country_id or league_id; is_cup distinguishes regular leagues from cups/international competitions (such as the World Cup).
league_id is a required filter parameter for most downstream endpoints (fixtures, standings, top scorers, season list, etc.). When integrating, you’ll typically call this endpoint first (or combine it with 01 Country List) to obtain the league_id of the target league, then use it to query Season List for that league’s available season values. The data is largely static and can be cached locally.
Endpoint
Parameters
Response fields (data: array)
Request example
Response example
HTTP 200,