
Useful Spyglass
Viewing a mob or player with a spyglass displays some information on the screen. Also adds a unique enchantment for the spyglass.
Screenshots

About this Mod
Useful Spyglass
Features:
This mod allows players to view information on mobs when viewing them through a spyglass, such as name, health, armor, and hostility.
Enchantments:
As of 0.6.0, usage of any enchantment will put the spyglass on cooldown. No other spyglass enchantments can be used while the cooldown is active. Marking effects applied through enchantments are only visible to the user as of update 0.7.0.
- Marking: Pressing the attack keybind marks mobs viewed through a spyglass. Puts the spyglass on cooldown for 0.8x of the marking duration.
- Precision: Offhanding a spyglass and crouching while using a ranged weapon grants zoom. Projectiles gain perfect accuracy and deal extra damage. 4 second cooldown by default.
- Spotter: Pressing the attack keybind while looking through a spyglass summons an eye of ender to constantly mark entities near the targeted position. Requires line of sight and can detect invisible entities. Cooldown time is 1.4x the active duration.
Configuration:
- Block display, entity display, and HUD position can be adjusted in the client side config.
- Cooldown times and enchantment settings can be adjusted in the server side config.
Compatibility:
- If Jade is installed, its overlay will be shown instead of the builtin one. This is configurable. Requires version 0.8.0+.
- If Enchantment descriptions is installed, the details of each enchantment will be displayed in-game.
- Compatible with Spyglass improvements. Spyglass enchantments can be used if the spyglass is placed in the curio/trinkets slot. Requires Accessories/Accessories compat layer for 1.21.1-0.7.0, curios/trinkets for 1.20.1 or 0.8.0+.
- Precision can be made compatible with ranged weapons from other mods from versions 1.21.1-0.7.0 or 0.8.0+. Check the github readme for details.
Modpacks:
- This mod can be included in any Modrinth modpack.
Available Versions
How to Install Useful Spyglass on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.1).
Install Mod
Open the mod browser in the dashboard and search for "Useful Spyglass". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.1, 1.20.1, 1.19.2 (+1 more)
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Useful Spyglass server crashes on startup – what to do?
Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.1). You can switch loaders with one click in the panel.
Is Useful Spyglass compatible with fabric and forge and neoforge?
Useful Spyglass officially supports fabric, forge, neoforge for Minecraft 1.21.1, 1.20.1, 1.19.2. Note: Forge and Fabric mods are NOT cross-compatible – pick one loader and stick with it. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Useful Spyglass – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Useful Spyglass consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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