Epsilon Outpost 8 was a Federation Epsilon Outpost. This outpost was located in the Beta Quadrant, on the Federation-Klingon border.
In 2256, this outpost's location was labeled on the star chart "Alpha/Beta Quadrant Overview" in the ready room aboard the USS Discovery. (DIS: "Magic to Make the Sanest Man Go Mad")
In 2257, during the first Federation-Klingon War, this outpost was occupied by the Klingons. (DIS: "The War Without, The War Within")
This outpost was only mentioned in writing.
The name of this outpost comes from the source material – the Star Trek: Star Charts (pp. 62-63) – used for the series' star charts. In the episodes, only the outpost's designation was mentioned.