List series

set_count, name or slug, with a leading - for descending. Every order ends on slug as the tiebreaker.

Accepted snake_case spelling of orderBy; the same sort keys and cursor rules apply.

Rows per page, 1 to 250. Card and sealed lists cost 1 credit per 50 rows requested, rounded up: 50 costs 1, 51 costs 2, 250 costs 5, so ask for multiples of 50. Above 250 you get LIMIT_EXCEEDED — follow links.next instead of raising it.

Opaque keyset cursor from links.next. Never construct one; it carries the sort order it was issued for and is rejected if orderBy changes mid-run.

Send back the ETag you stored. The API returns a strong ETag on every catalogue response, and a 304 is a header exchange: no body, no database row read.