This is exactly what it sounds like. This blog automatically posts AO3
drarry fics, when it’s working correctly. It uses an IFTTT recipe
created by astolat, which you can find the instructions to here:
http://astolat.tumblr.com/post/30869975130/setting-up-ao3-feeds-on-tumblr
(I haven’t figured out how to link things in the description yet.)
Cheers!