In this respect it deserves attention that Clement of Alexandria regards the Apocalypse of Peter as Holy Scriptures (cf. Euseb. HE VI 14.1), which is proof of an origin at least in the first half of the 2nd century. The terminus a quo can be more precisely determined through the time of origin of 4 Est. (about 100 A.D.), which was probably used in the Apocalypse of Peter (cf. 4 Est. with c. 3), and 2 Peter, the priority of which was demonstrated by F. Spitta. We thus come, with H. Weinel, to approximately the year 135 as the probable time of origin,
regarding the Apocalypse of Peter which is fresh in my memory
I can’t find a copy of the manuscript though…(yet)…just source material
One of the links…appears copy and pasted on the earlychristian website