diff --git a/app/Http/Controllers/Api/V0/ApiController.php b/app/Http/Controllers/Api/V0/ApiController.php
index e6c3955..588e047 100644
--- a/app/Http/Controllers/Api/V0/ApiController.php
+++ b/app/Http/Controllers/Api/V0/ApiController.php
@@ -7,7 +7,11 @@ use Illuminate\Support\Str;
 
 class ApiController extends Controller
 {
-    public static function shouldInclude(string $relationship): bool
+    /**
+     * Determine if the given relationship should be included in the request. If more than one relationship is provided,
+     * only one needs to be present in the request for this method to return true.
+     */
+    public static function shouldInclude(string|array $relationships): bool
     {
         $param = request()->get('include');
 
@@ -17,6 +21,16 @@ class ApiController extends Controller
 
         $includeValues = explode(',', Str::lower($param));
 
-        return in_array(Str::lower($relationship), $includeValues);
+        if (is_array($relationships)) {
+            foreach ($relationships as $relationship) {
+                if (in_array(Str::lower($relationship), $includeValues)) {
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
+        return in_array(Str::lower($relationships), $includeValues);
     }
 }
diff --git a/app/Http/Controllers/Api/V0/ModController.php b/app/Http/Controllers/Api/V0/ModController.php
index 1f69eb2..9065bbc 100644
--- a/app/Http/Controllers/Api/V0/ModController.php
+++ b/app/Http/Controllers/Api/V0/ModController.php
@@ -2,6 +2,7 @@
 
 namespace App\Http\Controllers\Api\V0;
 
+use App\Http\Filters\V1\ModFilter;
 use App\Http\Requests\Api\V0\StoreModRequest;
 use App\Http\Requests\Api\V0\UpdateModRequest;
 use App\Http\Resources\Api\V0\ModResource;
@@ -12,9 +13,9 @@ class ModController extends ApiController
     /**
      * Display a listing of the resource.
      */
-    public function index()
+    public function index(ModFilter $filters)
     {
-        return ModResource::collection(Mod::paginate());
+        return ModResource::collection(Mod::filter($filters)->paginate());
     }
 
     /**
diff --git a/app/Http/Controllers/Api/V0/UsersController.php b/app/Http/Controllers/Api/V0/UsersController.php
index a93f52c..8bf7824 100644
--- a/app/Http/Controllers/Api/V0/UsersController.php
+++ b/app/Http/Controllers/Api/V0/UsersController.php
@@ -2,6 +2,7 @@
 
 namespace App\Http\Controllers\Api\V0;
 
+use App\Http\Filters\V1\UserFilter;
 use App\Http\Requests\Api\V0\StoreUserRequest;
 use App\Http\Requests\Api\V0\UpdateUserRequest;
 use App\Http\Resources\Api\V0\UserResource;
@@ -12,9 +13,9 @@ class UsersController extends ApiController
     /**
      * Display a listing of the resource.
      */
-    public function index()
+    public function index(UserFilter $filters)
     {
-        return UserResource::collection(User::paginate());
+        return UserResource::collection(User::filter($filters)->paginate());
     }
 
