I suspect it'd work if you have your SSP worlds open to LAN, though since it's SSP, would it not be easier to use NEI to just get the resources you're after?Because I don't think anyone saw my question earlier, can I send items from one ssp save to another using endernet?
EDIT: just checked the official thread and this question is actually covered explicitly. In response to "does this work in SSP?":
Yes. It works within one server as well. You can also communicate over LAN, or even between two Minecraft instances on one computer (as long as the HTTP server ports are different - see endernet.cfg)