diff --git a/docs/tutorial/PyMISP_tutorial.ipynb b/docs/tutorial/PyMISP_tutorial.ipynb
index 3cd1cf3..7e236fc 100644
--- a/docs/tutorial/PyMISP_tutorial.ipynb
+++ b/docs/tutorial/PyMISP_tutorial.ipynb
@@ -328,6 +328,40 @@
     "print('Event ID', event_id)\n",
     "print(response)"
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Direct call, no validation"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# The URL of the MISP instance to connect to\n",
+    "misp_url = 'http://127.0.0.1:8080/'\n",
+    "# Can be found in the MISP web interface under \n",
+    "# http://+MISP_URL+/users/view/me -> Authkey\n",
+    "misp_key = 'fk5BodCZw8owbscW8pQ4ykMASLeJ4NYhuAbshNjo'\n",
+    "# Should PyMISP verify the MISP certificate\n",
+    "misp_verifycert = False\n",
+    "\n",
+    "from pymisp import PyMISP\n",
+    "\n",
+    "misp = PyMISP(misp_url, misp_key, misp_verifycert)\n",
+    "misp.direct_call('attributes/add/2167', {'type': 'ip-dst', 'value': '8.8.8.8'})\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {
@@ -346,7 +380,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.5.3"
+   "version": "3.6.5"
   }
  },
  "nbformat": 4,
diff --git a/pymisp/api.py b/pymisp/api.py
index 45d0023..5e7544e 100644
--- a/pymisp/api.py
+++ b/pymisp/api.py
@@ -403,7 +403,8 @@ class PyMISP(object):
 
     def direct_call(self, url, data):
         '''Very lightweight call that posts a data blob (python dictionary) on the URL'''
-        response = self._prepare_request('POST', url, data)
+        url = urljoin(self.root_url, url)
+        response = self._prepare_request('POST', url, json.dumps(data))
         return self._check_response(response)
 
     # ##############################################