
Mob Spider Climb
Give mobs the ability to climb walls like spiders!
Screenshots

About this Mod
Mob Spider Climb
Gives any mob (that has ground based navigation, like zombies) the ability to climb walls like spiders! Pairs well with mods that add mob block breaking behavior, like Improved Mobs, and mods that add block physics, like Simple Block Physics, to create a truly intense defensive experience where you can't get away from the mobs!
Note that the pathing AI is quite literally the same as that of the spider, so it is often... unelegant, at times. Future updates may address this!
Configuration
climbingMobsAllowList: A list of mobs (hostile, passive, you name it) to allow to use climbing behavior.
- Only actually works with mobs that natively use the default ground navigation AI, which thankfully is most mobs, but flying mobs like phantoms, swimming mobs like guardians, and bouncing mobs like slimes won't be affected if added.
- Modded mobs may work as well, just be sure to use lead with the mod namespace! I.e. "modname:mobname", like you would use if you created it with the 'summon' command. If it doesn't work, it's likely that the mob doesn't use the ground navigation AI.
- If you notice your config resetting to default, that probably means you've given it invalid mob names. Double check spelling, and ensure that your "modname:mobname" also works with the summon command!
- climbingTag: NBTTag required for mob to use climbing behavior. Leave as empty double quotes (default) to not require a tag. For example, a value of "canClimb" would mean that only mobs with the "canClimb" nbt tag could climb, such as those summoned with the command...
/summon minecraft:zombie ~ ~ ~ {Tags: ["canClimb"]}
useAllowlistAsBanlist: Uses the allowlist as a banlist, attempting to add climbing behavior to all mobs EXCEPT those listed in climbingMobsAllowlist.
Available Versions
How to Install Mob Spider Climb on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set forge Loader
In the panel under "Egg", select the forge loader and matching Minecraft version (1.21.1).
Install Mod
Open the mod browser in the dashboard and search for "Mob Spider Climb". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.1, 1.20.1, 1.18.2 (+1 more)
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Mob Spider Climb server crashes on startup – what to do?
Most common cause: wrong forge 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 Mob Spider Climb compatible with forge?
Mob Spider Climb officially supports forge for Minecraft 1.21.1, 1.20.1, 1.18.2. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Mob Spider Climb – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Mob Spider Climb 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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