Feditext beta users:
Feditext apparently works with the WordPress Mastodon API plugin now. while this is not a configuration we've tested ourselves, you don't even need to update Feditext to give it a go. if you try it, please report bugs at https://github.com/feditext/feditext/issues/394
you'll need v0.9.6 of the plugin: https://github.com/akirk/enable-mastodon-apps/issues/169