diff --git a/activitypub.php b/activitypub.php
index 521a379..86fd4a3 100644
--- a/activitypub.php
+++ b/activitypub.php
@@ -15,6 +15,8 @@
 
 namespace Activitypub;
 
+use WP_CLI;
+
 use function Activitypub\is_blog_public;
 use function Activitypub\site_supports_blocks;
 
@@ -213,3 +215,9 @@ function get_plugin_version() {
 
 	return $meta['Version'];
 }
+
+// Check for CLI env, to add the CLI commands
+if ( defined( 'WP_CLI' ) && WP_CLI ) {
+	require_once __DIR__ . '/includes/class-cli.php';
+	WP_CLI::add_command( 'activitypub', __NAMESPACE__ . '\Cli' );
+}
diff --git a/includes/class-cli.php b/includes/class-cli.php
new file mode 100644
index 0000000..9e4be4b
--- /dev/null
+++ b/includes/class-cli.php
@@ -0,0 +1,74 @@
+<?php
+namespace Activitypub;
+
+use WP_CLI;
+use WP_CLI_Command;
+use Activitypub\Collection\Users;
+use Activitypub\Activity\Activity;
+use Activitypub\Collection\Followers;
+
+/**
+ * The ActivityPub CLI
+ */
+class Cli extends WP_CLI_Command {
+
+	/**
+	 * Re-Send Accept Activity as response to a Follow
+	 *
+	 * ## OPTIONS
+	 *
+	 * [--follower=<url>]
+	 * : The Follower ID, this is generally a URL
+	 *
+	 * [--user_id=<id>]
+	 * : The ActivityPub User ID
+	 *
+	 * ## EXAMPLES
+	 *
+	 *     # Re-Send Accept Activity as response to a Follow
+	 *     $ wp activitypub accept --follower=https://mastodon.social/@pfefferle --user=1
+	 */
+	public function accept( $args, $assoc_args ) {
+		$user_id = (int) $assoc_args['user_id'];
+		$user    = Users::get_by_id( $user_id );
+
+		if ( ! $user ) {
+			WP_CLI::error( __( 'User is not allow to send Activities', 'activitypub' ) );
+		}
+
+		$follower = esc_url( $assoc_args['follower'] );
+		$follower = Followers::get_follower( $user->get__id(), $follower );
+
+		if ( ! $follower ) {
+			WP_CLI::error( __( 'Unknown Follower', 'activitypub' ) );
+		}
+
+		// get inbox
+		$inbox = $follower->get_shared_inbox();
+
+		$object = array(
+			'id'     => $follower->get_id(),
+			'type'   => 'Follow',
+			'actor'  => $follower->get_id(),
+			'object' => $user->get_id(),
+		);
+
+		// send "Accept" activity
+		$activity = new Activity();
+		$activity->set_type( 'Accept' );
+		$activity->set_object( $object );
+		$activity->set_actor( $user->get_id() );
+		$activity->set_to( $follower->get_id() );
+		$activity->set_id( $user->get_id() . '#follow-' . \preg_replace( '~^https?://~', '', $follower->get_id() ) . '-' . \time() );
+
+		$activity = $activity->to_json();
+
+		$response = Http::post( $inbox, $activity, $user_id );
+
+		if ( is_wp_error( $response ) ) {
+			WP_CLI::error( $response->get_error_message() );
+		} else {
+			WP_CLI::success( __( 'Activity sent', 'activitypub' ) );
+		}
+	}
+}