     /**
diff --git a/app/Http/Filters/V1/ModFilter.php b/app/Http/Filters/V1/ModFilter.php
new file mode 100644
index 0000000..722ba71
--- /dev/null
+++ b/app/Http/Filters/V1/ModFilter.php
@@ -0,0 +1,116 @@
+<?php
+
+namespace App\Http\Filters\V1;
+
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Support\Str;
+
+class ModFilter extends QueryFilter
+{
+    // TODO: Many of these are repeated across UserFilter and ModFilter. Consider refactoring into a shared trait.
+    //       Also, consider using common filter types and making the field names dynamic.
+
+    public function name(string $value): Builder
+    {
+        // The API handles the wildcard character as an asterisk (*), but the database uses the percentage sign (%).
+        $like = Str::replace('*', '%', $value);
+
+        return $this->builder->where('name', 'like', $like);
+    }
+
+    public function slug(string $value): Builder
+    {
+        // The API handles the wildcard character as an asterisk (*), but the database uses the percentage sign (%).
+        $like = Str::replace('*', '%', $value);
+
+        return $this->builder->where('slug', 'like', $like);
+    }
+
+    public function teaser(string $value): Builder
+    {
+        // The API handles the wildcard character as an asterisk (*), but the database uses the percentage sign (%).
+        $like = Str::replace('*', '%', $value);
+
+        return $this->builder->where('teaser', 'like', $like);
+    }
+
+    public function source_code_link(string $value): Builder
+    {
+        // The API handles the wildcard character as an asterisk (*), but the database uses the percentage sign (%).
+        $like = Str::replace('*', '%', $value);
+
+        return $this->builder->where('source_code_link', 'like', $like);
+    }
+
+    public function created_at(string $value): Builder
+    {
+        // The API allows for a range of dates to be passed as a comma-separated list.
+        $dates = explode(',', $value);
+        if (count($dates) > 1) {
+            return $this->builder->whereBetween('created_at', $dates);
+        }
+
+        return $this->builder->whereDate('created_at', $value);
+    }
+
+    public function updated_at(string $value): Builder
+    {
+        // The API allows for a range of dates to be passed as a comma-separated list.
+        $dates = explode(',', $value);
+        if (count($dates) > 1) {
+            return $this->builder->whereBetween('updated_at', $dates);
+        }
+
+        return $this->builder->whereDate('updated_at', $value);
+    }
+
+    public function published_at(string $value): Builder
+    {
+        // The API allows for a range of dates to be passed as a comma-separated list.
+        $dates = explode(',', $value);
+        if (count($dates) > 1) {
+            return $this->builder->whereBetween('published_at', $dates);
+        }
+
+        return $this->builder->whereDate('published_at', $value);
+    }
+
+    public function featured(string $value): Builder
+    {
+        // We need to convert the string user input to a boolean, or null if it's not a valid "truthy/falsy" value.
+        $value = filter_var($value, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE);
+
+        // This column is not nullable.
+        if ($value === null) {
+            return $this->builder;
+        }
+
+        return $this->builder->where('featured', $value);
+    }
+
+    public function contains_ads(string $value): Builder
+    {
+        // We need to convert the string user input to a boolean, or null if it's not a valid "truthy/falsy" value.
+        $value = filter_var($value, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE);
+
+        // This column is not nullable.
+        if ($value === null) {
+            return $this->builder;
+        }
+
+        return $this->builder->where('contains_ads', $value);
+    }
+
+    public function contains_ai_content(string $value): Builder
+    {
+        // We need to convert the string user input to a boolean, or null if it's not a valid "truthy/falsy" value.
+        $value = filter_var($value, FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE);
+
+        // This column is not nullable.
+        if ($value === null) {
+            return $this->builder;
+        }
+
+        return $this->builder->where('contains_ai_content', $value);
+    }
+}
diff --git a/app/Http/Filters/V1/QueryFilter.php b/app/Http/Filters/V1/QueryFilter.php
new file mode 100644
index 0000000..0e4b8e6
--- /dev/null
+++ b/app/Http/Filters/V1/QueryFilter.php
@@ -0,0 +1,37 @@
+<?php
+
+namespace App\Http\Filters\V1;
+
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Http\Request;
+
+abstract class QueryFilter
+{
+    protected Builder $builder;
+
+    public function __construct(protected Request $request) {}
+
+    public function apply(Builder $builder): Builder
+    {
+        $this->builder = $builder;
+
+        foreach ($this->request->all() as $attribute => $value) {
+            if (method_exists($this, $attribute)) {
+                $this->$attribute($value);
+            }
+        }
+
+        return $this->builder;
+    }
+
+    protected function filter(array $filters): Builder
+    {
+        foreach ($filters as $attribute => $value) {
+            if (method_exists($this, $attribute)) {
+                $this->$attribute($value);
+            }
+        }
+
+        return $this->builder;
+    }
+}
diff --git a/app/Http/Filters/V1/UserFilter.php b/app/Http/Filters/V1/UserFilter.php
new file mode 100644
index 0000000..9684150
--- /dev/null
+++ b/app/Http/Filters/V1/UserFilter.php
@@ -0,0 +1,42 @@
+<?php
+
+namespace App\Http\Filters\V1;
+
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Support\Str;
+
+class UserFilter extends QueryFilter
+{
+    // TODO: Many of these are repeated across UserFilter and ModFilter. Consider refactoring into a shared trait.
+    //       Also, consider using common filter types and making the field names dynamic.
+
+    public function name(string $value): Builder
+    {
+        // The API handles the wildcard character as an asterisk (*), but the database uses the percentage sign (%).
+        $like = Str::replace('*', '%', $value);
+
