UPDATE: PTC is back online. (12:16 UTC)
just a short update for everyone using the Pokémon Trainer Club to log in (PTC). PTC is down at the moment without any ETA. PTC outage has been happening quite often recently, without any explanation from Niantic and the Pokémon Company.
The outage map indicates that PTC is down worldwide, with reports coming in from Australia, Europe, Japan, etc…
We’ve received a number of reports and rumors about the outage. Our sources are heavily rumoring that this PTC outage is connected with new Niantic’s anti-tracking and anti-botting measures.
Apparently, PTC accounts are being updated with new flags that should help Niantic track bot accounts more easily. As bots and third party apps almost exclusively use PTC accounts, it’s possible that PTC outages are connected to a database clean-up or an incoming bot ban wave.
We’ll update this article when the issue gets resolved.