Michetti is charged with knowingly entering a restricted building, violent entry and disorderly conduct on Capitol grounds. If found guilty, he faces up to 20 years in jail.
Some of his text messages were sent while standing on the steps of the Capitol, the FBI said.
“It’s going down here. We stormed the building they held us back with spray and teargas and paintballs,” he wrote at 2:06pm local time, shortly after Trump urged his supporters to march to march to the legislature.
He was later identified in other photos and footage from the scene, the Washington Post reported.
Michetti, from Ridley Park, Pennsylvania, appeared in court via video link and will do so again on Monday.