diff --git a/README.md b/README.md
index ba06222..ef19c12 100644
--- a/README.md
+++ b/README.md
@@ -92,6 +92,13 @@ For example
 domains = friendica.example.com
 ```
 
+You can also add Mastodon instances you trust. In addition to the configuration
+needed for Friendica nodes you have to add the `type = mastodon` entry to the
+config section.
+
+Please note only suspended entries from the Mastodon blocklist will be added to
+the blocklist. Silenced entries will be ignored.
+
 ### Running the script
 
 You have to supply the file name of the configuration file on the command
diff --git a/src/brewserverblocklist/brewserverblocklist.py b/src/brewserverblocklist/brewserverblocklist.py
index aa79ffe..4e69d7f 100644
--- a/src/brewserverblocklist/brewserverblocklist.py
+++ b/src/brewserverblocklist/brewserverblocklist.py
@@ -37,9 +37,12 @@ class BrewBlocklist():
         for section in config.sections():
             section_values = dict(config.items(section))
             if not section == 'safe harbor':
+                if not 'type' in section_values.keys():
+                    section_values['type'] = 'friendica'
                 self.sources.append({
                     'url': section,
                     'trust': int(section_values['trust']),
+                    'type': section_values['type']
                 })
             else:
                 for item in section_values['domains'].split(','):
@@ -57,17 +60,27 @@ class BrewBlocklist():
         mention of the server wins) and sum the trust levels of the blocks.
         """
         for source in self.sources:
-            requ = requests.get('https://{}/blocklist/domain/download'.format(source['url']))
-            for line in requ.text.split('\n'):
-                try:
-                    pattern, reason = line.split(',')
-                except ValueError:
-                    # happens in an empty line in the source CSV file, which seems
-                    # to be the last line of the file so we can just break the loop
-                    # one step early and ignore the exception silently.
-                    break
-                self.blocklist[pattern] = self.blocklist.get(pattern, 0) + source['trust']
-                self.reasons[pattern] = self.reasons.get(pattern, reason)
+            if source['type'] == 'friendica':
+                # Friendica publishes the blocklist as CSV file
+                requ = requests.get('https://{}/blocklist/domain/download'.format(source['url']))
+                for line in requ.text.split('\n'):
+                    try:
+                        pattern, reason = line.split(',')
+                    except ValueError:
+                        # happens in an empty line in the source CSV file, which seems
+                        # to be the last line of the file so we can just break the loop
+                        # one step early and ignore the exception silently.
+                        break
+                    self.blocklist[pattern] = self.blocklist.get(pattern, 0) + source['trust']
+                    self.reasons[pattern] = self.reasons.get(pattern, reason)
+            elif source['type'] == 'mastodon':
+                # Mastodon has an API endpoint that contains the information
+                requ = requests.get('https://{}//api/v1/instance/domain_blocks'.format(source['url']))
+                for item in requ.json():
+                    self.blocklist[item['domain']] = self.blocklist.get(item['domain'], 0) + source['trust']
+                    self.reasons[item['domain']] = self.reasons.get(item['domain'], item['comment'])
+            else:
+                raise ValueError('{} is not a supported node type, check your config file'.format(source['type']))
 
     def clean_list(self):
         """