OPKONTOR
by CodeWizardTV
OPKONTOR is a Fabric economy mod for the OPSUCHT server, with a client-side trading network for buy requests, sell offers and anonymous haggling.
What it does
Players list what they want to sell or buy, and matching sellers or buyers come to them through the trading network. Offers are not made directly: buy requests can turn tables so the sellers come forward. Negotiations stay anonymous, and the names of both trading partners are revealed only after a successful deal is sealed.
The mod runs on the client alone, so only the player needs it. Its item database covers OPSUCHT custom items, and the mod is exclusive to that server. Files are published for Fabric and 1.21.11 only, with 0.4.2 as the latest build, released 2026-09-08. The code is not open source, and the mod is released under All rights reserved.
Key features
Sell search
Players can search for items that others want to buy and offer them for sale in the same network.
Anonymous haggling
Negotiations are anonymous, and a deal reveals the trading partner's name only after it is sealed.
Price input options
The price field can be left open for buyers to make offers, or filled with a guide price and shorthand such as 5k, 1.5m or 1.5k to save typing zeros.
Bulk trading and hotbar import
Quantity can be set to one item, a complete stack or an entire double chest, and items read from the active hotbar can be imported directly.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
Item Seller is an open source Fabric mod under the MIT License for 1.21.10, and it runs on the client alone, as OPKONTOR does. Snurbo's Shops is a Fabric mod for 1.21.1 under All rights reserved that needs the server and makes client installation optional, while Trading Stalls covers 1.21 – 1.21.11 and is open source under the GNU General Public License v3.0 only.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| OPKONTOR | Fabric | 1.21.11 | Client-side only | 2026-09-08 |
| Item Seller | Fabric | 1.21.10 | Client-side only | 2025-12-31 |
| Snurbo's Shops | Fabric | 1.21.1 | Server required, client optional | 2026-07-01 |
| Trading Stalls | Fabric | 1.21 – 1.21.11 | Client and server | 2026-09-08 |
Questions
Does OPKONTOR need to be installed on the server?
Which game version does OPKONTOR support?
Can the price be set in shorthand?
In the catalog
OPKONTOR is one of 2,072 Economy mods on ModsFinder, and one of 1,159 Economy mods for Fabric. 19,862 mods support Minecraft 1.21.11.
Similar mods
What the author says
OPKONTOR - Sell what others are looking for. The client-side item trading network – exclusively for OPSUCHT.net OPKONTOR revolutionizes item trading on OPSUCHT. Instead of selling your valuable items below value in chat or at the auction house, this purely client-side mod opens your personal, digital trading office.
Official listing
- Modrinth page
- modrinth.com/mod/opkontor
- Owner
- CodeWizardTV
- Published
- 2026-05-27
- Updated on Modrinth
- 2026-09-08
- Facts verified
- 2026-10-15