diff --git a/lib/micropub/webserver.rb b/lib/micropub/webserver.rb
index 9c76416..91b32f7 100644
--- a/lib/micropub/webserver.rb
+++ b/lib/micropub/webserver.rb
@@ -56,6 +56,7 @@ module Micropub
       token = Indieauth::Token.new(endpoints.token_endpoint)
 
       auth_type, auth_token = request.env["HTTP_AUTHORIZATION"]&.split(" ")
+      auth_token ||= params["access_token"]
 
       auth_type == "Bearer" && token.validate(auth_token)
     end