diff --git a/adapters.json b/adapters.json
index 18b4e1ba691..5c6f84a193d 100644
--- a/adapters.json
+++ b/adapters.json
@@ -14,6 +14,7 @@
     "piximedia",
     "pubmatic",
     "pulsepoint",
+    "rhythmone",
     "rubicon",
     "sekindo",
     "sonobi",
diff --git a/src/adapters/rhythmone.js b/src/adapters/rhythmone.js
new file mode 100644
index 00000000000..46f3ffb0160
--- /dev/null
+++ b/src/adapters/rhythmone.js
@@ -0,0 +1,343 @@
+var bidmanager = require('../bidmanager.js'),
+  bidfactory = require('../bidfactory.js'),
+  utils = require('../utils.js'),
+  CONSTANTS = require('../constants.json');
+
+import {ajax as ajax} from '../ajax';
+
+function track(debug, p1, p2, p3) {
+  if(debug === true){
+    console.log('GA: %s %s %s', p1, p2, p3 || '');
+  }
+}
+
+var w = (typeof window !== "undefined" ? window : {});
+w.trackR1Impression = track;
+  
+module.exports = function(bidManager, global, loader){
+
+  var version = "0.9.0.0",
+    defaultZone = "1r",
+    defaultPath = "mvo",
+    bidfloor = 0,
+    currency = "USD",
+    debug = false,
+    auctionEnded = false,
+    requestCompleted = false,
+    placementCodes = {};
+    
+  if(typeof global === "undefined")
+    global = window;
+      
+  if(typeof bidManager === "undefined")
+    bidManager = bidmanager;
+    
+  if(typeof loader === "undefined")
+    loader = ajax;
+  
+  function applyMacros(txt, values){
+    return txt.replace(/\{([^\}]+)\}/g, function(match){
+      var v = values[match.replace(/[\{\}]/g, "").toLowerCase()];
+      if(typeof v !== "undefined") return v;
+      return match;
+    });
+  }
+  
+  function load(bidParams, url, postData, callback){
+    if(bidParams.method === "get"){
+      loader(url, function(responseText, response){
+        if(response.status === 200)
+          callback(200, "success", response.responseText);
+        else
+          callback(-1, "http error "+response.status, response.responseText);
+      }, false, {method:"GET"});
+    }
+    else{
+      loader(url, function(responseText, response){
+        if(response.status === 200)
+          callback(200, "success", response.responseText);
+        else
+          callback(-1, "http error "+response.status, response.responseText);
+      }, postData, {method:"POST", contentType: "application/json"});
+    }
+  }
+
+  var bidderCode = "rhythmone",
+    bidLostTimeout = null;
+  
+  function setIfPresent(o, key, value){
+    try{
+      if(typeof value === "function")
+        o[key] = value();
+    }catch(ex){}
+  }
+  
+  function logToConsole(txt){
+    if(debug)
+      console.log(txt);
+  }
+  
+  function sniffAuctionEnd(){
+  
+    global.$$PREBID_GLOBAL$$.onEvent('bidWon', function (e) {
+    
+      if(e.bidderCode === bidderCode){
+        placementCodes[e.adUnitCode] = true;
+        track(debug, 'hb', "bidWon");
+      }
+      
+      if(auctionEnded){
+        clearTimeout(bidLostTimeout);
+        bidLostTimeout = setTimeout(function(){
+          for(var k in placementCodes)
+            if(placementCodes[k] === false)
+              track(debug, 'hb', "bidLost");
+        }, 50);
+      }
+    });
+  
+    global.$$PREBID_GLOBAL$$.onEvent('auctionEnd', function () {
+    
+      auctionEnded = true;
+
+      if(requestCompleted === false)
+        track(debug, 'hb', 'rmpReplyFail', "prebid timeout post auction");
+    });
+  }
+  
+  function getBidParameters(bids){
+    for(var i=0;i<bids.length;i++)
+      if(typeof bids[i].params === "object" && bids[i].params.placementId)
+        return bids[i].params;
+    return null;
+  }
+  
+  function noBids(params){
+    for(var i=0; i<params.bids.length; i++){
+      if(params.bids[i].success !== 1){
+        var bid = bidfactory.createBid(CONSTANTS.STATUS.NO_BID);
+        bid.bidderCode = bidderCode;
+        track(debug, 'hb', 'bidResponse', 0);
+        bidmanager.addBidResponse(params.bids[i].placementCode, bid);
+      }
+    }
+  }
+  
+  function getRMPURL(bidParams, ortbJSON, bids){
+    var endpoint = "//tag.1rx.io/rmp/{placementId}/0/{path}?z={zone}",
+      query = [];
+
+    if(typeof bidParams.endpoint === "string")
