diff --git a/app/Http/Controllers/Api/ImageGalleryApiController.php b/app/Http/Controllers/Api/ImageGalleryApiController.php
index 85c0c3cef..a9fb3b103 100644
--- a/app/Http/Controllers/Api/ImageGalleryApiController.php
+++ b/app/Http/Controllers/Api/ImageGalleryApiController.php
@@ -2,6 +2,7 @@
 
 namespace BookStack\Http\Controllers\Api;
 
+use BookStack\Entities\Models\Page;
 use BookStack\Uploads\Image;
 use BookStack\Uploads\ImageRepo;
 use Illuminate\Http\Request;
@@ -22,7 +23,7 @@ class ImageGalleryApiController extends ApiController
         return [
             'create' => [
                 'type'  => ['required', 'string', 'in:gallery,drawio'],
-                'uploaded_to' => ['required', 'integer', 'exists:pages,id'],
+                'uploaded_to' => ['required', 'integer'],
                 'image' => ['required', 'file', ...$this->getImageValidationRules()],
                 'name'  => ['string', 'max:180'],
             ],
@@ -52,10 +53,17 @@ class ImageGalleryApiController extends ApiController
      */
     public function create(Request $request)
     {
+        $this->checkPermission('image-create-all');
         $data = $this->validate($request, $this->rules()['create']);
+        Page::visible()->findOrFail($data['uploaded_to']);
 
         $image = $this->imageRepo->saveNew($data['image'], $data['type'], $data['uploaded_to']);
 
+        if (isset($data['name'])) {
+            $image->refresh();
+            $image->update(['name' => $data['name']]);
+        }
+
         return response()->json($this->formatForSingleResponse($image));
     }
 
@@ -64,8 +72,7 @@ class ImageGalleryApiController extends ApiController
      */
     public function read(string $id)
     {
-        $image = $this->imageRepo->getById($id);
-        $this->checkOwnablePermission('page-view', $image->getPage());
+        $image = Image::query()->scopes(['visible'])->findOrFail($id);
 
