"GraphQL API is turned off temporarily" response

I am running some API requests and keep getting this response (error message):

"“GraphQL API is turned off temporarily”

I started noticing this at around 11:40 BST and it is persisting both in API calls and the API Playground now, 10 mins later.

Do we know what is going on and do others have the same issue?

Ok, this took a day to get posted and the API seems to be working again. Do we know what happened? Is there a post mortem?

Thanks!

Are you a marketplace developer?