Euronext Brussels (BEL 20) API
Live Belgian equity data from Euronext Brussels: real-time quotes for any listed stock by ticker (price, % change, intraday OHLC, volume, market cap in EUR), a ranking screener for gainers, losers, most-active and top market-cap local primary listings, and the Brussels BEL 20 index. Foreign depositary receipts are filtered out so you get only genuine Belgian companies such as Anheuser-Busch InBev, KBC Group, UCB, argenx and Elia Group.
api.oanor.com/belgium-stock-api