SCP-005 | The Skeleton Key

SCP-005 is an anomalous key that opens locks. Right-clicking a door, trapdoor or fence gate with it opens that block. Doors cannot be closed again with the key, so it fits a story-driven SCP Foundation setting. Redstone power can also open doors, trapdoors and fence gates tagged as doors, trapdoors and fence gates, so the key works alongside existing mechanisms.

The key is placed by holding Shift and right-clicking a block, and reading its document is a right-click. Its only source is a structure that generates in the Overworld surface biome at a rare density, roughly one structure per 3000 blocks, so players find it with the locate command. The key is found inside the SCP-005 Containment Chamber or Cell. Because it opens block properties rather than a fixed list, it is meant to work with door mods that follow the same criteria.

The mod is client and server, so the server and every player need it. It targets Forge for the single game version 1.20.1, with the latest file 1.0.1 for 1.20.1 published on 2026-02-19. It was first published on 2026-02-07 and is all rights reserved, not open source.