         return response()->json($this->formatForSingleResponse($image));
     }
diff --git a/app/Uploads/Image.php b/app/Uploads/Image.php
index 038e7c199..0ab0b612a 100644
--- a/app/Uploads/Image.php
+++ b/app/Uploads/Image.php
@@ -49,7 +49,7 @@ class Image extends Model
      *
      * @throws \Exception
      */
-    public function getThumb(int $width, int $height, bool $keepRatio = false): string
+    public function getThumb(?int $width, ?int $height, bool $keepRatio = false): string
     {
         return app()->make(ImageService::class)->getThumbnail($this, $width, $height, $keepRatio);
     }
diff --git a/tests/Api/ImageGalleryApiTest.php b/tests/Api/ImageGalleryApiTest.php
new file mode 100644
index 000000000..17c90518c
--- /dev/null
+++ b/tests/Api/ImageGalleryApiTest.php
@@ -0,0 +1,347 @@
+<?php
+
+namespace Tests\Api;
+
+use BookStack\Entities\Models\Page;
+use BookStack\Uploads\Image;
+use Tests\TestCase;
+
+class ImageGalleryApiTest extends TestCase
+{
+    use TestsApi;
+
+    protected string $baseEndpoint = '/api/image-gallery';
+
+    public function test_index_endpoint_returns_expected_image_and_count()
+    {
+        $this->actingAsApiAdmin();
+        $imagePage = $this->entities->page();
+        $data = $this->files->uploadGalleryImageToPage($this, $imagePage);
+        $image = Image::findOrFail($data['response']->id);
+
+        $resp = $this->getJson($this->baseEndpoint . '?count=1&sort=+id');
+        $resp->assertJson(['data' => [
+            [
+                'id' => $image->id,
+                'name' => $image->name,
+                'url' => $image->url,
+                'path' => $image->path,
+                'type' => 'gallery',
+                'uploaded_to' => $imagePage->id,
+                'created_by' => $this->users->admin()->id,
+                'updated_by' => $this->users->admin()->id,
+            ],
+        ]]);
+
+        $resp->assertJson(['total' => Image::query()->count()]);
+    }
+
+    public function test_index_endpoint_doesnt_show_images_for_those_uploaded_to_non_visible_pages()
+    {
+        $this->actingAsApiEditor();
+        $imagePage = $this->entities->page();
+        $data = $this->files->uploadGalleryImageToPage($this, $imagePage);
+        $image = Image::findOrFail($data['response']->id);
+
+        $resp = $this->getJson($this->baseEndpoint . '?filter[id]=' . $image->id);
+        $resp->assertJsonCount(1, 'data');
+        $resp->assertJson(['total' => 1]);
+
+        $this->permissions->disableEntityInheritedPermissions($imagePage);
+
+        $resp = $this->getJson($this->baseEndpoint . '?filter[id]=' . $image->id);
+        $resp->assertJsonCount(0, 'data');
+        $resp->assertJson(['total' => 0]);
+    }
+
+    public function test_index_endpoint_doesnt_show_other_image_types()
+    {
+        $this->actingAsApiEditor();
+        $imagePage = $this->entities->page();
+        $data = $this->files->uploadGalleryImageToPage($this, $imagePage);
+        $image = Image::findOrFail($data['response']->id);
+
+        $typesByCountExpectation = [
+            'cover_book' => 0,
+            'drawio' => 1,
+            'gallery' => 1,
+            'user' => 0,
+            'system' => 0,
+        ];
+
+        foreach ($typesByCountExpectation as $type => $count) {
+            $image->type = $type;
+            $image->save();
+
+            $resp = $this->getJson($this->baseEndpoint . '?filter[id]=' . $image->id);
+            $resp->assertJsonCount($count, 'data');
+            $resp->assertJson(['total' => $count]);
+        }
+    }
+
+    public function test_create_endpoint()
+    {
+        $this->actingAsApiAdmin();
+
+        $imagePage = $this->entities->page();
+        $resp = $this->call('POST', $this->baseEndpoint, [
+            'type' => 'gallery',
+            'uploaded_to' => $imagePage->id,
+            'name' => 'My awesome image!',
+        ], [], [
+            'image' => $this->files->uploadedImage('my-cool-image.png'),
+        ]);
+
+        $resp->assertStatus(200);
+
+        $image = Image::query()->where('uploaded_to', '=', $imagePage->id)->first();
+        $expectedUser = [
+            'id' => $this->users->admin()->id,
+            'name' => $this->users->admin()->name,
+            'slug' => $this->users->admin()->slug,
+        ];
+        $resp->assertJson([
+            'id' => $image->id,
+            'name' => 'My awesome image!',
+            'url' => $image->url,
+            'path' => $image->path,
+            'type' => 'gallery',
+            'uploaded_to' => $imagePage->id,
+            'created_by' => $expectedUser,
+            'updated_by' => $expectedUser,
+        ]);
+    }
+
+    public function test_create_endpoint_requires_image_create_permissions()
+    {
+        $user = $this->users->editor();
+        $this->actingAsForApi($user);
