MCseedFinder

Spec sheet

Purpose

MCSeed Finder is a command-line seed filter for Minecraft Java Edition 26.2 that searches for worlds matching biome, structure, and structure-piece conditions.Read 8 Oct 2026 · github.com

Intended users

The project is for Minecraft Java Edition users who want to find seeds matching specific world-generation conditions.Read 8 Oct 2026 · github.com

License

The repository identifies its license as MIT.Read 8 Oct 2026 · github.com

Accuracy limits

The README notes that rare spawn landing blocks may differ slightly from the game because the tool does not generate complete block chunks.Read 8 Oct 2026 · github.com

Build requirements

Building requires the Rust toolchain and a C compiler that supports C11.Read 8 Oct 2026 · github.com

Configuration and output

The CLI accepts JSON search configurations and can emit JSONL output for other programs to process.Read 8 Oct 2026 · github.com

Game files

The repository says its build, runtime, and tests do not read Minecraft JARs or game installation files, and it does not download game files during build or runtime.Read 8 Oct 2026 · github.com

GPU acceleration

On Linux x86_64, users can build CUDA or ROCm/HIP variants; the default build does not require a GPU SDK.Read 8 Oct 2026 · github.com

GPU behavior

GPU screening is conservative and the CPU path performs final checks of biome, terrain, structure layout, and other world conditions.Read 8 Oct 2026 · github.com

Local operation

The world-generation implementation is included in the repository, and build, run, and test do not read Minecraft JARs or game installation files.Read 8 Oct 2026 · github.com

Parallel search

Search defaults to using all logical CPUs reported by the system, and users can set the thread count.Read 8 Oct 2026 · github.com

Partial piece searches

Pillager outposts currently expose only watchtowers and bastion remnants expose four implemented required pieces; several other structures support parent-structure searches only.Read 8 Oct 2026 · github.com

Performance

Search uses all available logical CPU cores by default and can optionally use CUDA or ROCm/HIP GPU acceleration on Linux x86_64.Read 8 Oct 2026 · github.com

Random search

Random mode traverses the signed 64-bit seed space in a pseudorandom permutation without repeating seeds.Read 8 Oct 2026 · github.com

Search features

Conditions can include spawn and nearby biomes, structures, structure pieces, and the number of eyes initially present in the nearest stronghold portal frame.Read 8 Oct 2026 · github.com

Search filters

It can filter seeds by spawn biome, nearby biomes and structures, and specific structure pieces.Read 8 Oct 2026 · github.com

Search modes

It supports sequential searches over a seed range and randomized searches across the 64-bit seed space.Read 8 Oct 2026 · github.com

Structure-piece limits

Some structures have partial piece coverage, while mineshafts, mansions, ocean monuments, ocean ruins, ancient cities, trail ruins, trial chambers, and nether fossils support parent-structure searches only.Read 8 Oct 2026 · github.com

Suggested verification

The README recommends confirming found seeds in Minecraft 26.2 before long-term use.Read 8 Oct 2026 · github.com

World compatibility

Searches cover the default world type and do not support large biomes, data-pack-modified world generation, or custom dimensions.Read 8 Oct 2026 · github.com

World limits

Searches cover the default world type and do not support large biomes, datapack-modified world generation, or custom dimensions.Read 8 Oct 2026 · github.com

Where Specifiction places it

• Minecraft Seed Finders#26 of 357.1