@basetwojesus Yes, there is. On instances.social you can sort known instances by uptime. There are some non-Mastodon instances (e.g. pixelfed.de) in the list, but most are Mastodon.
https://instances.social/list/advanced
For a current view, there's also a status monitor of some instances here:
https://mastodonstatus.com/
#MastodonStatus #MastodonUptime
Mastodon instances

Hallo Fediverse, weiรŸ jemand was mit dem Server #eduresearch.social los ist? Seit Freitag erscheint " #503 Service unavailable"๐Ÿ˜Ÿ #MastodonStatus #MastodonProblem

Hello Fediverse, does anyone know what happened to the server #eduresearch.social? Since Friday it says #503 Service unavailable ๐Ÿ˜Ÿ

I can't see anything in my home feed but #MastodonStatus says all is good. What's going on?
#mastodon #error
https://status.mastodon.online/
mastodon.online - Status

mastodon.online Status

I'm having troubles with images upload to mastodon.social instance. Is anyone experiencing the same thing?

POST /api/v2/media returns 503 response code

#Mastodon #MastodonSocial #MastodonStatus

Omg, mastodon.social is suffering. #MastodonSocial #MastodonStatus #Mastodon
@flyswatter #MastheadDotSocial has now progressed to 404 errors. On the one hand I guess that a change in errors must mean that somebody is still working on that #MastodonServer but it's infuriating that there is nowhere I can go, like a #MastodonStatus update page where people can find out what's going on with their #server on occasions like these #Mastodon - wouldn't that be a #NiceToHave ?