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Connect Claude, ChatGPT or any MCP client to Mastodon with the OmniSocials MCP server. Your agent posts threads and images with descriptions on any Mastodon server, and reads your likes and boosts.

Start Free TrialHow it works
Claude is planning your launch post…
Works withAll 21 agents
What it does

Ask in plain words. Your agent picks the MCP server's tools, within your server's limits.

  • Threads that fit your server.

    2 to 25 posts, each within your server's limit, sent as one chain of replies.

  • Posts that fit your server.

    Within your own server's character limit, where a link counts as 23.

  • A description on every image.

    Up to 4 images or one video per post, each described in up to 1,500 characters.

  • Know what worked.

    Your best post, its likes and boosts, and the best time to post the next one.

Setup

Connected in a minute. One URL and one sign-in. No API key for chat apps.

  1. Connect Mastodon in OmniSocials.

    Type your server's address and sign in there. No app to set up.

  2. Add the server to your agent.

    Paste one URL as a custom connector, or run one command.

  3. Sign in and pick a workspace.

    OAuth in the browser. Agents that run on their own use an API key.

Tools

The Mastodon tools. 19 tools for Mastodon, in 4 groups. Your agent picks them from a plain request.

omnisocialsConnected
https://mcp.omnisocials.com
19 for Mastodon
  • create_postSchedule a post or a thread, with a description on each image.
  • create_and_publish_postPost to Mastodon right away.
  • update_postChange the text, thread or time of a scheduled post.
  • upload_mediaUpload images or a video from a URL or the chat.
  • check_media_compatibilityCheck a file's size and format before it goes out.
  • retry_postPublish a failed post again.
  • get_post_analyticsThe numbers Mastodon reports for one post.
  • get_posts_analyticsThe numbers for many posts at once, to compare them.
  • get_account_analyticsYour followers, following and posts.
  • get_best_timesYour best days and hours from your own posts, or industry defaults until you have 15.
  • get_recent_platform_postsYour latest posts with their likes and boosts, also the ones made in Mastodon.
  • list_approval_workflowsThe review steps a post can go through.
  • approve_postApprove a post that waits for you.
  • reject_postSend a post back with what to change.
  • get_post_approvalWhere a post stands in its review.
  • list_accountsThe accounts connected to the workspace.
  • switch_workspaceWork in another workspace.
  • list_mediaFind an image in your library before uploading it again.
  • create_webhookGet an event when a post is scheduled, published, approved, rejected or fails.
Publishingcreate_postSchedule a post or a thread, with a description on each image.
Try askingPost the threads launch as a thread Thursday at 9 AM, with a description on the image.
Mastodon API

One request.Any Mastodon server.

Publish posts, polls and threads to any Mastodon server without registering an app on each one. OmniSocials reads every server’s limits for you.

Explore the Mastodon APIRead the docs

Real-time webhooks

Get an event the moment a Mastodon post is scheduled, published or fails. Signed payloads, sent straight to your endpoint.

Read More
POST /v1/posts/create
await client.posts.create({
  content: "Which SDK do you use first?",
  channels: ["mastodon"],
  scheduled_at: "2026-10-15T09:00:00Z",
  mastodon: { poll: {
    options: ["TypeScript", "Python", "Go"],
    expires_in: 86400, multiple: true,
  } },
});

Every format in one call

Posts, polls, images and video with descriptions, and threads of up to 25 parts through one request.

Read More

From your terminal

Claude Code, Codex or Gemini CLI schedules your Mastodon posts and threads through the OmniSocials MCP server and agent skill.

Read More
Platform integrationComing soon

Your customers' Mastodon accounts, inside your product

Soon your customers connect their own Mastodon accounts on one page with your logo, and you post and report for each of them.
See platform integration
Testimonials

Trusted by Agencies, Solo Founders, Developers & Small Businesses

Agency

Ansub Khan

Founder of Supafast

5 out of 5
“The MCP is the real game changer for me. It makes the whole workflow feel much faster and less messy.”
SaaS

Jens Schumacher

Co-founder of Released.so

5 out of 5
“I really like this app. I’ve tried quite a few other tools, but none of them managed to hit the sweet spot of simplicity and pricing the way Omnisocials does.”
Marketing agency

Niels Koelewijn

Founder of Frizzer

5 out of 5
“Very easy to use and very handy to schedule posts across platforms for my marketing agency.”
Solcardstory coming soon
G2CapterraTrustpilot

Learn more. Setup guides, Mastodon and the docs.

Frequently
Asked Questions

Robert Ligthart
Robert LigthartFounder of OmniSocials
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Robert Ligthart
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