This is incoming.debian.org, a service which provides access to uploads immediately after they are accepted into the archive. It is primarily for the use of the Debian buildd-network but is publically available.

Most Debian suites have an equivalent buildd-SUITE available under the debian-buildd directory. These can be used in the normal way via apt's sources.list. For example:
deb http://incoming.debian.org/debian-buildd buildd-unstable main contrib non-free

	Name	Last modified	Size
	HEADER.html	2014-08-16 21:35	598
	README.html	2017-03-19 10:28	50
	debian-buildd/	2016-05-18 10:41	-
	robots.txt	2014-08-16 20:50	26

Last updated: Sun Mar 19 10:28:05 UTC 2017