renanivo

Adds some Multisite-specific functions to WordPress’ XML-RPC interface (http://yourdomain.com/xmlrpc.php).
Using this plugin, you can create a blog, update the archived status and get a blog ID using a remote software (another server, a desktop software, a mobile software…)
The functions enabled by this plugin are:
<ul>
<li>Create Blog (ms.CreateBlog)</li>
<li>Get Blog Id (ms.GetBlogId)</li>
<li>Update Archived (ms.UpdateArchived)</li>
</ul>
refer to the <a href="http://wiki.github.com/renanivo/WP-Multisite-XML-RPC/" rel="nofollow ugc">wiki</a> for further documentation

Multisite XML-RPC

Adds some Multisite-specific functions to WordPress' XML-RPC interface.

brainvireinfo

You can now disable XML-RPC to avoid Brute force attack for given IPs or can even enable access for some IPs. XML-RPC on WordPress is actually an API that gives developers who build mobile apps, desktop apps and other services, the ability to talk to a WordPress site. The XML-RPC API that WordPress provides gives developers, a way to write applications (for you) that can do many of the things that you can do when logged into WordPress via the web interface.
<h4>Features</h4>
Block XML-RPC by following way.
<ul>
<li>Disable pingback.ping, pingback.extensions.getPingbacks and Unset X-Pingback from HTTP headers, that will block bots to access specified method.</li>
<li>Disable/Block XML-RPC for all users.</li>
</ul>

Manage XML-RPC

Enable/Disable XML-RPC for all or based on IP list, also you can control pingback and Unset X-Pingback from HTTP headers.

Multisite XML-RPC vs Manage XML-RPC