It's not really... only if you consider it a gender. There's a difference between saying "I'm agender" and "my gender is agender". The latter doesn't make sense, but the first one is totally fine.
DOES ANYONE ELSE THINK THE TERM AGENDER IS SORT OF PARADOXICAL? SAME WITH PEOPLE WHO ARE PANGENDER AND AGENDER, I’M NOT TRYING TO SAY IT’S INVALID AS I’M PANGENDER AND AGENDER (NO, AGENDER IS NOT ALWAYS INCLUDED IN PANGENDER), I JUST THINK THE DEFINITION OF AGENDER SORT OF CONFLICTS WITH ITSELF