node-jsonrpc

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This is a JSON-RPC server and client library for node.js http://nodejs.org/, the V8 based evented IO framework.

Firing up an efficient JSON-RPC server becomes extremely simple:

var rpc = require('jsonrpc');

function add(first, second) {
    return first + second;
}
rpc.expose('add', add);

rpc.listen(8000, 'localhost');

And creating a client to speak to that server is easy too:

var rpc = require('jsonrpc');
var sys = require('sys');

var client = rpc.getClient(8000, 'localhost');

client.call('add', [1, 2], function(result) {
    sys.puts('1 + 2 = ' + result);
});

To learn more, see the examples directory, peruse test/jsonrpc-test.js, or simply "Use The Source, Luke".

More documentation and development is on its way.