SLC - SimpleLandClaim

Players claim land by right-clicking two corners with a golden shovel, which marks a rectangle that can be carved to fit the claim shape. Within a claim, the owner alone may break or place blocks, open chests, or touch item frames, whereas guests keep access to doors, gates, trapdoors, and pressure plates and can move through the land freely. Shops stay open to other players, so a claim can host a storefront without opening the rest of the land.

Claimed blocks survive explosions from TNT, creepers, ghasts and end crystals, and the claim also protects against fire, pistons and fluids. Admins can mark zones where players are allowed to claim, using a golden hoe command, and can cap claim size, a single claim total and the number of claims per player. Owners can give friends full build access to a claim.

The mod is server required with the client optional: server owners install it on Fabric, and server-side vanilla clients are supported, so players can join without installing anything. It also works in single-player. Fabric API is required and must be installed next to it. SLC - SimpleLandClaim is published for Fabric only, for 26.2, and is released under All rights reserved; it is not open source, though public links to the source code, issue tracker and wiki exist.