+        return $this->builder->where('name', 'like', $like);
+    }
+
+    public function created_at(string $value): Builder
+    {
+        // The API allows for a range of dates to be passed as a comma-separated list.
+        $dates = explode(',', $value);
+        if (count($dates) > 1) {
+            return $this->builder->whereBetween('created_at', $dates);
+        }
+
+        return $this->builder->whereDate('created_at', $value);
+    }
+
+    public function updated_at(string $value): Builder
+    {
+        // The API allows for a range of dates to be passed as a comma-separated list.
+        $dates = explode(',', $value);
+        if (count($dates) > 1) {
+            return $this->builder->whereBetween('updated_at', $dates);
+        }
+
+        return $this->builder->whereDate('updated_at', $value);
+    }
+}
diff --git a/app/Http/Resources/Api/V0/LicenseResource.php b/app/Http/Resources/Api/V0/LicenseResource.php
new file mode 100644
index 0000000..a64ebe2
--- /dev/null
+++ b/app/Http/Resources/Api/V0/LicenseResource.php
@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Http\Resources\Api\V0;
+
+use App\Models\License;
+use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\JsonResource;
+
+/** @mixin License */
+class LicenseResource extends JsonResource
+{
+    public function toArray(Request $request): array
+    {
+        return [
+            'type' => 'license',
+            'id' => $this->id,
+            'attributes' => [
+                'name' => $this->name,
+                'link' => $this->link,
+                'created_at' => $this->created_at,
+                'updated_at' => $this->updated_at,
+            ],
+        ];
+    }
+}
diff --git a/app/Http/Resources/Api/V0/ModResource.php b/app/Http/Resources/Api/V0/ModResource.php
index 6b2d2e9..1737e26 100644
--- a/app/Http/Resources/Api/V0/ModResource.php
+++ b/app/Http/Resources/Api/V0/ModResource.php
@@ -45,6 +45,19 @@ class ModResource extends JsonResource
                         'self' => $user->profileUrl(),
                     ],
                 ])->toArray(),
+                'versions' => $this->versions->map(fn ($version) => [
+                    'data' => [
+                        'type' => 'version',
+                        'id' => $version->id,
+                    ],
+
+                    // TODO: The download link to the version can be placed here, but I'd like to track the number of
+                    //       downloads that are made, so we'll need a new route/feature for that. #35
+                    'links' => [
+                        'self' => $version->link,
+                    ],
+
+                ])->toArray(),
                 'license' => [
                     [
                         'data' => [
@@ -54,15 +67,17 @@ class ModResource extends JsonResource
                     ],
                 ],
             ],
-
             'includes' => $this->when(
-                ApiController::shouldInclude('users'),
-                fn () => $this->users->map(fn ($user) => new UserResource($user))
+                ApiController::shouldInclude(['users', 'license', 'versions']),
+                fn () => collect([
+                    'users' => $this->users->map(fn ($user) => new UserResource($user)),
+                    'license' => new LicenseResource($this->license),
+                    'versions' => $this->versions->map(fn ($version) => new ModVersionResource($version)),
+                ])
+                    ->filter(fn ($value, $key) => ApiController::shouldInclude($key))
+                    ->flatten(1)
+                    ->values()
             ),
-
-            // TODO: Provide 'included' data for attached 'license':
-            //new LicenseResource($this->license)
-
             'links' => [
                 'self' => route('mod.show', [
                     'mod' => $this->id,
diff --git a/app/Http/Resources/Api/V0/ModVersionResource.php b/app/Http/Resources/Api/V0/ModVersionResource.php
new file mode 100644
index 0000000..d42008d
--- /dev/null
+++ b/app/Http/Resources/Api/V0/ModVersionResource.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace App\Http\Resources\Api\V0;
+
+use App\Models\ModVersion;
+use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\JsonResource;
+
+/** @mixin ModVersion */
+class ModVersionResource extends JsonResource
+{
+    /**
+     * Transform the resource into an array.
+     */
+    public function toArray(Request $request): array
+    {
+        return [
+            'type' => 'mod_version',
+            'id' => $this->id,
+            'attributes' => [
+                'hub_id' => $this->hub_id,
+                'mod_id' => $this->mod_id,
+                'version' => $this->version,
+
+                // TODO: This should only be visible on the mod version show route(?) which doesn't exist.
+                //'description' => $this->when(
+                //    $request->routeIs('api.v0.modversion.show'),
+                //    $this->description
+                //),
+
+                // TODO: The download link to the version can be placed here, but I'd like to track the number of
+                //       downloads that are made, so we'll need a new route/feature for that. #35
+                'link' => $this->link,
+
+                'spt_version_id' => $this->spt_version_id,
+                'virus_total_link' => $this->virus_total_link,
+                'downloads' => $this->downloads,
+                'created_at' => $this->created_at,
+                'updated_at' => $this->updated_at,
+                'published_at' => $this->published_at,
+            ],
+            'relationships' => [
+                'spt_version' => [
+                    [
+                        'data' => [
+                            'type' => 'spt_version',
+                            'id' => $this->spt_version_id,
+                        ],
+                    ],
+                ],
+            ],
+        ];
+    }
+}
diff --git a/app/Http/Resources/Api/V0/UserResource.php b/app/Http/Resources/Api/V0/UserResource.php
index f4e63d1..903012f 100644
--- a/app/Http/Resources/Api/V0/UserResource.php
+++ b/app/Http/Resources/Api/V0/UserResource.php
@@ -2,6 +2,7 @@
 
