---
title: "Mastodon Scheduler: Posts and Threads"
description: "Schedule public Mastodon posts of up to 500 characters and threads with images, video and alt text. PostQueen waits for your server to process video first."
canonical_url: "https://postqueen.ai/channels/mastodon"
markdown_url: "https://postqueen.ai/channels/mastodon.md"
last_updated: "2026-09-25"
llms_txt: "https://postqueen.ai/llms.txt"
---

# Schedule Mastodon posts with your AI agent.

Mastodon scheduler

Schedule public Mastodon posts and threads with images, video and alt text; PostQueen waits for your server to process video before posting. Your AI agent can schedule them for you.

[Start 7-day trial for $0](https://app.postqueen.ai/auth?utm_source=postqueen.ai&utm_medium=landing&utm_campaign=trial&utm_content=channel-hero) [Limits and settings](https://postqueen.ai/channels/mastodon#limits) $0 due today. Cancel in one click.

What you can publish

## Post types on Mastodon.

- Supported Post Always public
- Supported Images and video With alt text; your server sets how many
- Supported Thread Each part replies to the one before, with an optional delay
- Not supported Unlisted, followers-only or direct Every post is public
- Not supported Content warnings and polls Not available
- Not supported Accounts on other servers One Mastodon server only

Limits at a glance

## Mastodon limits.

|  |  |  |
| --- | --- | --- |
| Post text | 500 characters | [Official docs](https://docs.joinmastodon.org/methods/instance/#v2) |
| Media per post | Usually 4 images or 1 video; your server decides | [Official docs](https://docs.joinmastodon.org/user/posting/) |
| Video | MP4, within your server’s video size limit | [Official docs](https://docs.joinmastodon.org/methods/instance/#v2) |
| Posting rate | 300 posts per 3 hours per account | [Official docs](https://github.com/mastodon/mastodon/blob/main/app/lib/rate_limiter.rb) |

From each network’s documentation and PostQueen’s own checks.

## How to connect

1. Open Add Channel and pick Mastodon.
2. Sign in to your Mastodon account on the login page that opens, and approve access.

## Settings in PostQueen

**Part delay**

Give each part of a thread its own delay after the part before.

From your agent

## Post to Mastodon by asking.

Ask Grok Bot, Muse, Claude, ChatGPT or any AI agent, and the post lands on your calendar.

- [![Grok Bot](https://postqueen.ai/assets/agents/grok-bot.png)](https://postqueen.ai/grok-bot)
- [![Muse](https://postqueen.ai/assets/agents/muse.svg)](https://postqueen.ai/muse)
- [![OpenClaw](https://postqueen.ai/assets/agents/openclaw.png)](https://postqueen.ai/openclaw)
- [![Hermes Agent](https://postqueen.ai/assets/agents/hermes-agent.png)](https://postqueen.ai/hermes-agent)
- [![Claude](https://postqueen.ai/assets/agents/claude.svg)](https://postqueen.ai/claude)
- [![ChatGPT](https://postqueen.ai/assets/agents/chatgpt.png)](https://postqueen.ai/chatgpt)
- [![Grok](https://postqueen.ai/assets/agents/grok.svg)](https://postqueen.ai/grok)
- [![Claude Code](https://postqueen.ai/assets/agents/claude-code.svg)](https://postqueen.ai/claude-code)
- [![Codex](https://postqueen.ai/assets/agents/codex.svg)](https://postqueen.ai/codex)
- [![Cursor](https://postqueen.ai/assets/agents/cursor.png)](https://postqueen.ai/cursor)
- [![Gemini CLI](https://postqueen.ai/assets/agents/gemini-cli.png)](https://postqueen.ai/gemini-cli)

[Post from your agent](https://postqueen.ai/mcp)

## Good to know

- PostQueen connects accounts on one Mastodon server, the one its login page opens. Other servers can’t connect.
- Every post goes out as public. Unlisted, followers-only and direct visibility are not available.
- PostQueen waits for your server to finish processing a video before the post goes out.

## Mastodon questions, answered.

Anything else? Write to [support@postqueen.ai](mailto:support@postqueen.ai) and a person answers.

### Can I connect an account on any Mastodon server?

No. PostQueen connects accounts on one Mastodon server, the one shown when the login page opens. Accounts on other servers can’t be connected.

### Can I choose who sees my Mastodon post?

Every post PostQueen publishes to Mastodon is public. Unlisted, followers-only and direct visibility, content warnings and polls are not available.

### Can I schedule Mastodon threads?

Yes. Add follow-up parts and they are published as a native reply chain, with an optional delay between parts. Each part can carry images or video with alt text.

### Can my AI agent post to Mastodon?

Yes. Once PostQueen is added to your AI agent through the MCP server or the CLI, it can schedule posts or threads, with image descriptions, to your connected Mastodon account.

### Could a post go out twice if something fails?

Not the post itself. PostQueen sends it with Mastodon’s protection against double posting, so a retry does not publish it twice. Replies in a thread are sent without that protection.

## Similar networks

- [Bluesky](https://postqueen.ai/channels/bluesky)
- [Threads](https://postqueen.ai/channels/threads)
- [Lemmy](https://postqueen.ai/channels/lemmy)
- [Nostr](https://postqueen.ai/channels/nostr)

[All 30+ networks](https://postqueen.ai/channels)

### Put Mastodon on autopilot, your way.

Schedule from the calendar or ask your agent. Every post lands on the calendar first.

[Start 7-day trial for $0](https://app.postqueen.ai/auth?utm_source=postqueen.ai&utm_medium=landing&utm_campaign=trial&utm_content=band-channel) $0 due today. Cancel in one click.