Too Cheap!

Vanilla anvils refuse a combination when the cost reaches 40 levels and show the Too Expensive message. The mod swaps that fixed value for 2147483647, the largest value a Java integer can hold, so the limit effectively disappears. By default the cost of each anvil use and its scaling stay as they are in vanilla, and the change only takes effect once the player opts into the new settings.

The mod lets a player or server owner choose the highest cost an anvil accepts, how often an anvil takes damage, an optional cost cap and how fast costs rise with each use. A set of experimental options adjusts some internal values the author identified, though their exact effects are not confirmed. Settings are edited in the config file, or through a GUI when Mod Menu is installed as an optional dependency.

Too Cheap! is open source under the MIT License and requires Cloth Config API on Fabric and Quilt. It is published for 1.17 – 26.3, and the server needs it while players may skip it, so it works with a client that lacks the mod.