Sorry, posts are currently only viewable by requesting a topic/page combination. Did you need a way of accessing a post via its BitcoinTalk message id (like when you link to an individual post)? Or would any id do?
Any ID would do.
I want new posts displayed in RSS feed style.
So my script will remember the total amount of posts in a thread. Then when the total changes, the script fetches the last post.
Actually, as I was writing this, I realised that I can achieve this by taking the page and calculating the amount of posts I want to discard by matching the amount of {} pairs. Then I can proceed to fetch the posts I need.
Have you got any tool ready for the end-user?
Ideally I want a tool that integrates with Thunderbird. In such case my script parses your API then converts new posts to RSS and acts as a local RSS server which sends new posts to TB.