Spoutcraft
by Spout
Spoutcraft is a client-side mod that lets a player join a Spout server and receive that server's modded blocks and items automatically.
What it does
When a player joins a server running Spout, the client receives the server's custom blocks, items and textures and adds them for the session. Those added pieces are removed again when the player leaves, so nothing stays behind in the client. Only the client needs the mod; players join without installing the content by hand, and servers run without it.
The mod works like a per-server modloader. Because it carries its own modded block and item types, the client stays light. Custom block shapes such as vertical slabs are supported, along with block properties like breaking speed, light level and textures. The server's text descriptions for blocks and items are the only data the client accepts, and server code is never transferred or executed on the client.
Spoutcraft is published for Fabric, NeoForge and Quilt. Files exist for 1.21.11, 26.1.2, 26.2 and 26.3, with 2.5 for 26.3 as the latest build on each loader. The code is not open source; a custom license applies, and public links exist for the source code and issue tracker.
Key features
Automatic content transfer
Modded blocks and items from the server are received and added in under a second after joining.
Custom block shapes
Non-vanilla shapes such as vertical slabs can be used, with breaking speed, light level and textures set per block.
Command auto-completion
Commands such as give offer auto-completion for the custom blocks and items a server provides.
Removal on leave
Custom content is removed the moment a player leaves the server, leaving the client unchanged.
Mod compatibility
Mods that add custom statistics, shulker box tooltips, minimaps and dynamic lights are reported to work with Spoutcraft.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Who it’s for: Players who join servers that run custom block content, and server owners who want to share modded blocks and items without requiring players to install them.
How it compares
Optometrist is server-side only and open source under the MIT License, covering Fabric, Forge, NeoForge and Quilt for 1.21.11 – 26.3. Vertical slabs is a Fabric-only mod for 1.20.5 – 26.3 that runs on client and server under the MIT License, so both sides need it. Spoutcraft is client-side only and not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Spoutcraft | Fabric, NeoForge and Quilt | 1.21.11 – 26.3 | Client-side only | 2026-10-02 |
| Optometrist | Fabric, Forge, NeoForge and Quilt | 1.21.11 – 26.3 | Server-side only | 2026-06-15 |
| Vertical slabs | Fabric | 1.20.5 – 26.3 | Client and server | 2026-09-16 |
Questions
Does a player need to install the server's blocks?
Which loader should a player choose?
Does the server need Spoutcraft installed?
In the catalog
Spoutcraft is one of 12,078 Decoration mods on ModsFinder, and one of 6,982 Decoration mods for Fabric. 8,071 mods support Minecraft 26.3.
Similar mods
What the author says
Spoutcraft works like a per-server modloader: the moment you join a Spout server, the server's modded content will be transferred and added client-side automatically. ✓ Supports all properties, including breaking speed, light level and textures
Official listing
- Modrinth page
- modrinth.com/mod/spout-client
- Owner
- Spout
- Published
- 2026-04-28
- Updated on Modrinth
- 2026-10-02
- Facts verified
- 2026-10-15