diff --git a/hc/api/admin.py b/hc/api/admin.py
index 37b9e7e1..cde781dc 100644
--- a/hc/api/admin.py
+++ b/hc/api/admin.py
@@ -27,7 +27,7 @@ class ChecksAdmin(admin.ModelAdmin):
          'all': ('css/admin/checks.css',)
         }
 
-    search_fields = ["name", "user__email"]
+    search_fields = ["name", "user__email", "code"]
     list_display = ("id", "name_tags", "created", "code", "status", "email",
                     "last_ping", "n_pings")
     list_select_related = ("user", )
diff --git a/hc/api/models.py b/hc/api/models.py
index 46a524af..bfab573a 100644
--- a/hc/api/models.py
+++ b/hc/api/models.py
@@ -92,7 +92,7 @@ class Check(models.Model):
             self.channel_set.add(*channels)
 
     def tags_list(self):
-        return self.tags.split(" ")
+        return [t.strip() for t in self.tags.split(" ") if t.strip()]
 
 
 class Ping(models.Model):
@@ -148,14 +148,9 @@ class Channel(models.Model):
 
             n.save()
         elif self.kind == "slack":
-            tmpl = "integrations/slack_message.html"
+            tmpl = "integrations/slack_message.json"
             text = render_to_string(tmpl, {"check": check})
-            payload = {
-                "text": text,
-                "username": "healthchecks.io",
-                "icon_url": "https://healthchecks.io/static/img/logo@2x.png"
-            }
-
+            payload = json.loads(text)
             r = requests.post(self.value, json=payload, timeout=5)
 
             n.status = r.status_code
diff --git a/hc/api/tests/test_check_model.py b/hc/api/tests/test_check_model.py
new file mode 100644
index 00000000..af940f6c
--- /dev/null
+++ b/hc/api/tests/test_check_model.py
@@ -0,0 +1,15 @@
+from django.test import TestCase
+
+from hc.api.models import Check
+
+
+class CheckModelTestCase(TestCase):
+
+    def test_it_strips_tags(self):
+        check = Check()
+
+        check.tags = " foo  bar "
+        self.assertEquals(check.tags_list(), ["foo", "bar"])
+
+        check.tags = " "
+        self.assertEquals(check.tags_list(), [])
diff --git a/hc/api/tests/test_notify.py b/hc/api/tests/test_notify.py
index c7ae3818..1b3b0484 100644
--- a/hc/api/tests/test_notify.py
+++ b/hc/api/tests/test_notify.py
@@ -61,3 +61,17 @@ class NotifyTestCase(BaseTestCase):
 
         args, kwargs = mock_post.call_args
         assert "trigger" in kwargs["data"]
+
+    @patch("hc.api.models.requests.post")
+    def test_slack(self, mock_post):
+        self._setup_data("slack", "123")
+        mock_post.return_value.status_code = 200
+
+        self.channel.notify(self.check)
+        assert Notification.objects.count() == 1
+
+        args, kwargs = mock_post.call_args
+        json = kwargs["json"]
+        attachment = json["attachments"][0]
+        fields = {f["title"]: f["value"] for f in attachment["fields"]}
+        self.assertEqual(fields["Last Ping"], "Never")
diff --git a/templates/integrations/slack_message.html b/templates/integrations/slack_message.html
deleted file mode 100644
index cfdd8afa..00000000
--- a/templates/integrations/slack_message.html
+++ /dev/null
@@ -1,8 +0,0 @@
-{% load humanize %}
-
-{% if check.status == "down" %}
-The check "{{ check.name_then_code }}" is DOWN.
-Last ping was {{ check.last_ping|naturaltime }}
-{% else %}
-The check "{{ check.name_then_code }}" received a ping and is now UP.
-{% endif %}
diff --git a/templates/integrations/slack_message.json b/templates/integrations/slack_message.json
new file mode 100644
index 00000000..86beea01
--- /dev/null
+++ b/templates/integrations/slack_message.json
@@ -0,0 +1,45 @@
+{% load hc_extras humanize %}
+{
+    "username": "healthchecks.io",
+    "icon_url": "https://healthchecks.io/static/img/logo@2x.png",
+    "attachments": [{
+        {% if check.status == "up" %}
+            "color": "good",
+        {% else %}
+            "color": "danger",
+        {% endif %}
+
+        "fallback": "The check \"{{ check.name_then_code|escapejs }}\" is {{ check.status|upper }}.",
+        "mrkdwn_in": ["fields"],
+        "text": "“{{ check.name_then_code|escapejs }}” is {{ check.status|upper }}.",
+        "fields": [
+            {
+                "title": "Period",
+                "value": "{{ check.timeout|hc_duration }}",
+                "short": true
+            },
+            {
+                "title": "Last Ping",
+                {% if check.last_ping %}
+                    "value": "{{ check.last_ping|naturaltime }}",
+                {% else %}
+                    "value": "Never",
+                {% endif %}
+                "short": true
+            },
+            {% if check.tags_list %}
+            {
+                "title": "Tags",
+                "value": "{% for tag in check.tags_list %}`{{ tag|escapejs }}` {% endfor %}",
+                "short": true
+            },
+            {% endif %}
+            {
+                "title": "Total Pings",
+                "value": {{ check.n_pings }},
+                "short": true
+            }
+        ]
+    }]
+}
+