Should be able to get it via JSON - this is how I did it:
URL should look like this:
https://trello.com/b/BaDyGlxp/<name of board>.json
You'll also find the list IDs in there under idList
I dropped ".json" at the end of address in firefox and a pretty nice looking json display was rendered and the first item was "id", which worked for me.
I filtered "idBoard" and the only result was a "idBoardSouce" which was null. Maybe the "idBoard" has since changed to "id".
@Chris topher boards have 2 types of ID, the short ID which is in the URL as shown here:
and the long ID which you need to get using the API. You can actually get it using the API explorer and the short ID:
... oh wait, no you can't. @bentley the developers.atlassian site doesn't have the ability to try API commands in the browser, that's pretty lame any ETA on adding it?
Anyway here's the end point, you can pass the short ID into the API endpoint and get the long ID in return:
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