diff --git a/app/api/processingnodes.py b/app/api/processingnodes.py
index ed4fe6d7..af1975ae 100644
--- a/app/api/processingnodes.py
+++ b/app/api/processingnodes.py
@@ -10,6 +10,11 @@ from nodeodm.models import ProcessingNode
 
 
 class ProcessingNodeSerializer(serializers.ModelSerializer):
+    online = serializers.SerializerMethodField()
+
+    def get_online(self, obj):
+        return obj.is_online()
+
     class Meta:
         model = ProcessingNode
         fields = '__all__'
diff --git a/app/static/app/js/components/EditTaskForm.jsx b/app/static/app/js/components/EditTaskForm.jsx
index 89a33c19..198c8320 100644
--- a/app/static/app/js/components/EditTaskForm.jsx
+++ b/app/static/app/js/components/EditTaskForm.jsx
@@ -76,16 +76,13 @@ class EditTaskForm extends React.Component {
           let now = new Date();
 
           let nodes = json.map(node => {
-            let last_refreshed = new Date(node.last_refreshed);
-            let enabled = (now - last_refreshed) < 1000 * 60 * 5; // 5 minutes
-
             return {
               id: node.id,
               key: node.id,
               label: `${node.hostname}:${node.port} (queue: ${node.queue_count})`,
               options: node.available_options,
               queue_count: node.queue_count,
-              enabled: enabled,
+              enabled: node.online,
               url: `http://${node.hostname}:${node.port}`
             };
           });
diff --git a/app/tests/test_api.py b/app/tests/test_api.py
index e4f7ada2..c2ce9b09 100644
--- a/app/tests/test_api.py
+++ b/app/tests/test_api.py
@@ -321,6 +321,11 @@ class TestApi(BootTestCase):
         self.assertEqual(res.status_code, status.HTTP_200_OK)
         self.assertTrue(res.data["hostname"] == "localhost")
 
+        # Verify online field exists
+        self.assertTrue("online" in res.data)
+
+        # Should be set to false
+        self.assertFalse(res.data['online'])
 
         # Cannot delete a processing node as normal user
         res = client.delete('/api/processingnodes/{}/'.format(pnode.id))
diff --git a/slate/source/includes/reference/_processingnode.md b/slate/source/includes/reference/_processingnode.md
index fd22527d..29bbbdab 100644
--- a/slate/source/includes/reference/_processingnode.md
+++ b/slate/source/includes/reference/_processingnode.md
@@ -5,6 +5,7 @@
 ```json
 {
     "id": 2,
+    "online": true,
     "hostname": "nodeodm.masseranolabs.com",
     "port": 80,
     "api_version": "1.0.1",
@@ -27,6 +28,7 @@ take care of processing input images. Processing nodes are computers or virtual
 Field | Type | Description
 ----- | ---- | -----------
 id | int | Unique Identifier
+online | bool | Whether the processing node could be reached in the last 5 minutes
 hostname | string | Hostname/IP address
 port | int | Port
 api_version | string | Version of node-OpenDroneMap currently running