Does Avengers: Endgame have a post-credit scene?

No — Avengers: Endgame has no post-credits scene, and it remains the only Marvel Studios film to end without one. Nothing interrupts the crawl and nothing is filmed after the last card.

The credits are worth sitting through anyway, and they are long: the story proper ends at 2:48:56 of a 3:00:57 runtime, so you are looking at roughly twelve minutes of scroll. The opening stretch is where the farewell actually lives. Each of the original six Avengers gets a solo title card built by the design studio Perception — the actor front and centre, eleven years of their own footage projected across them, and their real handwritten signature drawn on screen as Alan Silvestri's theme swells. It is the only time the MCU has treated its cast like a curtain call, and walking out when the lights come up costs you the most emotionally loaded three minutes in the back half of the film.

Then, once every last name has cleared, one sound. A hammer striking metal in the dark, a handful of blows, then silence. Disney confirmed it as Tony Stark beating out the Mark I faceplate in a cave in 2008 — audio lifted from Iron Man and stripped of Ramin Djawadi's underscore so that nothing is left but the metalwork. The saga closes on the noise that opened it.

What it sets up is deliberately nothing. Marvel had spent eleven years using the stinger as a delivery system — Fury in Tony's living room, the shawarma, Thanos smirking in the dark — and Endgame withholds it because a tease would have undercut a funeral. The next move was handled elsewhere: Spider-Man: Far From Home arrived roughly two months later and carried the two credits scenes this film refused, including the one that actually reset the status quo. So you can leave when the hammering stops. Just don't leave before the signatures.