diff --git a/certbot-dns-cloudxns/certbot_dns_cloudxns/__init__.py b/certbot-dns-cloudxns/certbot_dns_cloudxns/__init__.py
index 8df02d0fa..7260612cd 100644
--- a/certbot-dns-cloudxns/certbot_dns_cloudxns/__init__.py
+++ b/certbot-dns-cloudxns/certbot_dns_cloudxns/__init__.py
@@ -1 +1,77 @@
-"""CloudXNS DNS Authenticator"""
+"""
+The `~certbot_dns_cloudxns.dns_cloudxns` plugin automates the process of
+completing a ``dns-01`` challenge (`~acme.challenges.DNS01`) by creating, and
+subsequently removing, TXT records using the CloudXNS API.
+
+
+Named Arguments
+---------------
+
+========================================  =====================================
+``--dns-cloudxns-credentials`  `          CloudXNS credentials_ INI file.
+                                          (Required)
+``--dns-cloudxns-propagation-seconds``    The number of seconds to wait for DNS
+                                          to propagate before asking the ACME
+                                          server to verify the DNS record.
+                                          (Default: 30)
+========================================  =====================================
+
+Credentials
+-----------
+
+Use of this plugin requires a configuration file containing CloudXNS API
+credentials, obtained from your CloudXNS
+`API page <https://www.cloudxns.net/en/AccountManage/apimanage.html>`_.
+
+.. code-block:: ini
+   :name: credentials.ini
+   :caption: Example credentials file:
+
+   # CloudXNS API credentials used by Certbot
+   dns_cloudxns_api_key = 1234567890abcdef1234567890abcdef
+   dns_cloudxns_secret_key = 1122334455667788
+
+The path to this file can be provided interactively or using the
+``--dns-cloudxns-credentials`` command-line argument. Certbot records the path
+to this file for use during renewal, but does not store the file's contents.
+
+.. caution::
+   You should protect these API credentials as you would the password to your
+   CloudXNS account. Users who can read this file can use these credentials to
+   issue arbitrary API calls on your behalf. Users who can cause Certbot to run
+   using these credentials can complete a ``dns-01`` challenge to acquire new
+   certificates or revoke existing certificates for associated domains, even if
+   those domains aren't being managed by this server.
+
+Examples
+--------
+
+.. code-block:: bash
+   :caption: To acquire a certificate for ``example.com``
+
+   certbot certonly \\
+     --dns-cloudxns \\
+     --dns-cloudxns-credentials ~/.secrets/certbot/cloudxns.ini \\
+     -d example.com
+
+.. code-block:: bash
+   :caption: To acquire a single certificate for both ``example.com`` and
+             ``www.example.com``
+
+   certbot certonly \\
+     --dns-cloudxns \\
+     --dns-cloudxns-credentials ~/.secrets/certbot/cloudxns.ini \\
+     -d example.com \\
+     -d www.example.com
+
+.. code-block:: bash
+   :caption: To acquire a certificate for ``example.com``, waiting 60 seconds
+             for DNS propagation
+
+   certbot certonly \\
+     --dns-cloudxns \\
+     --dns-cloudxns-credentials ~/.secrets/certbot/cloudxns.ini \\
+     --dns-cloudxns-propagation-seconds 60 \\
+     -d example.com
+
+"""