OAuth Channels

Mastodon

Community-first posting, with content warnings done properly.

Mastodon is a federated network of independent servers. Etiquette carries more weight here than reach mechanics: use alt text, use content warnings, and do not treat it as a broadcast channel.

Connect Mastodon

Mastodon has no central login. Type your username or your server (for example fosstodon.org); your server registers Sosial itself, so there are no app keys to create.

  1. Open Channels and select Mastodon.
  2. Enter your username or server, then select Connect Mastodon.
  3. Sign in on your server's page and approve.

Limits

LimitValue
Post limit500 characters on most servers
MediaUp to 4 images or 1 video
CultureContent warnings and alt text are expected
ReachHashtags genuinely help discovery here

The composer checks these as you type, so a post that's too long for Mastodon is flagged before it's scheduled.

What works on Mastodon

  • Technical communities
  • Open-source and research updates
  • Longer-form discussion

Tips

Use content warnings for sensitive topics

A content warning is a courtesy, not a downgrade. It keeps your post welcome in more timelines.

Use two or three real hashtags

Unlike most networks, well-chosen hashtags materially improve discovery on Mastodon.

Engage with replies properly

Boosts and replies matter more than follower count. A conversational account grows fastest.

Avoid

  • Assuming one server speaks for the whole network.
  • Auto-cross-posting identical marketing copy from X.
  • Posting images without alt text.

More on connecting accounts and scheduling posts.

Last updated: Oct 28, 2026, 1:52 PM UTC