Steam app id, the number in the store URL, e.g. `570` for Dota 2. A store app URL is also accepted.

News items per page, 1 to 100. Default: 20.

Only items published before this date or timestamp (UTC).

Only these feeds, comma-separated by feed name, e.g. `steam_community_announcements`. Each item's `feed.name` says which feed it came from.

Return each item's full contents. By default contents are cut at 500 characters.

Pass `page.nextCursor` from the previous response, with the same filters, to get the next page.