All US profile ladder endpoints return 503 error. Is this a temporary issue, as the code suggests, or something is wrong?
Example:
https://us.api.blizzard.com/sc2/profile/1/1/20782779/ladder/summary
This call returns 503 error, but their web profile Profile Summary - PartinG - StarCraft II Official Game Site correctly shows the ladder.
/sc2/profile/1/1/20782779/ladder/304452 (player’s last ladder) also returns 503 error code.
https://us.api.blizzard.com/data/sc2/season/49 returns 404
I’ve been experiencing this too!
Now some EU endpoints return 502 error code sometimes
Affected endpoints:
/data/sc2/league/:season/:queue/:type/:league
/sc2/legacy/profile/:regionId/:realmId/:profileId/matches
/sc2/legacy/ladder/:regionId/:ladderId
Matches and ladder errors are more frequent. It’s only relevant for eu.api.blizzard.com host, if any other host is used, like us.api.blizzard.com, then there are no errors.
This is incredibly frustrating, the SC2 API is still broken and there hasn’t been any acknowledgment of this 
The issues have been resolved.