+      endpoint = bidParams.endpoint;
+    
+    if(typeof bidParams.zone === "string")
+      defaultZone = bidParams.zone;
+      
+    if(typeof bidParams.path === "string")
+      defaultPath = bidParams.path;
+      
+    if(bidParams.debug === true)
+      debug = true;
+    
+    if(bidParams.trace === true)
+      query.push("trace=true");
+    
+    endpoint = applyMacros(endpoint, {
+      placementid:bidParams.placementId,
+      zone: defaultZone,
+      path: defaultPath
+    });
+
+    function p(k,v){
+      if(typeof v !== "undefined")
+        query.push(encodeURIComponent(k)+"="+encodeURIComponent(v));
+    }
+    
+    if(bidParams.method === "get"){
+    
+      p("domain", ortbJSON.site.domain);
+      p("title", ortbJSON.site.name);
+      p("url", ortbJSON.site.page);
+      p("dsh", ortbJSON.device.h);
+      p("dsw", ortbJSON.device.w);
+      p("tz", (new Date()).getTimezoneOffset());
+      p("dtype", ortbJSON.device.devicetype);
+      
+      var placementCodes = [],
+        heights = [],
+        widths = [],
+        floors = [];
+      
+      for(var i = 0; i<bids.length; i++){
+
+        track(debug, 'hb', 'bidRequest');
+        var th = [], tw = [];
+        
+        for(var j = 0; j<bids[i].sizes.length; j++){
+          tw.push(bids[i].sizes[j][0]);
+          th.push(bids[i].sizes[j][1]);
+        }
+        placementCodes.push(bids[i].placementCode);
+        heights.push(th.join("|"));
+        widths.push(tw.join("|"));
+        floors.push(0);
+      }
+      
+      p("imp", placementCodes.join(","));
+      p("w", widths.join(","));
+      p("h", heights.join(","));
+      p("floor", floors.join(","));
+    }
+    
+    endpoint += "&"+query.join("&");
+    
+    return endpoint;
+  }
+  
+  function getORTBJSON(bids, slotMap, bidParams){
+    var o = {
+      "device": {
+        "langauge": global.navigator.language,
+        "dnt": (global.navigator.doNotTrack === 1 ? 1 : 0)
+      },
+      "at": 2,
+      "site": {},
+      "tmax": 3000,
+      "cur": [currency],
+      "id": utils.generateUUID(),
+      "imp":[]
+    };
+    
+    setIfPresent(o.site, "page", function(){
+      var l;
+      try{l = global.top.document.location.href.toString();}
+      catch(ex){l = document.location.href.toString();}
+      return l;
+    });
+    setIfPresent(o.site, "domain", function(){
+      var d = document.location.ancestorOrigins;
+      if(d && d.length > 0)
+        return d[d.length-1];
+      return global.top.document.location.hostname;
+    });
+    setIfPresent(o.site, "name", function(){return global.top.document.title;});
+    
+    o.device.devicetype = ((/(ios|ipod|ipad|iphone|android)/i).test(global.navigator.userAgent) ? 1 : ((/(smart[-]?tv|hbbtv|appletv|googletv|hdmi|netcast\.tv|viera|nettv|roku|\bdtv\b|sonydtv|inettvbrowser|\btv\b)/i).test(global.navigator.userAgent) ? 3 : 2));
+    
+    setIfPresent(o.device, "h", function(){return global.screen.height;});
+    setIfPresent(o.device, "w", function(){return global.screen.width;});
+    
+    for(var i = 0; i<bids.length; i++){
+      var bidID = utils.generateUUID();
+      slotMap[bidID] = bids[i];
+      slotMap[bids[i].placementCode] = bids[i];
+      
+      if(bidParams.method === "post")
+        track(debug, 'hb', 'bidRequest');
+        
+      for(var j = 0; j<bids[i].sizes.length; j++){
+        o.imp.push({
+          "id": bidID,
+          "tagId": bids[i].placementCode,
+          "bidfloor": bidfloor,
+          "bidfloorcur": currency,
+          "banner": {
+            "id": utils.generateUUID(),
+            "pos": 0,
+            "w": bids[i].sizes[j][0],
+            "h": bids[i].sizes[j][1]
+          }
+        });
+      }
+    }
+    
+    return o;
+  }
+  
+  this.callBids = function(params){
+
+    var slotMap = {},
+      bidParams = getBidParameters(params.bids);
+  
+    debug = (bidParams !== null && bidParams.debug === true);
+  
+    track(debug, 'hb', 'callBids');
+
+    if(bidParams === null){
+      noBids(params);
+      track(debug, 'hb', 'misconfiguration');
+      return;
+    }
+
+    // default to GET request
+    if(typeof bidParams.method !== "string")
