Post to Mastodon.
What Publishly actually supports for Mastodontoday — authentication, posting, analytics & how a failed post is reported. Nothing below is a roadmap item presented as shipped.
Platform facts last verified: 2026-08-10
Publishly connects to Mastodon using Official OAuth, can post to it today, and does not yet report analytics for it through Publishly. Any failed Mastodon post carries one of 20 documented failure codes, shared across every connected network.
| Capability | Mastodon |
|---|---|
| Authentication | Official OAuth |
| Posting via Publishly | Supported by Publishly |
| Analytics via Publishly | Not yet supported |
| Scheduling | Supported — schedule from the calendar or the public API, same as every other connected account. |
| Failure codes | Same shared catalog as every other network — the 20-code reference |
- Mastodon is federated — authorization runs through the OAuth server on the specific instance you connect.
- Mastodon does not report analytics through Publishly.
We don’t publish numbers we haven’t re-verified.
Media specs, character limits & rate limits vary by API version and change without much notice from the platform. Rather than print numbers here that go stale, Publishly points you at Mastodon’s own developer documentation — the detailed per-platform specs on this page are still being verified against the current API.
Mastodon developer documentation
Every post to Mastodon authenticates using Official OAuth — Publishly never asks for your platform password to post on your behalf.
See every platform Publishly supports.
Ten networks, one API, one shared failure catalog.