https://mirrors.dotsrc.org/devuan/merged

as repository URL for that server.

Replace http with https and replace "deb.devuan.org" with "mirrors.dotsrc.org/devuan".

I don't usually look at the output you posted, so I can't sort out what you did wrong in sources.list. But I'll go ahead and guess - did you forget the /merged?

I'm attempting to use https with apt

Why ?

If you do wish to use HTTPS, you should instead directly use one of the mirrors that supports HTTPS.  https://pkgmaster.devuan.org/mirror_list.txt lists all the mirrors, what protocols they support, and where they are located.  So you can pick a nearby mirror.

I'm attempting to use https with apt and I've been experiencing fails.

I chose "https://mirrors.dotsrc.org" as the mirror I want to 'apt update' and 'apt install' with.
When I add the url to the /etc/apt/sources.list file it is confusing in how to get it to work.
Can you provide an example with my chosen mirror?

I have tried the following url structures with no success:

22 deb https://mirrors.dotsrc.org/devuan/dists/excalibur/InRelease
23 deb https://mirrors.dotsrc.org/devuan/dists/excalibur/main/binary-amd64/Packages
24 deb https://mirrors.dotsrc.org/devuan/dists/excalibur/non-free/binary-amd64/Packages
25 deb https://mirrors.dotsrc.org/devuan/dists/excalibur-updates/InRelease
26 deb https://mirrors.dotsrc.org/devuan/dists/excalibur-updates/ main
27 deb https://mirrors.dotsrc.org/devuan/dists/excalibur-updates/ non-free
28 deb https://mirrors.dotsrc.org/devuan/dists/excalibur-security/InRelease
29 deb https://mirrors.dotsrc.org/devuan/dists/excalibur-security/ main
30 deb https://mirrors.dotsrc.org/devuan/dists/excalibur-security/ non-free
31 deb https://mirrors.dotsrc.org/devuan/dists/excalibur-backports/Inrelease
32 deb https://mirrors.dotsrc.org/devuan/dists/excalibur-backports/ main
33 deb https://mirrors.dotsrc.org/devuan/dists/excalibur-backports/ non-free

force_https

If you do wish to use HTTPS, you should instead directly use one of the mirrors that supports HTTPS.  https://pkgmaster.devuan.org/mirror_list.txt lists all the mirrors, what protocols they support, and where they are located.  So you can pick a nearby mirror.

Previously it had been suggested that people use country codes for packages, for example us.deb.devuan.org for users in USA.  That is now no longer the case, country codes are no longer likely to work.

apt-panopticon is a script that regularly checks the health of the entire Devuan mirror system.  The results of that script are currently available on two servers.  https://borta.devuan.dev/apt-panopticon … t-web.html which checks the mirrors once an hour, though it is currently having timeout problems which are being investigated.  https://sledjhamr.org/apt-panopticon/re … t-web.html which checks every ten minutes.

With large parts of the world working from home as part of COVID-19 lockdowns, the Internet is being used more than is usual.  So there tends to be more random network issues.  Any particular network issue might be at your end, at the other end, or somewhere in between.  As mentioned above, even our own infrastructure is having some minor issues every now and then.

Please have patience, and stay healthy.