JSON::RPC::Dispatcher can make any PSGI/Plack aware server a
JSON-RPC 2.0 server. This will allow you to expose your custom
functionality as a web service in a relatiely tiny amount of
code, as you can see above.

This module follows the draft specficiation for JSON-RPC 2.0.
More information can be found at:
http://groups.google.com/group/json-rpc/web/json-rpc-2-0.

WWW: http://search.cpan.org/dist/JSON-RPC-Dispatcher/