This service accepts posts of Graph plugin assembled by the Transport plugin's GRAPH source modifier. It runs Graphviz's dot layout engine and returns an svg image wrapped in the Html plugin.
Graph(s) ⇒ Transport ⇒ here ⇒ Html <img>
Recent graphs are saved in the Graphviz Gallery.
GRAPH POST https://image-transporter.wiki.dbbs.co/graphviz
As of this writing modifications to various plugins may not be widely distributed. One may need to build from source.
We desire to describe and manipulate graphs within wiki for purposes other than exploring wiki itself. github 
wiki-plugin-graph
.