There's always the show status: When a new season will be made (or expected to be) it says continuing, if not either cancelled or ended. I know Trakt works like that on their progress page, by displaying either "Check back next season" or "This show has ended" when there are no episodes next to watch.

Indeed, we do not have the data. It would be an easy addition, there could be 2 separate indicators, mid-season finale, and season finale. I've created a new ticket to think about this here.

Thanks for the feedback.

@travisbell Is there any update on this ticket? Thank you!

A season finale would be different than a series finale. The Trello ticket seems to be missing that distinction.

Currently the season details endpoint returns an episodes Array, and the last episode will have a prop of "episode_type": "finale", which is useful in determining that a season is over, but not that the series has actually ended. I've seen posts that say to use "in_production": false and "status": "Ended" on the series details endpoint, but that seems to be a false positive a lot of the time when it comes to Anime. For example when a series is not currently in production, and the season has ended, but the series hasn't been canceled and there's no information that the last season was a finale, there should be some sort of top-level prop that states finale: false or finale: true.

A current example of the above case would be for Physical: 100 (id: 210905). Your data reports that it's not in production and has ended, but it has a season 2 with no air date and no episodes. There's nothing online that states that it's over (that I could find), so I would expect your data to reflect "status": "Continuing".