diff --git a/config/plugins/webhooks/demo/tour_generator/static/script.js b/config/plugins/webhooks/demo/tour_generator/static/script.js
index a7f2bd99e92..6171a2af550 100644
--- a/config/plugins/webhooks/demo/tour_generator/static/script.js
+++ b/config/plugins/webhooks/demo/tour_generator/static/script.js
@@ -9,21 +9,21 @@ $(document).ready(function() {
             // Add attribute 'tour_id' to the execution button
             $('#execute').attr('tour_id', 'execute');
 
-            var url = '/api/webhooks/tour_generator/get_data/' + JSON.stringify({
-                'tool_id': this.toolId
-            });
-
-            $.getJSON(url, function(obj) {
+            $.getJSON('/api/webhooks/tour_generator/get_data/', {
+                tool_id: this.toolId
+            })
+            .done(function(obj) {
                 if (obj.success) {
                     $('#history-refresh-button').click(); // Refresh history panel
 
-                    // Create a tour only when the uploaded dataset is ready
+                    // Add a delay because of the history panel refreshing
                     setTimeout(function() {
                         var dataset = Galaxy.currHistoryPanel.collection.where({
                             hid: obj.data.hid
                         })[0];
 
                         if (dataset) {
+                            // Create a tour only when the uploaded dataset is ready
                             dataset.on('change:state', function(model) {
                                 if (model.get('state') === 'ok') {
                                     me._main(obj.data);
diff --git a/lib/galaxy/webapps/galaxy/api/webhooks.py b/lib/galaxy/webapps/galaxy/api/webhooks.py
index 8d5ccbc6c00..1ec2e8e07d8 100644
--- a/lib/galaxy/webapps/galaxy/api/webhooks.py
+++ b/lib/galaxy/webapps/galaxy/api/webhooks.py
@@ -56,15 +56,16 @@ class WebhooksController(BaseAPIController):
         ]
 
     @expose_api_anonymous_and_sessionless
-    def get_data(self, trans, webhook_name, params, **kwd):
+    # def get_data(self, trans, webhook_name, params, **kwd):
+    def get_data(self, trans, webhook_name, **kwd):
         """
         *GET /api/webhooks/{webhook_name}/get_data/{params}
         Returns the result of executing helper function
         """
+        params = {}
 
-        # If params is not None, convert it into a dictionary
-        if params:
-            params = json.loads(params)
+        for key, value in kwd.items():
+            params[key] = value
 
         webhook = [
             webhook
diff --git a/lib/galaxy/webapps/galaxy/buildapp.py b/lib/galaxy/webapps/galaxy/buildapp.py
index 132ab82a8c9..946054c9a7b 100644
--- a/lib/galaxy/webapps/galaxy/buildapp.py
+++ b/lib/galaxy/webapps/galaxy/buildapp.py
@@ -598,13 +598,6 @@ def populate_api_routes( webapp, app ):
                            '/api/webhooks/{webhook_name}/get_data',
                            controller='webhooks',
                            action='get_data',
-                           params=None,
-                           conditions=dict( method=[ "GET" ] ) )
-
-    webapp.mapper.connect( 'get_data',
-                           '/api/webhooks/{webhook_name}/get_data/{params}',
-                           controller='webhooks',
-                           action='get_data',
                            conditions=dict( method=[ "GET" ] ) )
 
     # =======================