 namespace App\Http\Resources\Api\V0;
 
+use App\Http\Controllers\Api\V0\ApiController;
 use App\Models\User;
 use Illuminate\Http\Request;
 use Illuminate\Http\Resources\Json\JsonResource;
@@ -9,9 +10,6 @@ use Illuminate\Http\Resources\Json\JsonResource;
 /** @mixin User */
 class UserResource extends JsonResource
 {
-    /**
-     * Transform the resource into an array.
-     */
     public function toArray(Request $request): array
     {
         return [
@@ -21,6 +19,7 @@ class UserResource extends JsonResource
                 'name' => $this->name,
                 'user_role_id' => $this->user_role_id,
                 'created_at' => $this->created_at,
+                'updated_at' => $this->updated_at,
             ],
             'relationships' => [
                 'user_role' => [
@@ -30,10 +29,10 @@ class UserResource extends JsonResource
                     ],
                 ],
             ],
-
-            // TODO: Provide 'included' data for attached 'user_role'
-            //'included' => [new UserRoleResource($this->role)],
-
+            'includes' => $this->when(
+                ApiController::shouldInclude('user_role'),
+                new UserRoleResource($this->role)
+            ),
             'links' => [
                 'self' => $this->profileUrl(),
             ],
diff --git a/app/Http/Resources/Api/V0/UserRoleResource.php b/app/Http/Resources/Api/V0/UserRoleResource.php
new file mode 100644
index 0000000..51d5146
--- /dev/null
+++ b/app/Http/Resources/Api/V0/UserRoleResource.php
@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Http\Resources\Api\V0;
+
+use App\Models\UserRole;
+use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\JsonResource;
+
+/** @mixin UserRole */
+class UserRoleResource extends JsonResource
+{
+    public function toArray(Request $request): array
+    {
+        return [
+            'type' => 'user_role',
+            'id' => $this->id,
+            'attributes' => [
+                'name' => $this->name,
+                'short_name' => $this->short_name,
+                'description' => $this->description,
+                'color_class' => $this->color_class,
+            ],
+        ];
+    }
+}
diff --git a/app/Models/Mod.php b/app/Models/Mod.php
index 8a0e512..193cc17 100644
--- a/app/Models/Mod.php
+++ b/app/Models/Mod.php
@@ -2,8 +2,10 @@
 
 namespace App\Models;
 
+use App\Http\Filters\V1\QueryFilter;
 use App\Models\Scopes\DisabledScope;
 use App\Models\Scopes\PublishedScope;
+use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Database\Eloquent\Casts\Attribute;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
@@ -144,6 +146,14 @@ class Mod extends Model
         };
     }
 
+    /**
+     * Scope a query by applying QueryFilter filters.
+     */
+    public function scopeFilter(Builder $builder, QueryFilter $filters): Builder
+    {
+        return $filters->apply($builder);
+    }
+
     /**
      * The attributes that should be cast to native types.
      */
diff --git a/app/Models/User.php b/app/Models/User.php
index bfbfa90..157248b 100644
--- a/app/Models/User.php
+++ b/app/Models/User.php
@@ -2,10 +2,12 @@
 
 namespace App\Models;
 
+use App\Http\Filters\V1\QueryFilter;
 use App\Notifications\ResetPassword;
 use App\Notifications\VerifyEmail;
 use App\Traits\HasCoverPhoto;
 use Illuminate\Contracts\Auth\MustVerifyEmail;
+use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Relations\BelongsToMany;
@@ -136,6 +138,14 @@ class User extends Authenticatable implements MustVerifyEmail
         return $this->belongsTo(UserRole::class, 'user_role_id');
     }
 
+    /**
+     * Scope a query by applying QueryFilter filters.
+     */
+    public function scopeFilter(Builder $builder, QueryFilter $filters): Builder
+    {
+        return $filters->apply($builder);
+    }
+
     /**
      * Get the disk that profile photos should be stored on.
      */