The deal is non-guaranteed, a source told The Athletic's Jason Jones.
The No. 9 pick in the 2015 draft spent last season with the Phoenix Suns following four years with the Charlotte Hornets. Kaminsky's averaged 9.8 points and four rebounds in 321 NBA games but has some value as a floor-spacer.
The Kings reportedly also added center Hassan Whiteside on Wednesday on a veteran's minimum deal.