add_filter(
    'mastodon_api_generic_routes',
    function ( array $string_list ) {
        // Your code here
        return $string_list;
    }
);

apply_filters(
			'mastodon_api_generic_routes',
			array(
				'api/v1/accounts/relationships',
				'api/v1/accounts/verify_credentials',
				'api/v1/accounts/update_credentials',
				'api/v1/accounts/familiar_followers',
				'api/v1/accounts/search',
				'api/v1/accounts/lookup',
				'api/v1/announcements',
				'api/v1/apps',
				'api/v1/bookmarks',
				'api/v1/conversations',
				'api/v1/custom_emojis',
				'api/v1/favourites',
				'api/v1/filters',
				'api/v1/follow_requests',
// ...