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.
Connect Mastodon
Open Channels
Select Channels in the left sidebar, then Connect channel.
Choose Mastodon
Pick Mastodon from the Add a connection panel.
Mastodon in the Add a connection panel.
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.
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.
What you can post
| Post type | Supported |
|---|---|
| Text post | Yes — no image needed |
| Single image | Yes |
| Carousel | Yes — up to 4 images |
| Video | Yes — one per post |
| GIF | Yes — one per post |
A Mastodon post needs either text or media. Completely empty posts are refused.
Mastodon’s limits
| Limit | |
|---|---|
| Post text | 500 characters per post, 5,000 total |
| Hashtags | No fixed limit |
| Images per post | 4, maximum 16 MB each |
| Video per post | 1, maximum 99 MB |
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.”
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.
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.