404 error on some Skeb commission pages

The URLs for each Skeb commission are numbered. The first ends in "/1", the second ends in "/2", etc. So those numbers will go up as high as the number of commissions completed. However, some of them lead to 404 errors.

Example:

https://skeb.jp/@tsuruse852/works/1
Can view the images in my browser without logging in. These commissions are mostly SFW.

https://skeb.jp/@tsuruse852/works/2
Logging in is required to view the images, but I can still upload them through Danbooru's upload page with the URL. These commissions tend to be more NSFW.

https://skeb.jp/@tsuruse852/works/5
404 error. No images detected through Danbooru's upload page.

https://skeb.jp/@tsuruse852/works/6
Same as the first. Images can be viewed without logging in. Notice that the number continues from the fifth commission instead of being listed as the fifth.

Is it possible to access these commissions? Is the URL formatted differently for those? Or is this due to the artist not posting them publicly and thus not getting their own pages, but the numbers are skipped anyway?

Disclaimer: I do not have a Twitter account or a Skeb account, so I did not attempt to log in to either site.

The third commission link is private or was deleted.

You have to login to view NSFW commissions on the site, but it seems like the uploader can pick them up regardless.

Of interest to note as I recently encountered this - Skeb also has a hidden filter for loli works, using some unknown calculation, but I think it blocks them for the majority of people outside of japan. It sets a hidden property "ndp" on your account, which setting to 8 should make all the works viewable.

Tampermonkey fix to that here: https://gist.githubusercontent.com/Moebytes/56730a09f47b24fd8ea593fc74ab0081/raw/db333cb10167a40ee65790bc8945d01beb76bde8/skeb-unblocker.js

Moebits said:
The third commission link is private or was deleted.

You have to login to view NSFW commissions on the site, but it seems like the uploader can pick them up regardless.

Yes, that's what I said about the second URL I listed. I've been going through the numbers one by one to access the NSFW images from that artist (it's actually kinda fun not knowing what I'll get). You can still view the commission pages without going through the main page that way, though the images and a lot of the information won't be accessible.

What I was wondering was whether the URLs giving the 404 errors would "work" in a similar way if you were logged in. That is, whether or not the images were visible, you would still be brought to an actual page (like "this post was made private" or something) instead of the site acting like it never existed.

I've had similar issues with Twitter when I'd click a source link and I'd get the "Hmm... this page doesn't exist" message despite still being able to do things like fetch artist commentary from it. That's why I thought something similar might've been going on with Skeb. But if the pages really are completely wiped, then I guess there's nothing we can do.

Of interest to note as I recently encountered this - Skeb also has a hidden filter for loli works, using some unknown calculation, but I think it blocks them for the majority of people outside of japan. It sets a hidden property "ndp" on your account, which setting to 8 should make all the works viewable.

Fortunately, this isn't likely to be an issue with this specific artist as most of the characters he draws are at least in their late teens. But still good to know regardless.

Fortunately, this isn't likely to be an issue with this specific artist as most of the characters he draws are at least in their late teens. But still good to know regardless.

I wouldn't be so sure, for instance this work is blocked without my fix: https://skeb.jp/@tsuruse852/works/27

Honestly, I thought it was a loli filter, but it seems to be calculated with a bad AI, because a lot of random NSFW are also being blocked along with it.

If you actually make an account you can verify that those commissions with 404 error are indeed private by going to his profile page (the fifth one shows a big "Private" thumbnail): https://skeb.jp/@tsuruse852

Moebits said:

I wouldn't be so sure, for instance this work is blocked without my fix: https://skeb.jp/@tsuruse852/works/27

Honestly, I thought it was a loli filter, but it seems to be calculated with a bad AI, because a lot of random NSFW are also being blocked along with it.

Then at the very least, the filter doesn't affect Danbooru's uploader because I already posted that work a while ago (post #10185138). It is the most explicit work I've seen to date from that artist, though.

If you actually make an account you can verify that those commissions with 404 error are indeed private by going to his profile page (the fifth one shows a big "Private" thumbnail): https://skeb.jp/@tsuruse852

I'm trying to do as much as I can without resorting to getting a Twitter account (which I'd need before I can sign in to Skeb if I understand correctly). So those "Private" thumbnails don't link to anything? Or the URLs are still the same as what I posted?

I read that since April 2024, Skeb has been cracking down on certain content and privating requests that have it or break some rule, and that they would need to be the ones to private it because if the artist privates it themself, it would affect their completion rate (it's still at 100%).

Blank_User said:

Then at the very least, the filter doesn't affect Danbooru's uploader because I already posted that work a while ago (post #10185138). It is the most explicit work I've seen to date from that artist, though.

Correct. To answer why this is the case, Skeb's filter is only applied on your client-side browser, the API results from their server still return the full details of the works. You don't need authentication to view the works from their direct link, either.

Blank_User said:

So those "Private" thumbnails don't link to anything? Or the URLs are still the same as what I posted?

Trying to access the links of those private works results in that 404 error. It might be somewhat confusing, as 404 is usually used to mean "this URL doesn't exist", yet Skeb returns 404 for pretty much anything, including links you are not allowed to access due to not having permission.

If you are adamant on not making an account, I guess what you are already doing will work fine - just assume that all the links not able to be recovered by the uploader are either private or don't exist

Moebits said:

Trying to access the links of those private works results in that 404 error. It might be somewhat confusing, as 404 is usually used to mean "this URL doesn't exist", yet Skeb returns 404 for pretty much anything, including links you are not allowed to access due to not having permission.

If you are adamant on not making an account, I guess what you are already doing will work fine - just assume that all the links not able to be recovered by the uploader are either private or don't exist

If the URLs are the same and give the same error, then the only advantage I would get from making an account would be the ability to see the restricted non-private works before uploading them. I may consider signing up if there's an artist with a lot of requests I think is worth it (or if I'm forced to use Twitter's features instead of third-party sites), but this one is relatively small and as long as I go in order, it should be easy to keep track.

Anyway, thanks for the help. I learned a lot from all this.

https://skeb.jp/@d_chrml/works/8
https://skeb.jp/@karoti_/works/4

I've recently started getting the fake 404 page for works that are obviously still there and not private, I can even see them flicker for a fraction of a second before it switches to the 404 page. The unblocker doesn't seem to work. Any advice? I've tried everything except just deleting my account and trying a new one (maybe registering with a VPN?)