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# Auto-download from Modrinth
[Modrinth](https://modrinth.com/) is an open source modding platform with a clean, easy to use website for finding [Fabric, Forge, etc mods](https://modrinth.com/mods) and [Paper, etc plugins](https://modrinth.com/plugins), and [datapacks](https://modrinth.com/datapacks). At startup, the container will automatically locate and download the newest versions of mod/plugin files that correspond to the `TYPE` and `VERSION` in use. Older file versions downloaded previously will automatically be cleaned up.
## Usage
To use this feature, set the environment variable `MODRINTH_PROJECTS` to a comma or newline separated list of projects.
Each project entry can be any of the following combinations where a colon (`:`) is used to separate the different parts:
```
Project
Project : Version
Project : Release Type
Prefix : Project
Prefix : Project : Version
Prefix : Project : Release Type
@ Listing File
```
Where:
- **Project** is the project slug or ID, see below
- **Version** is the version ID (such as "Oa9ZDzZq") or number (such as "2.21.2"). When omitted, the latest release version will be selected. Using version ID will override Minecraft and loader compatibility checks.
- **Release Type** is `release`, `beta`, or `alpha` indicating the latest version to select.
- **Prefix** is `datapack`, `fabric`, `forge`, or `paper`
- The `datapack` prefix is optional when running a vanilla server
- The `fabric`, `forge`, and `paper` prefixes allow for installing mods/plugins that differ from server's `TYPE`. Using [Sinytra Connector](https://modrinth.com/mod/connector) is an example of this, where Fabric mods can be loaded into a NeoForge server.
- **Listing file** is a container path to a file containing a list of projects
!!! tip "Project ID"
The project ID can be copied to the clipboard from the project page menu:
![Modrinth copy project ID](../img/modrinth-copy-project-id.png)
!!! tip "Project Slug"
The project slug is the part of the URL that follows `/mod/`, `/plugin/`, or `/datapack/`. For example, this one is "essentialsx".
![](../img/modrinth-plugin-project-slug.png)
!!! tip "Version number and ID"
The version number and ID are located in the metadata panel on a version specific page, such as <https://modrinth.com/plugin/essentialsx/version/2.21.2>
![Version ID](../img/modrinth-version-id.drawio.png)
### Examples
| Description | Example projects entry |
|---------------------------------|-------------------------------------------------------|
| Select latest version | `fabric-api` |
| Select specific version | `fabric-api:bQZpGIz0`<br/>`fabric-api:0.119.2+1.21.4` |
| Select latest beta version | `fabric-api:beta` |
| Latest version using project ID | `P7dR8mSH` |
| Latest version of datapack | `datapack:terralith` |
| Specific version of datapack | `datapack:terralith:2.5.5` |
| Mod loader override | `fabric:fabric-api`<br/>`fabric:fabric-api:bQZpGIz0` |
| Projects Listing File | `@/path/to/modrinth-mods.txt` |
### Notes
!!! info "More about listing files"
Each line in the listing file is processed as one of the references above; however, blank lines and comments that start with `#` are ignored.
Make sure to place the listing file in a mounted directory/volume or declare an appropriate mount for it.
For example, `MODRINTH_PROJECTS` can be set to "@/extras/modrinth-mods.txt", assuming "/extras" has been added to `volumes` section, where the container file `/extras/modrinth-mods.txt` contains
```text
# This comment is ignored
fabric-api
# This and previous blank line are ignore
cloth-config
datapack:terralith
```
!!! note "Auto-removal"
Entries that are removed from the `MODRINTH_PROJECTS` list will be automatically removed from the `mods` or `plugins` directory. This is useful for removing mods/plugins that are no longer needed. An empty `MODRINTH_PROJECTS` list will remove all mods/plugins.
!!! note "Disable processing"
To temporarily disable processing of the `MODRINTH_PROJECTS` list, then comment out the `MODRINTH_PROJECTS` environment variable.
## Version from Projects
When the environment variable `VERSION_FROM_MODRINTH_PROJECTS` is set to "true" the Minecraft [`VERSION`](../versions/minecraft.md) will be automatically determined by looking at the most recent version of Minecraft that is supported by all the projects provided in `MODRINTH_PROJECTS`.
!!! example
Given the environment variables
```yaml
MODRINTH_PROJECTS: |
viaversion
viabackwards
griefprevention
discordsrv
VERSION_FROM_MODRINTH_PROJECTS: true
```
Let's say all are supported on Minecraft up to 1.21.8 except griefprevention, which is only supported up to 1.21.7. In that case, `VERSION` will be automatically set to 1.21.7.
## Extra options
`MODRINTH_DOWNLOAD_DEPENDENCIES`
: Can be set to `none` (the default), `required`, or `optional` to download required and/or optional dependencies.
`MODRINTH_PROJECTS_DEFAULT_VERSION_TYPE`
: The version type is used to determine the newest version to use from each project. The allowed values are `release` (default), `beta`, `alpha`. Setting to `beta` will pick up both release and beta versions. Setting to `alpha` will pick up release, beta, and alpha versions.
`MODRINTH_LOADER`
: When using a custom server, set this to specify which loader type will be requested during lookups