WordPress provides users with an option to remotely publish posts using external tools or devices like Windows Live Writer. However, for security XML RPC was automatically disabled in newer versions of WordPress.
If you see an error like XML-RPC services are disabled on this blogor Blog Server Error – Server Error 405 Occurred. It means that XML RPC is disabled on your blog.
To enable Remote publishing or XML RPC publishing on your blog, follow the steps given below.
Step 1: Login to your WordPress Admin Dashboard.
Step 2: Expand Settings and Click on Writing.
Step 3: Scroll down till you see Remote publishing and select the checkbox next to Enable the WordPress, Movable Type, MetaWeblog and Blogger XML-RPC publishing protocols. You might also want to enable the Atom Publishing Protocol
Step 4: Click on Save Changes and try again, you should now be able to publish posts remotely to your WordPress blog.