+        $this->permissions->removeUserRolePermissions($user, ['image-create-all']);
+
+        $makeRequest = function () {
+            return $this->call('POST', $this->baseEndpoint, []);
+        };
+
+        $resp = $makeRequest();
+        $resp->assertStatus(403);
+
+        $this->permissions->grantUserRolePermissions($user, ['image-create-all']);
+
+        $resp = $makeRequest();
+        $resp->assertStatus(422);
+    }
+
+    public function test_create_fails_if_uploaded_to_not_visible_or_not_exists()
+    {
+        $this->actingAsApiEditor();
+
+        $makeRequest = function (int $uploadedTo) {
+            return $this->call('POST', $this->baseEndpoint, [
+                'type' => 'gallery',
+                'uploaded_to' => $uploadedTo,
+                'name' => 'My awesome image!',
+            ], [], [
+                'image' => $this->files->uploadedImage('my-cool-image.png'),
+            ]);
+        };
+
+        $page = $this->entities->page();
+        $this->permissions->disableEntityInheritedPermissions($page);
+        $resp = $makeRequest($page->id);
+        $resp->assertStatus(404);
+
+        $resp = $makeRequest(Page::query()->max('id') + 55);
+        $resp->assertStatus(404);
+    }
+
+    public function test_create_has_restricted_types()
+    {
+        $this->actingAsApiEditor();
+
+        $typesByStatusExpectation = [
+            'cover_book' => 422,
+            'drawio' => 200,
+            'gallery' => 200,
+            'user' => 422,
+            'system' => 422,
+        ];
+
+        $makeRequest = function (string $type) {
+            return $this->call('POST', $this->baseEndpoint, [
+                'type' => $type,
+                'uploaded_to' => $this->entities->page()->id,
+                'name' => 'My awesome image!',
+            ], [], [
+                'image' => $this->files->uploadedImage('my-cool-image.png'),
+            ]);
+        };
+
+        foreach ($typesByStatusExpectation as $type => $status) {
+            $resp = $makeRequest($type);
+            $resp->assertStatus($status);
+        }
+    }
+
+    public function test_create_will_use_file_name_if_no_name_provided_in_request()
+    {
+        $this->actingAsApiEditor();
+
+        $imagePage = $this->entities->page();
+        $resp = $this->call('POST', $this->baseEndpoint, [
+            'type' => 'gallery',
+            'uploaded_to' => $imagePage->id,
+        ], [], [
+            'image' => $this->files->uploadedImage('my-cool-image.png'),
+        ]);
+        $resp->assertStatus(200);
+
+        $this->assertDatabaseHas('images', [
+            'type' => 'gallery',
+            'uploaded_to' => $imagePage->id,
+            'name' => 'my-cool-image.png',
+        ]);
+    }
+
+    public function test_read_endpoint()
+    {
+        $this->actingAsApiAdmin();
+        $imagePage = $this->entities->page();
+        $data = $this->files->uploadGalleryImageToPage($this, $imagePage);
+        $image = Image::findOrFail($data['response']->id);
+
+        $resp = $this->getJson($this->baseEndpoint . "/{$image->id}");
+        $resp->assertStatus(200);
+
+        $expectedUser = [
+            'id' => $this->users->admin()->id,
+            'name' => $this->users->admin()->name,
+            'slug' => $this->users->admin()->slug,
+        ];
+
+        $displayUrl = $image->getThumb(1680, null, true);
+        $resp->assertJson([
+            'id' => $image->id,
+            'name' => $image->name,
+            'url' => $image->url,
+            'path' => $image->path,
+            'type' => 'gallery',
+            'uploaded_to' => $imagePage->id,
+            'created_by' => $expectedUser,
+            'updated_by' => $expectedUser,
+            'content' => [
+                'html' => "<a href=\"{$image->url}\" target=\"_blank\"><img src=\"{$displayUrl}\" alt=\"{$image->name}\"></a>",
+                'markdown' => "![{$image->name}]({$displayUrl})",
+            ],
+        ]);
+        $this->assertStringStartsWith('http://', $resp->json('thumbs.gallery'));
+        $this->assertStringStartsWith('http://', $resp->json('thumbs.display'));
+    }
+
+    public function test_read_endpoint_provides_different_content_for_drawings()
+    {
+        $this->actingAsApiAdmin();
+        $imagePage = $this->entities->page();
+        $data = $this->files->uploadGalleryImageToPage($this, $imagePage);
+        $image = Image::findOrFail($data['response']->id);
+
+        $image->type = 'drawio';
+        $image->save();
+
+        $resp = $this->getJson($this->baseEndpoint . "/{$image->id}");
+        $resp->assertStatus(200);
+
+        $drawing = "<div drawio-diagram=\"{$image->id}\"><img src=\"{$image->url}\"></div>";
+        $resp->assertJson([
+            'id' => $image->id,
+            'content' => [
+                'html' => $drawing,
