Yes, INDENTED is a Scrabble word!

Letter values in Scrabble US: I 1, N 1, D 2, E 1, N 1, T 1, E 1, D 2.

Is it a valid word?

INDENTED is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

set in from the margin
cut or tear along an irregular line so that the parts can later be matched for authentication
make a depression into
notch the edge of or make jagged
bind by or as if by indentures, as of an apprentice or servant