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Mastodon isn’t one website — it’s thousands of independent servers. Ocoya connects to whichever server hosts your account, so the first thing it asks for is the server, not your username.

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Connect Mastodon

1

Open Channels

Select Channels in the left sidebar, then Connect channel.
2

Choose Mastodon

Pick Mastodon from the Add a connection panel.
Add a connection modal with a category sidebar on the left — All, Social, Streaming, Community, Blogging, Ecommerce and Developers, each with a count — and a grid of channel cards, each with its logo, name and a one-line description

Mastodon in the Add a connection panel.

3

Enter your server

Type the domain of the server your account is on — mastodon.social, for example. Ocoya suggests the common ones: mastodon.social, mas.to, mastodon.world, mastodon.online and techhub.social. Any real Mastodon server works, not just those.
4

Authorize on your own server

Ocoya sends you to your server’s authorization page, where you approve access to read your account and publish posts and media. You sign in to your server, never to Ocoya.

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What you can post

A Mastodon post needs either text or media. Completely empty posts are refused.

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Mastodon’s limits

Your server can be stricter. Every Mastodon server sets its own character count and attachment limit, and Ocoya reads them from your server when publishing. Most use 500 characters, but a server configured for 1,000 gets 1,000 — and one that allows fewer attachments will say so: “This Mastodon server allows a maximum of N media attachments.”

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Long captions become threads

Above your server’s per-post limit, Ocoya splits the caption into a chain of replies rather than refusing it, up to 5,000 characters total. See Long posts and threads.

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Common problems

“Enter a valid Mastodon server domain, such as mastodon.social.” The domain was mistyped, or you entered your full handle instead of the server. Enter only the domain — mastodon.social, not @you@mastodon.social. “This Mastodon server cannot be connected.” The domain resolves but isn’t a reachable Mastodon server. Check it in a browser first; if your server is behind a login wall or private network, Ocoya can’t reach it. “My post was shorter than 500 characters and still split.” Your server’s limit is lower than Mastodon’s default. The warning in the editor uses 500; publishing uses your server’s real number.

Long posts and threads

When a caption is split into a chain of replies.

Character and media limits

Every network’s limits in one table.