diff --git a/webarchiv.py b/webarchiv.py
index 4b355e6752469ed9362baf17d0ad7aaef0864c3d..36ca857e846f617ebd65d80a103a6d9291bc0b7f 100644
--- a/webarchiv.py
+++ b/webarchiv.py
@@ -141,6 +141,29 @@ class WebarchivSession:
         else:
             return self._handle_response_errors(r)
 
+    def _post(self, op, jsondata, auto_connect=True):
+        r = requests.post(self.base_url.format(op), jsondata,
+                          headers={
+                              'content-type': 'application/json',
+                              'accept': 'application/ld+json'
+                          })
+        if r.ok:
+            return r
+        else:
+            if r.status_code == 403:
+                if auto_connect:
+                    self.connect()
+                    return self._post(op=op, jsondata=jsondata, auto_connect=False)
+                else:
+                    print('Forbidden. Invalid Token or ApiKey transmitted', file=sys.stderr)
+                    return r
+            elif r.status_code == 400:
+                print('Bad request', file=sys.stderr)
+                return r
+            elif r.status_code == 410:
+                print('The requested API Version (via X-API-VERSION Header) is not available', file=sys.stderr)
+            return r
+
     def fulltext_search(self, query_string, from_=None, to_=None):
         """
         Start a fulltext search query in the Webarchive.
@@ -266,6 +289,8 @@ class WebarchivSession:
             r = self._get(op='/search/status/fulltext', params={'requestid': requestid})
         elif type_ == 2:
             r = self._get(op='/search/status/wayback', params={'requestid': requestid})
+        elif type_ == 5:
+            r = self._get(op='/fragment/checksum/status', params={'requestid': requestid})
         else:
             raise NotImplementedError(f'Unknown status query type {type_} - Please update client.')
 
@@ -348,3 +373,59 @@ class WebarchivSession:
                           }
                           )
         return r
+
+    def fragmentChecksumHtml(self, seed, capture, selector, occurrence):
+        try:
+            response = self._post(op='/fragment/checksum/html', jsondata='''{{
+                              "apikey": "{api_key}",
+                              "t": "{token}",
+                              "seed": "{seed}",
+                              "capture": "{capture}",
+                              "selector": "{selector}",
+                              "occurrence": "{occurrence}",
+                              "extractortype": 2
+
+                          }}'''.format(api_key=self.api_key, token=self.token, seed=seed, capture=capture,
+                                       selector=selector, occurrence=occurrence))
+            response = self.status_query(response)
+            return self.waitForResponse(response)
+        except HTTPError as e:
+            self._display_http_error(e)
+
+
+if __name__ == '__main__':
+    # noinspection SpellCheckingInspection
+    w = WebarchivSession('2pm8i0hnmpcTK4Oj4CUeBoZd7vywrm4c')
+#    response = w.wayback_search("http://www.onb.ac.at")
+#    response = w.wayback_search("http://frauenhetz.jetzt")
+    url = "http://sport.orf.at/l/stories/2003717/"
+    response = w.wayback_search("http://sport.orf.at/l/stories/2003717/", "20110101000000", "20120401000000")
+#    response = w.wayback_search("x")
+
+    if response.status_code != 200:
+        print("Error ", response.status_code)
+        exit(1)
+
+    print(response.json()['total'])
+
+    print(url)
+
+    lastchecksum = ''
+    for capture in response.json()['hits']:
+        capturedate = capture['c']
+
+        resp = w.fragmentChecksumHtml(url, capturedate, ".odd td", 3);
+        checksum = resp.json()['checksum']
+        returncode = resp.json()['returncode']
+
+        if returncode == 2:
+            continue
+
+        if checksum != lastchecksum:
+            print(resp.json())
+            print("http://wayback/web/" + capturedate + "/" + url)
+            print(capturedate + " " + checksum)
+
+        lastchecksum = checksum
+
+    print("end")