diff --git a/app/jobs/backtrace_job.rb b/app/jobs/backtrace_job.rb
index 559e0a1d..6f2425e9 100644
--- a/app/jobs/backtrace_job.rb
+++ b/app/jobs/backtrace_job.rb
@@ -4,11 +4,14 @@
 class BacktraceJob < ApplicationJob
   queue_as :low_priority
 
-  attr_reader :errors
+  attr_reader :errors, :site_id
 
   def perform(site_id:, errors:)
+    @site_id = site_id
     @errors = errors
 
+    return if files.empty?
+
     errors.each do |error|
       error['backtrace'].each do |backtrace|
         offset = SourceMap::Offset.new(backtrace['line'], backtrace['column'])
@@ -25,15 +28,19 @@ class BacktraceJob < ApplicationJob
     begin
       raise NoMethodError
     rescue NoMethodError => e
-      ExceptionNotifier.notify_exception(e, data: { errors: errors })
+      ExceptionNotifier.notify_exception(e, data: { site: site.name, errors: errors })
     end
   end
 
   private
 
+  def site
+    @site ||= Site.find(site_id)
+  end
+
   # Obtiene todos los archivos del backtrace
   def files
-    @files ||= errors.map { |x| x['backtrace'] }.flatten.map { |x| x['file'].split('@').last }.uniq
+    @files ||= errors.map { |x| x['backtrace'] }.flatten.map { |x| x['file'].split('@').last }.uniq.select { |x| x.start_with? site.url }
   end
 
   # Asume que todos los sourcemaps comparten la misma URL, lo
diff --git a/db/migrate/20201207152354_add_api_key_to_sites.rb b/db/migrate/20201207152354_add_api_key_to_sites.rb
new file mode 100644
index 00000000..0c1240fb
--- /dev/null
+++ b/db/migrate/20201207152354_add_api_key_to_sites.rb
@@ -0,0 +1,16 @@
+class AddApiKeyToSites < ActiveRecord::Migration[6.0]
+  def up
+    add_column :sites, :api_key_ciphertext, :string
+
+    begin
+      Site.find_each do |site|
+        site.update_attribute :api_key, SecureRandom.hex(64)
+      end
+    rescue Errno::ENOENT
+    end
+  end
+
+  def down
+    remove_column :sites, :api_key_ciphertext
+  end
+end