diff --git a/beetsplug/fetchart.py b/beetsplug/fetchart.py
index e4582e49e..85d5472aa 100644
--- a/beetsplug/fetchart.py
+++ b/beetsplug/fetchart.py
@@ -253,6 +253,17 @@ class ArtSource(RequestMixin):
         self._config = config
         self.match_by = match_by or self.VALID_MATCHING_CRITERIA
 
+    @staticmethod
+    def add_default_config(config):
+        pass
+
+    @classmethod
+    def available(cls, log, config):
+        """Return whether or not all dependencies are met and the art source is
+        in fact usable.
+        """
+        return True
+
     def get(self, album, plugin, paths):
         raise NotImplementedError()
 
@@ -465,6 +476,21 @@ class GoogleImages(RemoteArtSource):
         self.key = self._config['google_key'].get(),
         self.cx = self._config['google_engine'].get(),
 
+    @staticmethod
+    def add_default_config(config):
+        config.add({
+            'google_key': None,
+            'google_engine': '001442825323518660753:hrh5ch1gjzm',
+        })
+        config['google_key'].redact = True
+
+    @classmethod
+    def available(cls, log, config):
+        has_key = bool(config['google_key'].get())
+        if not has_key:
+            log.debug("google: Disabling art source due to missing key")
+        return has_key
+
     def get(self, album, plugin, paths):
         """Return art URL from google custom search engine
         given an album title and interpreter.
@@ -514,6 +540,13 @@ class FanartTV(RemoteArtSource):
         super().__init__(*args, **kwargs)
         self.client_key = self._config['fanarttv_key'].get()
 
+    @staticmethod
+    def add_default_config(config):
+        config.add({
+            'fanarttv_key': None,
+        })
+        config['fanarttv_key'].redact = True
+
     def get(self, album, plugin, paths):
         if not album.mb_releasegroupid:
             return
@@ -854,6 +887,20 @@ class LastFM(RemoteArtSource):
         super().__init__(*args, **kwargs)
         self.key = self._config['lastfm_key'].get(),
 
+    @staticmethod
+    def add_default_config(config):
+        config.add({
+            'lastfm_key': None,
+        })
+        config['lastfm_key'].redact = True
+
+    @classmethod
+    def available(cls, log, config):
+        has_key = bool(config['lastfm_key'].get())
+        if not has_key:
+            log.debug("lastfm: Disabling art source due to missing key")
+        return has_key
+
     def get(self, album, plugin, paths):
         if not album.mb_albumid:
             return
@@ -900,6 +947,14 @@ class Spotify(RemoteArtSource):
 
     SPOTIFY_ALBUM_URL = 'https://open.spotify.com/album/'
 
+    @classmethod
+    def available(cls, log, config):
+        if not HAS_BEAUTIFUL_SOUP:
+            log.debug('To use Spotify as an album art source, '
+                      'you must install the beautifulsoup4 module. See '
+                      'the documentation for further details.')
+        return HAS_BEAUTIFUL_SOUP
+
     def get(self, album, plugin, paths):
         if not len(album.mb_albumid) == 22:
             self._log.debug("Invalid Spotify album_id: {}", album.mb_albumid)
@@ -943,9 +998,6 @@ class CoverArtUrl(RemoteArtSource):
 
 # Try each source in turn.
 
-SOURCES_ALL = ['filesystem', 'coverart', 'itunes', 'amazon', 'albumart',
-               'spotify', 'wikipedia', 'google', 'fanarttv', 'lastfm', 'cover_art_url']
-
 ART_SOURCES = {
     'filesystem': FileSystem,
     'coverart': CoverArtArchive,
@@ -986,18 +1038,13 @@ class FetchArtPlugin(plugins.BeetsPlugin, RequestMixin):
             'cover_names': ['cover', 'front', 'art', 'album', 'folder'],
             'sources': ['filesystem', 'coverart', 'itunes', 'amazon',
                         'albumart', 'cover_art_url'],
-            'google_key': None,
-            'google_engine': '001442825323518660753:hrh5ch1gjzm',
-            'fanarttv_key': None,
-            'lastfm_key': None,
             'store_source': False,
             'high_resolution': False,
             'deinterlace': False,
             'cover_format': None,
         })
-        self.config['google_key'].redact = True
-        self.config['fanarttv_key'].redact = True
-        self.config['lastfm_key'].redact = True
+        for source in ART_SOURCES.values():
+            source.add_default_config(self.config)
 
         self.minwidth = self.config['minwidth'].get(int)
         self.maxwidth = self.config['maxwidth'].get(int)
@@ -1039,22 +1086,10 @@ class FetchArtPlugin(plugins.BeetsPlugin, RequestMixin):
             self.import_stages = [self.fetch_art]
             self.register_listener('import_task_files', self.assign_art)
 
-        available_sources = list(SOURCES_ALL)
-        if not self.config['google_key'].get() and \
-                'google' in available_sources:
-            available_sources.remove('google')
-        if not self.config['lastfm_key'].get() and \
-                'lastfm' in available_sources:
-            available_sources.remove('lastfm')
-        if not HAS_BEAUTIFUL_SOUP and \
-                'spotify' in available_sources:
-            self._log.debug('To use Spotify as an album art source, '
-                            'you must install the beautifulsoup4 module. See '
-                            'the documentation for further details.')
-            available_sources.remove('spotify')
-        available_sources = [(s, c)
-                             for s in available_sources
-                             for c in ART_SOURCES[s].VALID_MATCHING_CRITERIA]
+        available_sources = [(s_name, c)
+                             for (s_name, s_cls) in ART_SOURCES.items()
+                             if s_cls.available(self._log, self.config)
+                             for c in s_cls.VALID_MATCHING_CRITERIA]
         sources = plugins.sanitize_pairs(
             self.config['sources'].as_pairs(default_value='*'),
             available_sources)