Compatibility
Minecraft: Java Edition
b1.7.3
Platforms
Supported environments
Client and server
Links
Tags
Creators
Details
Licensed MIT
Published yesterday
RetroAPI
RetroAPI is a content-registration library for Minecraft Beta 1.7.3 that lets mods add blocks, items, recipes, entities, dimensions and more without requiring StationAPI. It runs on Ornithe (Fabric Loader + OSL) and Babric, and transparently delegates to StationAPI when that mod is also installed.
Developer Portal
To start developing for b1.7.3 with it go here!
https://matthewperiut.github.io/retroapi/index.html
What it implements
Registration
- Custom blocks and items with automatic, stable ID assignment - block IDs are expanded well past the vanilla 256 cap, and assignments persist across loads.
- Block entities without subclassing
BlockWithBlockEntity(RetroBlockEntityType). - Inventory / menu GUIs (chest, furnace and dispenser styles) with automatic slot sync (
@SyncField). - Crafting, smelting and furnace-fuel recipes (
RetroRecipes). - Custom entities with renderers, and custom dimensions reached through walk-in portal blocks.
- Achievements and achievement pages.
- Sound autoloading and automatic lang / translation generation.
Rendering
- Expanded texture atlas plus custom block and item renderers and render types.
Vanilla-safe world storage (sidecar system)
- All modded content is written to
retroapi/sidecar files keyed by string identifiers, so a world can be opened in vanilla without crashing or losing data and reopened in RetroAPI intact. - Covers extended block IDs, modded block entities, modded items inside vanilla containers, and dropped item entities.
Multiplayer
- OSL-based networking with server-to-client ID mapping sync and extended-block chunk sync.
StationAPI compatibility (optional, bundled)
- Ships a
retroapi-stationapicompanion that loads only when StationAPI is also present and delegates registration, rendering, dimensions and world conversion to StationAPI. With it, RetroAPI worlds round-trip through StationAPI's flattened world format without data loss.
Both jars include the StationAPI compatibility layer; it activates automatically if StationAPI is installed and stays dormant otherwise.


