diff --git a/toot/api.py b/toot/api.py
index 478949e..f3c3a21 100644
--- a/toot/api.py
+++ b/toot/api.py
@@ -4,7 +4,7 @@ import uuid
 from urllib.parse import urlparse, urlencode, quote
 
 from toot import http, CLIENT_NAME, CLIENT_WEBSITE
-from toot.exceptions import AuthenticationError
+from toot.exceptions import AuthenticationError, ApiError
 from toot.utils import str_bool
 
 SCOPES = 'read write follow'
@@ -27,6 +27,23 @@ def _tag_action(app, user, tag_name, action):
 
     return http.post(app, user, url).json()
 
+def _status_toggle_action(app, user, status_id, action, data=None):
+    url = '/api/v1/statuses/{}/{}'.format(status_id, action)
+
+    try:
+        response = http.post(app, user, url, data=data).json()
+    except ApiError as e:
+        # For "toggle" operations, Mastodon returns unhelpful
+        # 422: "Validation failed:"
+        # responses when you try to bookmark a status already
+        # bookmarked, or favourite a status already favourited
+        # so we just swallow those errors here
+        if str(e).startswith("Validation failed:"):
+            return None # FIXME: return mock OK Response object?
+        else:
+            # not the error we expected; re-raise the exception
+            raise e
+    return response
 
 def create_app(domain, scheme='https'):
     url = '{}://{}/api/v1/apps'.format(scheme, domain)
@@ -184,38 +201,40 @@ def delete_status(app, user, status_id):
 
 
 def favourite(app, user, status_id):
-    return _status_action(app, user, status_id, 'favourite')
+    return _status_toggle_action(app, user, status_id, 'favourite')
 
 
 def unfavourite(app, user, status_id):
-    return _status_action(app, user, status_id, 'unfavourite')
+    return _status_toggle_action(app, user, status_id, 'unfavourite')
 
 
 def reblog(app, user, status_id, visibility="public"):
-    return _status_action(app, user, status_id, 'reblog', data={"visibility": visibility})
+    return _status_toggle_action(app, user, status_id, 'reblog', data={"visibility": visibility})
 
 
 def unreblog(app, user, status_id):
-    return _status_action(app, user, status_id, 'unreblog')
+    return _status_toggle_action(app, user, status_id, 'unreblog')
 
 
 def pin(app, user, status_id):
-    return _status_action(app, user, status_id, 'pin')
+    return _status_toggle_action(app, user, status_id, 'pin')
 
 
 def unpin(app, user, status_id):
-    return _status_action(app, user, status_id, 'unpin')
+    return _status_toggle_action(app, user, status_id, 'unpin')
 
 
 def bookmark(app, user, status_id):
-    return _status_action(app, user, status_id, 'bookmark')
+    return _status_toggle_action(app, user, status_id, 'bookmark')
 
 
 def unbookmark(app, user, status_id):
-    return _status_action(app, user, status_id, 'unbookmark')
+    return _status_toggle_action(app, user, status_id, 'unbookmark')
 
 
 def translate(app, user, status_id):
+    # don't use status_toggle_action for translate as this is
+    # not toggling anything server-side; it's a read only operation.
     return _status_action(app, user, status_id, 'translate')