I haven't seen the Apache web server mentioned for some reason. I haven't used Apache but on the previous Domino-based web server you could write a Rexx CGI (Common Gateway Interface, not Computer Generated Images) program that could be invoked via URL and retrieve whatever you want. When I fooled with it I chose to return XML but you can return whatever the client program needs I am sure. I don't know if Apache still support CGI but it definitely supports _some_ way to invoke an application program via the web. The Apache server is "free" with z/OS, too, I believe.
Disclaimer: I am retired and consult part-time, so if some z/OS 2.3 thing has changed circumstances I might not be completely up to date. Hopefully to be remedied at a future SHARE someday. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN