ModsFinder

Polydex2REI

by SAGUMEDREAM

Polydex2REI is a Fabric compatibility addon that lets Roughly Enough Items show recipes and lookups for virtual items registered through Polymer and Polydex.

FabricClient or server, optionalMIT LicenseOpen source1.21.7 – 1.21.11

What it does

Roughly Enough Items does not recognize server-side virtual items registered through Polymer, so their recipe pages and lookups can come up empty. Polydex2REI bridges that gap by attaching to Polymer REI and reading the recipes defined through the Polydex API, so those entries appear in REI. Clicking an item in the lookup list opens its recipe page as expected.

Virtual items used for custom UI buttons, recipe placeholders and guide entries are covered once the addon is present. The mod is open source under the MIT License. Its dependencies are Polydex, Polymer and Roughly Enough Items (REI).

Key features

  1. REI bridge for Polymer

    Connects Polymer REI with Roughly Enough Items so virtual items become visible to REI.

  2. Polydex recipe support

    Recipes registered through the Polydex API are read and shown in REI recipe pages.

  3. Synchronized lookups

    Item lookup actions and keypress-driven recipe views open the correct recipe page.

  4. Plug and play setup

    Adding the addon requires no extra configuration beyond installing it with its dependencies.

Compatibility

Latest build for each game version and loader.

1.21.111.0.3
1.21.101.0.2
1.21.81.0.2
1.21.71.0.2
ReleaseBetaAlphaNot available

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

Requirements

Dependencies declared by the latest file for each loader.

Required 3

PolydexTarget block/entity tooltip and recipes in one ui mod for servers!
Required
Roughly Enough Items (REI)Clean and Customizable. Alternative to Just Enough Items/JEI.
Required
PolymerLibrary for creating better server side content!
Required

Use cases

Modpack creators

Pack makers who register virtual items with Polymer can let players look up their recipes in REI.

Developers

Mod developers who define custom recipes through Polydex can expose them in REI without writing their own bridge.

Who it’s for: Modpack creators and developers who use Polymer to register virtual items and Polydex to define custom recipes, and players whose recipe viewer needs to show those items.

Questions

Which dependencies does Polydex2REI require?

Polydex, Polymer and Roughly Enough Items (REI) are required. All three must be installed for the addon to work.

Does Polydex2REI need to be installed on the server?

The addon works on either side, and neither needs it. Its author notes say both the client and the server should have it installed for the features to function properly.

Which game versions does Polydex2REI support?

Fabric files exist for 1.21.7, 1.21.8, 1.21.10 and 1.21.11. The latest file is 1.0.3 for 1.21.11, published on 2026-03-17.

More from SAGUMEDREAM

All projects
Gensokyo: Reverie of Lost Dreams1.21.4 – 26.1.2CoreExtensions1.20.1SUSuperAuth1.20 – 1.21.4FEFabric-Economy1.21 – 1.21.1PolyMc-Extra1.21.6 – 26.1.2Polydex2EIV1.21.4 – 1.21.10

What the author says

Bridging the Gap Between Polymer and REI — Let Your Recipes Be Seen Polydex2REI is a compatibility addon that connects Polymer and REI (Roughly Enough Items), enabling full support for virtual items and custom recipes defined by Polydex.
SAGUMEDREAM, on the Modrinth page

Official listing

Owner
SAGUMEDREAM
Published
2025-08-26
Updated on Modrinth
2026-03-17
Facts verified
2026-10-15
Open on ModrinthCompare