diff --git a/config/alfresco/templates/webscripts/org/alfresco/repository/thumbnail/thumbnaildefinitions.get.desc.xml b/config/alfresco/templates/webscripts/org/alfresco/repository/thumbnail/thumbnaildefinitions.get.desc.xml
new file mode 100644
index 0000000000..a0695cc07e
--- /dev/null
+++ b/config/alfresco/templates/webscripts/org/alfresco/repository/thumbnail/thumbnaildefinitions.get.desc.xml
@@ -0,0 +1,9 @@
+<webscript>
+  <shortname>ThumbnailsDefinitions</shortname>
+  <description>Get the thumbnails definitions for a content resource</description>
+  <url>/api/node/{store_type}/{store_id}/{id}/content{property}/thumbnaildefinitions</url>  
+  <url>/api/path/{store_type}/{store_id}/{id}/content{property}/thumbnaildefinitions</url>  
+  <format default="json"/>
+  <authentication>user</authentication>
+  <transaction>required</transaction>
+</webscript>
\ No newline at end of file
diff --git a/config/alfresco/templates/webscripts/org/alfresco/repository/thumbnail/thumbnaildefinitions.get.js b/config/alfresco/templates/webscripts/org/alfresco/repository/thumbnail/thumbnaildefinitions.get.js
new file mode 100644
index 0000000000..960e4e72cb
--- /dev/null
+++ b/config/alfresco/templates/webscripts/org/alfresco/repository/thumbnail/thumbnaildefinitions.get.js
@@ -0,0 +1,23 @@
+function main()
+{
+   // Get the node from the URL
+   var pathSegments = url.match.split("/");
+   var reference = [ url.templateArgs.store_type, url.templateArgs.store_id ].concat(url.templateArgs.id.split("/"));
+   var node = search.findNode(pathSegments[2], reference);
+ 
+   // 404 if the node to thumbnail is not found
+   if (node == null)
+   {
+      status.setCode(status.STATUS_NOT_FOUND, "The node could not be found");
+	  return;
+   }
+   
+   // Get the thumbnail definitions
+   var thumbnailDefinitions = node.getThumbnailDefintions();
+   
+   // Add them to the model
+   model.node = node;
+   model.thumbnailDefinitions = thumbnailDefinitions; 
+}
+
+main();
\ No newline at end of file
diff --git a/config/alfresco/templates/webscripts/org/alfresco/repository/thumbnail/thumbnaildefinitions.get.json.ftl b/config/alfresco/templates/webscripts/org/alfresco/repository/thumbnail/thumbnaildefinitions.get.json.ftl
new file mode 100644
index 0000000000..705e7d0483
--- /dev/null
+++ b/config/alfresco/templates/webscripts/org/alfresco/repository/thumbnail/thumbnaildefinitions.get.json.ftl
@@ -0,0 +1,8 @@
+<#escape x as jsonUtils.encodeJSONString(x)>
+[
+	<#list thumbnailDefinitions as def>
+		"${def}"
+		<#if def_has_next>,</#if>
+	</#list>
+]
+</#escape>
\ No newline at end of file
diff --git a/config/alfresco/templates/webscripts/org/alfresco/repository/thumbnail/thumbnails.get.desc.xml b/config/alfresco/templates/webscripts/org/alfresco/repository/thumbnail/thumbnails.get.desc.xml
index ef63a79f36..e840a9208a 100644
--- a/config/alfresco/templates/webscripts/org/alfresco/repository/thumbnail/thumbnails.get.desc.xml
+++ b/config/alfresco/templates/webscripts/org/alfresco/repository/thumbnail/thumbnails.get.desc.xml
@@ -4,6 +4,6 @@
   <url>/api/node/{store_type}/{store_id}/{id}/content{property}/thumbnails</url>  
   <url>/api/path/{store_type}/{store_id}/{id}/content{property}/thumbnails</url>  
   <format default="json"/>
-  <authentication>guest</authentication>
+  <authentication>user</authentication>
   <transaction>required</transaction>
 </webscript>
\ No newline at end of file
diff --git a/source/java/org/alfresco/repo/web/scripts/thumbnail/ThumbnailServiceTest.java b/source/java/org/alfresco/repo/web/scripts/thumbnail/ThumbnailServiceTest.java
index 4ac880c2db..7a0d007341 100644
--- a/source/java/org/alfresco/repo/web/scripts/thumbnail/ThumbnailServiceTest.java
+++ b/source/java/org/alfresco/repo/web/scripts/thumbnail/ThumbnailServiceTest.java
@@ -142,6 +142,57 @@ public class ThumbnailServiceTest extends BaseWebScriptTest
         
     }
     
+    public void testThumbnailDefinitions() throws Exception
+    {
+        // Check for pdfToSWF transformation before doing test
+        if (this.contentService.getTransformer(MimetypeMap.MIMETYPE_PDF, MimetypeMap.MIMETYPE_FLASH) != null)
+        {
+            String url = "/api/node/" + pdfNode.getStoreRef().getProtocol() + "/" + pdfNode.getStoreRef().getIdentifier() + "/" + pdfNode.getId() + "/content/thumbnaildefinitions";
+            MockHttpServletResponse response = this.getRequest(url, 200);
+            
+            JSONArray array = new JSONArray(response.getContentAsString());
+            assertNotNull(array);
+            assertFalse(array.length() == 0);
+            boolean hasMedium = false;
+            boolean hasWebPreview = false;
+            for (int i = 0; i < array.length(); i++)
+            {
+                if (array.getString(i).equals("medium") == true)
+                {
+                    hasMedium = true;
+                }
+                else if (array.getString(i).equals("webpreview") == true)
+                {
+                    hasWebPreview = true;
+                }
+            }
+            assertTrue(hasMedium);
+            assertTrue(hasWebPreview);
+        }
+        
+        String url = "/api/node/" + jpgNode.getStoreRef().getProtocol() + "/" + jpgNode.getStoreRef().getIdentifier() + "/" + jpgNode.getId() + "/content/thumbnaildefinitions";
+        MockHttpServletResponse response = this.getRequest(url, 200);
+        
+        JSONArray array = new JSONArray(response.getContentAsString());
+        assertNotNull(array);
+        assertFalse(array.length() == 0);
+        boolean hasMedium = false;
+        boolean hasWebPreview = false;
+        for (int i = 0; i < array.length(); i++)
+        {
+            if (array.getString(i).equals("medium") == true)
+            {
+                hasMedium = true;
+            }
+            else if (array.getString(i).equals("webpreview") == true)
+            {
+                hasWebPreview = true;
+            }
+        }
+        assertTrue(hasMedium);
+        assertFalse(hasWebPreview);
+    }
+    
     public void testCreateAsyncThumbnail() throws Exception
     {
         // Check for pdfToSWF transformation before doing test
@@ -221,6 +272,4 @@ public class ThumbnailServiceTest extends BaseWebScriptTest
     {
         return "/api/node/" + nodeRef.getStoreRef().getProtocol() + "/" + nodeRef.getStoreRef().getIdentifier() + "/" + nodeRef.getId() + "/content/thumbnails";
     }
-    
-   
 }