodon tools doAnd what they don't, yet.

What you can ask for

Text postsPublic posts on any Mastodon server, within its character limit, 500 on most.
Photos or a videoUp to 4 photos, or one video, which Mastodon processes before it goes out.
SchedulingAt a time you give, or the next free slot of your posting schedule. Breakreach holds the post, so Mastodon's 25-a-day cap on scheduled posts doesn't apply.
StatsLikes, replies and boosts per post, plus followers and post count. Mastodon doesn't count views.

Not yet, or not possible

Content warnings, alt text and polls
Unlisted, followers-only or private posts
Threads and quote posts
Reading timelines, notifications or mentions

Set it up in Claude.7 steps, once. ChatGPT works the same way.

Claude· Customize › Connectors
Connectors
Search
Breakreach
Schedule and publish to 15 social networks
Connect
Connectors let Claude use outside tools for you. You can disconnect them at any time.

Claude· Customize › Connectors

Connectors

Breakreach

Schedule and publish to 15 social networks

Connect

Connectors let Claude use outside tools for you. You can disconnect them at any time.

In Claude Code, Cursor or any MCP clientOne hosted server, OAuth or an API key.

The server lives at https://api.breakreach.com/mcp and speaks Streamable HTTP, so there is nothing to install. Clients that handle OAuth sign you in; others send an API key from Settings → API & MCP.

Claude Code (then run /mcp to sign in)

claude mcp add --transport http breakreach https://api.breakreach.com/mcp

Cursor (~/.cursor/mcp.json)

{
  "mcpServers": {
    "breakreach": {
      "url": "https://api.breakreach.com/mcp",
      "headers": { "Authorization": "Bearer br_YOUR_API_KEY" }
    }
  }
}

Step-by-step setup for each client: Claude Code, Cursor, Codex and OpenClaw.

What to askThree requests that work on Mastodon today.

“Post to Mastodon that Morning Light is out, with the pour-over and latte photos”
“Write this for Mastodon under 450 characters with two hashtags, and schedule it for 9 AM”
“How many boosts did my last five Mastodon posts get?”

FAQ

Questions, answered.

Short answers about Mastodon MCP servers.

No. A request for MCP support was closed as not planned in April 2026, with a maintainer writing that the project isn't interested in facilitating LLM use. Every Mastodon MCP server is third-party.

Breakreach does: it registers on your server the first time someone from it connects. Open-source servers work on any server too, with a token or OAuth from there.

Each server sets its own. mastodon.social asks you to disclose generative AI use and doesn't allow accounts that only post AI-generated content, so read your server's rules before automating.

Not with Breakreach, which only asks to read your account and write posts and media. Open-source servers like activitypub-mcp read notifications on your machine.

In Claude: Customize → Connectors → Discover, search Breakreach, Connect. In ChatGPT: Settings → Plugins, search Breakreach, Connect. In Claude Code: claude mcp add --transport http breakreach https://api.breakreach.com/mcp, then /mcp to sign in. Then connect Mastodon in Breakreach: type your server and approve there.

Creating a Breakreach account and connecting your first social account is free. Scheduling and publishing need a plan, from $29 a month ($23 billed yearly) for 5 accounts.