"json_rpc" is a complete implementation of the JSON-RPC 1.1 protocol,
as described in
the JSON-RPC 1.1 Specification draft, which may be found at
JSON-RPC 1.1 is a fast and lightweight text-based protocol based on
HTTP. The plugin automatically chooses between GET and POST requests
based on the idempotency of the remote procedures using the
introspective features of JSON-RPC 1.1.
The json_rpc plgin allows a Rails application to choose to act as a
as a client, or both. The plugin allows an application to set up an
unlimited number of API services.
More information on
script/plugin install svn://rubyforge.org/var/svn/json-rpc