How Do I Add Mods to a Gravel Host Project Zomboid Server?

To add mods to a Gravel Host Project Zomboid server, stop the server, create a backup, then add each mod’s numeric Steam Workshop ID to WorkshopItems= and its text Mod ID to Mods= in the active server configuration. Map mods also need their folder name in Map=. Save the file, restart the server, and verify the download and loading messages in the console.

Gravel Host confirms that its Project Zomboid hosting supports mod installation, file access, and settings management through its control panel. The exact menu names can vary with the current panel interface, so use the dedicated Workshop or mod tool if your server shows one; otherwise, edit the active configuration file directly.

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Before adding mods

• An active Gravel Host Project Zomboid server
• Access to the Gravel Host control panel
• Steam Workshop pages for the mods you want to install
• A current backup of the world, configuration, sandbox settings, and account or database files
• A mod list compatible with the server’s Project Zomboid branch, such as Build 41 or Build 42

Back up an existing world before changing its mod list. Mods that add vehicles, items, persistent objects, or map data can affect save files, and removing one later may leave the world unstable.

Workshop ID versus Mod ID

You normally need two different identifiers for a mod:

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The Workshop ID is usually the number after ?id= in the Steam Workshop URL. For example, in a URL ending in ?id=2875848298, the Workshop ID is 2875848298.

The Mod ID is a separate text value supplied by the author, commonly in the Workshop description or installation instructions. If necessary, it can also be found in the mod’s mod.info file. These values are not interchangeable: a server can download a Workshop item successfully while failing to activate it if its Mod ID is absent or incorrect.

Method 1: Use the Gravel Host panel

1. Log in to Gravel Host and open your Project Zomboid server.
2. Stop the server completely.
3. Look for a Workshop, Mods, Files, File Manager, Configuration Files, or similar option. Gravel Host’s public information confirms panel-based mod and file management, but it does not guarantee one fixed menu label.
4. Search for or enter the desired Workshop item, then install or save it.
5. After installation, inspect the generated configuration if possible. Confirm that the numeric Workshop ID appears under WorkshopItems= and the exact text Mod ID appears under Mods=.
6. Save the changes and restart the server.

If the panel downloads the item but the mod has no effect in-game, use the configuration editor or file manager to check both settings manually. A one-click installer may populate the Workshop list without correctly activating every Mod ID, particularly when an item contains multiple modules or dependencies.

Method 2: Edit the server configuration manually

1. Stop the server from the Gravel Host control panel.
2. Open Files, File Manager, or Configuration Files, depending on the current interface.
3. Find the .ini file for the server preset you actually launch. It may be named after your server or use a common name such as servertest.ini. Do not edit a similarly named preset unless it is the active one.
4. Open the file in the panel’s text or configuration editor.
5. Add the Workshop IDs to WorkshopItems= and the Mod IDs to Mods=.
6. Save the file, then restart the server.

For one mod, the relevant lines may look like this:

WorkshopItems=2875848298
Mods=BB_CommonSense

For several mods, separate entries with semicolons:

WorkshopItems=2875848298;3171167894;2886832257
Mods=BB_CommonSense;damnlib;82jeepJ10

Use semicolons, not commas, and copy the Mod IDs exactly, including capitalization. Avoid adding spaces unless the editor inserts them itself. The two lines do not necessarily contain the same number of entries or matching positions: one Workshop item can contain multiple Mod IDs, and a mod can require separate Workshop dependencies.

Dependencies: install the required items too

Before saving the list, open each mod’s Workshop page and check its Required items section and author instructions.

1. Add every required Workshop item’s numeric ID to WorkshopItems=.
2. Add each required library’s Mod ID to Mods= when the author says it must be activated.
3. Follow the author’s recommended order, especially for libraries and frameworks.

A missing dependency can allow the server to start while causing missing items, broken vehicles, errors, or partially working features. Do not assume that subscribing to a Steam Collection automatically configures the server.

How to add a map mod

Map mods usually require three pieces of configuration: the Workshop ID, the Mod ID, and the map folder name. A typical setup looks like this:

WorkshopItems=1234567890
Mods=ExampleMapMod
Map=ExampleMapFolder;Muldraugh, KY

Replace ExampleMapFolder with the exact folder name specified by the map author. It may not match the Workshop title. Use the singular Map= key; do not invent a Maps= setting. Preserve the map order required by the author, because overlapping or connected maps may depend on a particular sequence.

A map can download and appear in the mod list while still failing to appear in the world if its folder name is missing or incorrect in Map=.

Restart and verify the installation

1. Save the configuration and start the server.
2. Watch the Gravel Host console for Steam Workshop download activity.
3. Confirm that the server finishes starting without mod-loading errors.
4. Join with a test client using the same Project Zomboid branch as the server.
5. Accept the Workshop download prompt if the client receives one.
6. Test the mod’s actual content, not only whether the server starts.
7. For a map, check that the intended locations appear in the correct world.
8. Have another player connect before treating the installation as complete.

Players generally do not need to manually install every item first, but their clients must be able to download the server’s required Workshop content and must use a compatible branch. A Steam Collection is useful for sharing a mod list, but it does not replace the server’s WorkshopItems=, Mods=, or Map= configuration.

Troubleshooting

Adding mods to an existing world safely

Adding a cosmetic or isolated feature is generally easier to test than changing world-generation or persistent content. For an established save:

• Keep the backup until the server has completed a successful play session.
• Add one mod, or one dependency group, at a time when practical.
• Test with a clean client so an old local cache does not hide a problem.
• Be especially cautious with map, vehicle, item, and world-object mods.
• Do not casually remove a mod that has already written items or objects to the save.

For a large modpack, test the full configuration on a separate world before applying it to the community’s main save.

Panel installation or manual editing?

The panel method is the best starting point for beginners and small mod lists because it can reduce typing errors and may automate part of the configuration. Manual editing is the more dependable fallback when you need to see both ID lists, add a map, control dependency order, or diagnose a download-versus-activation problem.

Neither method removes the need to verify the resulting configuration. Gravel Host’s panel labels and shortcuts may change, while the underlying Project Zomboid settings remain the important part: numeric Workshop IDs for downloading, text Mod IDs for activation, and map folder names for map placement.

Related hosting choices

Gravel Host is suited to administrators who want managed hosting with panel access, file access, backups, and Project Zomboid mod support. Its Project Zomboid page advertises plans from a displayed starting price, but plan displays can change, so confirm the current price and resources at checkout. A low-tier plan should not be assumed to support every player count or heavily modded setup.

Self-hosting avoids a hosting subscription but requires hardware, bandwidth, port forwarding, updates, backups, and Steam server administration. A general VPS offers root access and flexibility, but you must install and maintain the game server yourself. Other managed hosts publish similar Workshop-ID and Mod-ID workflows, but their current pricing and performance should be compared separately.

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