The friend who testified against the 1 World Trade Center jumpers was sentenced Thursday to 100 hours of community service.

Kyle Hartwell, 30, who served as lookout as his buddies leaped from the 1,776-foot-tall Freedom Tower, originally was charged with felony burglary and misdemeanor illegal BASE jumping.

But he cut a deal, agreeing to testify in Manhattan Supreme Court, to dodge the felony rap.

Last month, a jury found Jim Brady, Andrew Rossig and Marko Markovich not guilty of burglary, but convicted them of reckless endangerment and illegal jumping.

They’re expected to be sentenced in August.