+                'markdown' => $drawing,
+            ],
+        ]);
+    }
+
+    public function test_read_endpoint_does_not_show_if_no_permissions_for_related_page()
+    {
+        $this->actingAsApiEditor();
+        $imagePage = $this->entities->page();
+        $data = $this->files->uploadGalleryImageToPage($this, $imagePage);
+        $image = Image::findOrFail($data['response']->id);
+
+        $this->permissions->disableEntityInheritedPermissions($imagePage);
+
+        $resp = $this->getJson($this->baseEndpoint . "/{$image->id}");
+        $resp->assertStatus(404);
+    }
+
+    public function test_update_endpoint()
+    {
+        $this->actingAsApiAdmin();
+        $imagePage = $this->entities->page();
+        $data = $this->files->uploadGalleryImageToPage($this, $imagePage);
+        $image = Image::findOrFail($data['response']->id);
+
+        $resp = $this->putJson($this->baseEndpoint . "/{$image->id}", [
+            'name' => 'My updated image name!',
+        ]);
+
+        $resp->assertStatus(200);
+        $resp->assertJson([
+            'id' => $image->id,
+            'name' => 'My updated image name!',
+        ]);
+        $this->assertDatabaseHas('images', [
+            'id' => $image->id,
+            'name' => 'My updated image name!',
+        ]);
+    }
+
+    public function test_update_endpoint_requires_image_delete_permission()
+    {
+        $user = $this->users->editor();
+        $this->actingAsForApi($user);
+        $imagePage = $this->entities->page();
+        $this->permissions->removeUserRolePermissions($user, ['image-update-all', 'image-update-own']);
+        $data = $this->files->uploadGalleryImageToPage($this, $imagePage);
+        $image = Image::findOrFail($data['response']->id);
+
+        $resp = $this->putJson($this->baseEndpoint . "/{$image->id}", ['name' => 'My new name']);
+        $resp->assertStatus(403);
+        $resp->assertJson($this->permissionErrorResponse());
+
+        $this->permissions->grantUserRolePermissions($user, ['image-update-all']);
+        $resp = $this->putJson($this->baseEndpoint . "/{$image->id}", ['name' => 'My new name']);
+        $resp->assertStatus(200);
+    }
+
+    public function test_delete_endpoint()
+    {
+        $this->actingAsApiAdmin();
+        $imagePage = $this->entities->page();
+        $data = $this->files->uploadGalleryImageToPage($this, $imagePage);
+        $image = Image::findOrFail($data['response']->id);
+        $this->assertDatabaseHas('images', ['id' => $image->id]);
+
+        $resp = $this->deleteJson($this->baseEndpoint . "/{$image->id}");
+
+        $resp->assertStatus(204);
+        $this->assertDatabaseMissing('images', ['id' => $image->id]);
+    }
+
+    public function test_delete_endpoint_requires_image_delete_permission()
+    {
+        $user = $this->users->editor();
+        $this->actingAsForApi($user);
+        $imagePage = $this->entities->page();
+        $this->permissions->removeUserRolePermissions($user, ['image-delete-all', 'image-delete-own']);
+        $data = $this->files->uploadGalleryImageToPage($this, $imagePage);
+        $image = Image::findOrFail($data['response']->id);
+
+        $resp = $this->deleteJson($this->baseEndpoint . "/{$image->id}");
+        $resp->assertStatus(403);
+        $resp->assertJson($this->permissionErrorResponse());
+
+        $this->permissions->grantUserRolePermissions($user, ['image-delete-all']);
+        $resp = $this->deleteJson($this->baseEndpoint . "/{$image->id}");
+        $resp->assertStatus(204);
+    }
+}
diff --git a/tests/Api/TestsApi.php b/tests/Api/TestsApi.php
index 501f28754..c566fd8de 100644
--- a/tests/Api/TestsApi.php
+++ b/tests/Api/TestsApi.php
@@ -2,15 +2,28 @@
 
 namespace Tests\Api;
 
+use BookStack\Auth\User;
+
 trait TestsApi
 {
-    protected $apiTokenId = 'apitoken';
-    protected $apiTokenSecret = 'password';
+    protected string $apiTokenId = 'apitoken';
+    protected string $apiTokenSecret = 'password';
+
+    /**
+     * Set the given user as the current logged-in user via the API driver.
+     * This does not ensure API access. The user may still lack required role permissions.
+     */
+    protected function actingAsForApi(User $user): static
+    {
+        parent::actingAs($user, 'api');
+
+        return $this;
+    }
 
     /**
      * Set the API editor role as the current user via the API driver.
      */
-    protected function actingAsApiEditor()
+    protected function actingAsApiEditor(): static
     {
         $this->actingAs($this->users->editor(), 'api');
 
@@ -20,7 +33,7 @@ trait TestsApi
     /**
      * Set the API admin role as the current user via the API driver.
      */
-    protected function actingAsApiAdmin()
+    protected function actingAsApiAdmin(): static
     {
         $this->actingAs($this->users->admin(), 'api');