For sending small amounts of data, remember that you can email or message someone a url with a FM Go file, plus script to run and parameters that are variables. So the parameters could be the details of the job, and it's calling a script in a local FM Go file to create the new job. If there's more details than makes sense in a url, then have the url only contain enough information to start the script that imports from a server all of the remaining details.
Nick, thanks very much. Now I have realised that Go has an equivalent of File, Open, Remote, across a WAN, using a public IP address, just like with a FileMaker Pro client, I think I can work that way, to collect a new job.
Many thanks for your reply.