ModsFinder

Custom Server Data

by Hdi

Custom Server Data is a Fabric and Quilt library for server owners and mod developers who need persistent global data on the server.

FabricQuiltServer-side onlyAll rights reserved1.20.6

What it does

The library lets a server mod store structured data that survives restarts. Each value is declared in a schema with a type, a default, constraints and nullability, and is read and written at runtime through a static API. Each value is written to human-readable JSON files in the world save folder. The mod runs on the server only, so players join without installing it. Files are published for Fabric and Quilt, both for 1.20.6, and the latest build is 1.0.3 from 2026-04-06.

Key features

  1. Schema-defined values

    Each stored variable has a declared type, default value, constraints and nullability, checked by the schema system.

  2. Custom object storage

    Developers store their own objects by implementing IJsonSerializable, so the data can take any structure they need.

  3. Readable JSON storage

    Data lands in human-readable JSON files in the world save directory, so it can be inspected and edited by hand.

Compatibility

Latest build for each game version and loader.

1.20.61.0.31.0.3
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Required by 4 mods

Essentials Utils Commands1.20.6Player Statistics Utils1.20.6Ultimate NPC1.20.6Block Farming1.20.6

How it compares

Full comparison

Static Data is also a server-side library for Fabric and Quilt and is open source under the MIT License, with files for 1.20 – 1.21.5. NBT Recipes is open source under the Apache License 2.0, but it is server-side only for 1.20 – 1.20.1 and does not store general data. Custom Server Data is not open source and is licensed as All rights reserved.

ModLoadersGame versionsEnvironmentUpdated
Custom Server DataFabric and Quilt1.20.6Server-side only2026-04-06
Static DataFabric and Quilt1.20 – 1.21.5Server-side only2025-04-06
NBT RecipesFabric and Quilt1.20 – 1.20.1Server-side only2023-11-14

Questions

Does Custom Server Data need to be installed on clients?

No. It runs on the server alone, so players need nothing extra to join.

In the catalog

Custom Server Data is one of 4,058 Storage mods on ModsFinder, and one of 2,474 Storage mods for Fabric. 11,154 mods support Minecraft 1.20.6.

Storage mods4,058Fabric modsMods for 1.20.611,154

More from Hdi

All projects
Custom Player Data1.20.6Star Wars Original Trilogy1.20.6Custom Item Data1.20.6The Flash CW Season 1 Core1.20.6Essentials Utils Commands1.20.6Player Statistics Utils1.20.6

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What the author says

Custom Server Data is a Fabric server-side library mod that provides a structured, persistent global data framework for Minecraft 1.20.6. It allows mod developers (and the server itself) to store data. Each variable is defined with a type, default value, constraints, and nullability through a schema system, then…
Hdi, on the Modrinth page

Official listing

Owner
Hdi
Published
2026-04-06
Updated on Modrinth
2026-04-06
Facts verified
2026-10-15

Tags

LibraryStorageUtility
Open on ModrinthCompare