Install
This is the repository archive. It installs, but the folder name will carry the branch suffix and updates will not flow.
Install straight from GitLab with WP-CLI:
wp plugin install https://gitlab.com/spielhoelle/wp-plugin-mailchimp-ajax-subscribe/-/archive/master/wp-plugin-mailchimp-ajax-subscribe-master.zipNo built-in updater. New versions won't appear under Dashboard → Updates. Install new releases yourself, or let Git Updater track the repository.
activate plugin
add [newsletter-form] where you want the form to be displayed
enter ApiKey and ListID in
Archive functionality:
add [newsletter-link] to display a link to the newsletter create "page-newsletter.php" and add custom loop for newsletters (example file in plugin folder) optional create "content-newsletter.php" for the content of each