The Postgenomic API is REST based. It returns Atom feeds (the default) or JSON objects. Atom is a good choice for, say, integrating with Moveable Type (just use something like Feeds.App). JSON might be a better bet for more complicated mashups.
The base URL is:
http://www.postgenomic.com/api.php?type=<content type>
Where content type is blog, post etc. (see later sections)
If you’re interested in search results then you can use Postgenomic’s OpenSearch interface.
Some other variables that might come in handy:
format=< atom | json >
Format to return results in.
callback=<function name>
Callback if you want JSON.
limit=<how many results to return, max 100>
By default limit is set to 100.
start=<skip first x results>
By default start is set to 0.
category=<category to retrieve results from>
By default you will retrieve data from all categories.