diff --git a/httprpc.js b/httprpc.js
new file mode 100644
index 0000000000..085b4693d4
--- /dev/null
+++ b/httprpc.js
@@ -0,0 +1,70 @@
+(function () {
+ var HttpRpcProvider = function (host) {
+ this.handlers = [];
+ this.host = host;
+ };
+
+ function formatJsonRpcObject(object) {
+ return {
+ jsonrpc: '2.0',
+ method: object.call,
+ params: object.args,
+ id: object._id
+ }
+ };
+
+ function formatJsonRpcMessage(message) {
+ var object = JSON.parse(message);
+
+ return {
+ _id: object.id,
+ data: object.result
+ };
+ };
+
+ HttpRpcProvider.prototype.sendRequest = function (payload, cb) {
+ var data = formatJsonRpcObject(payload);
+
+ var request = new XMLHttpRequest();
+ request.open("POST", this.host, true);
+ request.send(JSON.stringify(data));
+ request.onreadystatechange = function () {
+ if (request.readyState === 4 && cb) {
+ cb(request);
+ }
+ }
+ };
+
+ HttpRpcProvider.prototype.send = function (payload) {
+ var self = this;
+ this.sendRequest(payload, function (request) {
+ self.handlers.forEach(function (handler) {
+ handler.call(self, formatJsonRpcMessage(request.responseText));
+ });
+ });
+ };
+
+ HttpRpcProvider.prototype.poll = function (payload, id) {
+ var self = this;
+ this.sendRequest(payload, function (request) {
+ var parsed = JSON.parse(request.responseText);
+ if (parsed.result instanceof Array ? parsed.result.length === 0 : !parsed.result) {
+ return;
+ }
+ self.handlers.forEach(function (handler) {
+ handler.call(self, {_event: payload.call, _id: id, data: parsed.result});
+ });
+ });
+ };
+
+ Object.defineProperty(HttpRpcProvider.prototype, "onmessage", {
+ set: function (handler) {
+ this.handlers.push(handler);
+ }
+ });
+
+ if (typeof(web3) !== "undefined" && web3.providers !== undefined) {
+ web3.providers.HttpRpcProvider = HttpRpcProvider;
+ }
+})();
+
diff --git a/index.html b/index.html
index fc658c00ad..2b3f50a141 100644
--- a/index.html
+++ b/index.html
@@ -5,6 +5,7 @@
+