byDennyys Mod
Installed on a Fabric client for 26.1.2, byDennyys Mod adds a secure cosmetic system with in-game shop access, cosmetic management and a Coins and Gems display.
What it does
Players can open the shop from inside the game with a button press, then purchase and manage cosmetics through the in-game interface. Cosmetic files are delivered in an encrypted .bdc format and decrypted on the client, which is meant to block unauthorized copies. The mod also scrapes assets and lets players load and verify cosmetics before they are used.
Identity checks rely on Mojang's own session verification endpoint, reached through the official session API during joinServer and hasJoined. The login token stays on the player's machine and is not passed to byDennyy. Only the player UUID, the username and a one-time session nonce go to byDennyy.de, and the mod does not function on servers outside that network. It works alongside Mojang Session Integration and is client-side only, so servers need nothing installed.
The mod is published by byDennyys Projects under the MIT License, which is not an open source license for this project's code. Builds cover 26.1.2 only, with the latest Fabric file, 1.0.3-26.1.2, dated 2026-08-03. Fabric Loader is required, along with the other dependencies the author lists.
Key features
In-game shop access
A shop button opens the cosmetics store without leaving the game.
Cosmetic management
Owned cosmetics can be purchased and managed directly through the in-game interface.
Encrypted cosmetic files
Cosmetics are stored in encrypted .bdc files and decrypted on the client before use.
Coins and Gems display
The current balance of Coins and Gems appears on the HUD while playing.
Verified identity
Identity is confirmed through Mojang's session verification before cosmetics load.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Cosmetics on byDennyy servers
Players on the byDennyy.de network can buy and wear cosmetics without leaving the game.
Who it’s for: Players who take part in the byDennyy.de network and want its cosmetic store inside the Minecraft client. Server owners outside that network have no use for it, since the mod does not work there.
How it compares
Cobblemon Shop Key is a Fabric client mod for 1.21.1 under All rights reserved, so it is not open source. Easy Shop Mod Improved runs on client and server for 1.21.11 under the MIT License and is not open source. SimplyCoins is open source under the MIT License, runs on client and server and covers Fabric and Forge for 1.16.5.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| byDennyys Mod | Fabric | 26.1.2 | Client-side only | 2026-08-03 |
| Cobblemon Shop Key | Fabric | 1.21.1 | Client-side only | 2025-06-15 |
| Easy Shop Mod Improved | Fabric | 1.21.11 | Client and server | 2026-08-21 |
| SimplyCoins | Fabric and Forge | 1.16.5 | Client and server | 2021-09-19 |
Questions
Does byDennyys Mod need to be installed on the server?
Which Minecraft version does byDennyys Mod support?
Does the mod send the login token to byDennyy?
In the catalog
byDennyys Mod is one of 36,990 Utility mods on ModsFinder, and one of 25,772 Utility mods for Fabric. 15,189 mods support Minecraft 26.1.2.
Similar mods
What the author says
The byDennyy Client is the exclusive companion mod for the byDennyy.de network. This mod enhances your gaming experience with a seamlessly integrated, secure cosmetic system and a modern in-game shop. Load and verify your cosmetics Verify your identity using the official Mojang session API (joinServer / hasJoined)…
Official listing
- Modrinth page
- modrinth.com/mod/bydennyys-mod
- Owner
- byDennyys Projects
- Published
- 2026-05-12
- Updated on Modrinth
- 2026-08-03
- Facts verified
- 2026-10-15