This document contains information on the XML-RPC interface that Nucleus provides, and the error messages it spits out. Please note that the specification of this interface might still undergo changes in the future.

The URL for the Nucleus XML-RPC interface is:
http://www.yourserver.com/yourpath/nucleus/xmlrpc/server.php

Nucleus implements the Blogger API. This allows for tools and services that can communicate with Blogger, to be able to also communicate with Nucleus. Because the way Nucleus works, some interpretations of parameters are slightly different, see the notes below for more info. The structure of method calls and responses are, of course, exactly the same as the methods at Blogger.

Here's the list of available methods. Click them to get more information (links go to either the Blogger API or the Blogger API Mailinglist).

• blogger.newPost
• blogger.editPost
• blogger.getPost
• blogger.deletePost
• blogger.getUsersBlogs
• blogger.getRecentPosts
• blogger.getUserInfo
• blogger.getTemplate
• blogger.setTemplate

Since Nucleus is structured somewhat differently inside, there are some differences in the way parameters are handled. An overview:

• Appkeys are ignored.
• Next to the body of a post, a Nucleus-item also has a title and a category. Blogger only has the body (known as 'contents'). To be able to use the extra parts, you can use <title> and <category> in the contents you send to Nucleus. These tags are only added in the getRecentPosts call
• What is known under Blogger as 'templates', is known under Nucleus as 'skins'. There can be more than one skin on the system, and each skin can be used by different blogs. The blogger.setTemplate and blogger.getTemplate methods will affect the default skin for the chosen blog, as selected in the Nucleus blog settings. The 'main' and 'archiveIndex' template types refer to the nucleus skinparts 'index' and 'archivelist'
• The publish parameter is used to determine wether a new post is to be added as a draft or not. When using blogger.editPost, the publish parameter is ignored unless it turns a draft into a published item
• When using the getUserInfo call, the 'lastname' in the result will be empty and 'firstname' will contain the full name. This is because Nucleus does not make a difference between first name and last name
• The getRecentPostst-method returns authorName and title as extra parameters. Blogger has been returning these also (although undocumented)

Since v1.1, Nucleus also supports the metaWeblog API, which is an extention to the Blogger API.

In Nucleus v2.5, support was added for the newMediaObject and getRecentPosts methods as well (they weren't in the original metaWeblog specification)

A list of available methods is listed below (see the specification for more info):

• metaWeblog.newPost
• metaWeblog.editPost
• metaWeblog.getPost
• metaWeblog.getCategories
• metaWeblog.newMediaObject (v2.5)
• metaWeblog.getRecentPosts (v2.5)

As of Nucleus v3.22 we also support the mt_text_more and mt_allow_comments extensions to the metaWeblog API. This means that if you use an application that also supports these extensions, such as Ecto, you can also edit the extended body and determine whether or not you want to allow comments for an item.

Since v2.5, Nucleus supports the methods from the Movable Type API.

The list of available methods is listed below:

• mt.supportedMethods
• mt.supportedTextFilters
• mt.publishPost
• mt.getCategoryList
• mt.getPostCategories
• mt.setPostCategories
• mt.getRecentPostTitles
• mt.getTrackbackPings

Some notes:

• Nucleus only supports one category for each item. This means that all categories except the 'primary' category for an item will be ignored.
• Trackback is not implemented in the Nucleus core (it's avalailable as a plugin instead). Because of this, mt.getTrackbackPings will return an empty array by default.
• Nucleus doesn't have text filters, so mt.getSupportedTextFilters returns an empty array.

Below is an overview of the types of errors you can get back from the methods: