The First Fic On Archive Of Our Own

 The exact first fanfic on Archive of Our Own (AO3), created by the Organization for Transformative Works (OTW) in 2008, isn't definitively known publicly, but lore points to early posts being Wincest  fanfics from Supernatural, with one popular theory suggesting a story like "all you had to do was ask" by watersword might have been among the very first uploaded when the site was in its initial private testing phase, before its open beta launch in 2009

https://archiveofourown.org/works//2 (This Was The First Fic On AO3)