> ## Documentation Index
> Fetch the complete documentation index at: https://connect.trypost.it/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Mastodon

> Posts on any instance. Connect asks for the instance URL, then runs OAuth there.

Connect asks for the instance URL, then runs that instance's OAuth. How the browser flow works: [Connect accounts](/docs/guides/connect-accounts).

## Content type

`mastodon_post` — caption optional. Up to **4** images or video. GIFs are kept as GIF. No `meta` keys.

## Limits

| Image | Video |
| ----- | ----- |
| 10 MB | 40 MB |

JPEG / PNG / GIF / WebP. Video MP4 or MOV.