Parking costs € 1.40 per hour on the NDSM terrain (See map). You can pay at the parking meter with debit card or via apps like Yellowbrick / Parkline (parking codes 19586/19587). On the NDSM site, paid parking applies from Monday through Sunday from 9 am to 7 pm. (Sundays from noon). You can buy a parkingcard online for 1 day/evening, 1 week or 1 month.
More information on the site of the city of Amsterdam (in Dutch): Parking rates Amsterdam.