more details and japanese document are here.

How to Register Graphs

To create graphs or update data, make a request to the following URL via a POST method.

<%= url_for '/', :full %>api/:service_name/:section_name/:graph_name

The names of the items within the URL to POST to are shown in the table to the right.

You can use multi-byte strings for each item name as long as it is UTF-8.

The Name Used in the Example	Purpose	Actual Parameters
:service_name	The name of the service that you'd like to graph	blog, photo, place, socialgame
:section_name	The name of the feature or system to graph, within said service.	entry, user, spot, items
:graph_name	The actual name of the value being graphed	total_entry, kakin_user, muryo_user

For example, if we are graphing the number of registered users in a social game, we would POST to the following URL:

<%= url_for '/', :full %>api/socialgame/member/register

Also, we would use the following parametens when POSTing.

Parameter	Description	Required/Optional
number	The number to give the graph	Required
mode	Update method for the number: count, modified, gauge。 count Add the number and update modified Overwritten only when the numbers different from the previous gauge Always overwritten by the number derive Always overwritten by the number. To Display figures in per seconds Default is "gauge" ⚠ The data type is determined at first time. Can't change mode from DERIVE to other and other to DERIVE.	Optional
color	The color of the grah. Specify with #FFFFFF format.	Optional (auto-generated if unspecified in a new graph)
description	short description of this Graph	Option

Example: Creating a New Graph

The example below shows how to create a new graph or update an existing one, using Perl's LWP module.

my $ua = LWP::UserAgent->new;
$ua->post('<%= url_for '/', :full %>api/socialgame/member/register', {
    number      => 10,
    color       => '#333399'
});

If using curl:

$ curl -F number=10 <%= url_for '/', :full %>api/socialgame/member/register