> For the complete documentation index, see [llms.txt](https://mastodon.gitbook.io/mastodon/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mastodon.gitbook.io/mastodon/user/external.md).

# Using Mastodon externally

## Remote interactions on another Mastodon site

![An example of a post's public permalink on a Mastodon site.](/files/-LuOIwgporjsq3P6EEHb)

When you are browsing a remote site powered by Mastodon, clicking on any of the interaction buttons will load a dialog that will redirect you to your local site.

![A remote interaction dialog for replying to a toot.](/files/-LuOKye8MSwh-AGO_1ty)

## Signing into a client app

You can use your Mastodon account to sign into any app that implements the Mastodon API. A list of such apps can be found at <https://joinmastodon.org/apps>.