ECA Use Case

Yes, you could use an Action Link to trigger an ECA, that's exactly the sort of thing it's for.

How to?

> It would be more straightforward to directly fire an ECA custom event from the action link, so we can specifically react to that in an ECA model, without writing to & reading from the database... Would that be possible?

Yes, that's what I meant. Sorry, I know very little about how ECA works.

You'd probably want a State Action plugin which lets you choose which ECA event to fire.

I've played around trying to do the above but it's a little bit beyond me... this would be a really useful example/template if anyone is up to it.

I ended up just creating an html button that links to a an ECA Endpoint Response Event url. Works great, no need for other modules.