Since it is an unofficial project utilizing Mojang’s assets, links and hosting sites are frequently taken down due to DMCA notices. Finding a stable, permanent "official" site can be a game of whack-a-mole. Verdict
This is the actual game server. You can download the final 1.16.5 builds from the PaperMC downloads archive EaglercraftXBungee: minecraft 116 eaglercraft