+      bidParams.method = "get";
+    
+    bidParams.method = bidParams.method.toLowerCase();
+    
+    sniffAuctionEnd();
+
+    track(debug, 'hb', 'rmpRequest');
+
+    var ortbJSON = getORTBJSON(params.bids, slotMap, bidParams);
+    
+    load(bidParams, getRMPURL(bidParams, ortbJSON, params.bids), JSON.stringify(ortbJSON), function(code, msg, txt){
+    
+      if(auctionEnded === true)
+        return;
+    
+      requestCompleted = true;
+    
+      logToConsole(txt);
+    
+      var bidCount = 0;
+    
+      if(code === -1)
+        track(debug, 'hb', 'rmpReplyFail', msg);
+      else{
+        try{
+          var result = JSON.parse(txt),
+            registerBid = function(bid){
+            
+              slotMap[bid.impid].success = 1;
+              
+              var pbResponse = bidfactory.createBid(CONSTANTS.STATUS.GOOD),
+                placementCode = slotMap[bid.impid].placementCode;
+            
+              placementCodes[placementCode] = false;
+            
+              pbResponse.bidderCode = bidderCode;
+              pbResponse.cpm = parseFloat(bid.price);
+              pbResponse.width = bid.w;
+              pbResponse.height = bid.h;
+              pbResponse.ad = bid.adm;
+              
+              logToConsole("registering bid "+placementCode+" "+JSON.stringify(pbResponse));
+              
+              track(debug, 'hb', 'bidResponse', 1);
+              bidManager.addBidResponse(placementCode, pbResponse);
+              bidCount++;
+            };
+            
+          track(debug, 'hb', 'rmpReplySuccess');
+          
+          for(var i=0; result.seatbid && i<result.seatbid.length; i++)
+            for(var j=0; result.seatbid[i].bid && j<result.seatbid[i].bid.length; j++)
+              registerBid(result.seatbid[i].bid[j]);
+        }
+        catch(ex){
+          track(debug, 'hb', 'rmpReplyFail', 'invalid json in rmp response');
+        }
+      }
+
+      // if no bids are successful, inform prebid
+      if(bidCount === 0)
+        noBids(params);
+      
+      // when all bids are complete, log a report
+      track(debug, 'hb', 'bidsComplete');
+    });
+    
+    logToConsole("version: "+version);
+  };
+};
\ No newline at end of file
diff --git a/test/spec/adapters/rhythmone_spec.js b/test/spec/adapters/rhythmone_spec.js
new file mode 100644
index 00000000000..29c308de74b
--- /dev/null
+++ b/test/spec/adapters/rhythmone_spec.js
@@ -0,0 +1,89 @@
+var r1 = require('../../../src/adapters/rhythmone.js');
+var assert = require('assert');
+
+describe('rhythmone adapter tests', function () {
+	describe('rhythmoneResponse', function () {
+
+		var fakeResponse = {
+			"id": "1fe94c2e-4b31-4e09-b074-ba90fe7ce92d",
+			"seatbid": [
+				{
+					"bid": [
+						{
+							"id": "ff8b09b1-5264-52be-4b7b-0156526452bf",
+							"impid": "div-gpt-ad-1438287399331-0",
+							"price": 1.0,
+							"adid": "35858",
+							"adm": "<a href=\"http://tag.1rx.io/rmp/34887/0/ch?ajkey=V12FF640238J-573H14H141407CFD01K3585…0H16X12iamspartacus2EW3comH16X12iamspartacus2EW3comG0QG0Q919191I72600005A\" target=\"_blank\"><img src=\"http://img.1rx.io/banners/media/0/14/0/78/1464186216852_1R-300x250_border.png\" height=\"250\" width=\"300\" border=\"0\" alt=\"\"></a><script src=\"http://tag.1rx.io/rmp/34887/0/impr?ajkey=V12FF640238J-573H14H141407CFD01K35…3comH16X12iamspartacus2EW3comG0QG0Q919191I72600005A&obid=${AUCTION_PRICE}\" type=\"text/javascript\"></script><script type=\"text/javascript\">\n  setTimeout(function() {\n    var iframe = document.createElement('iframe');\n    var xpr9190 = \"http\";\n    if (window.location.protocol == 'https:') xpr9190 += \"s\";\n    iframe.id = iframe.tagName+\"_\"+(Math.random() * 1000000000);\n    iframe.style.display = \"block\";\n    iframe.style.width = \"0px\";\n    iframe.style.height = \"0px\";\n    iframe.src = xpr9190 + \"://sync.1rx.io/usersync2/rmp\";\n    if ((document.body === undefined) || (document.body == null )) {  \n      var iframeHtml = iframe.outerHTML || (function(n){ /**/\n          var div = document.createElement('div');\n          div.appendChild( n.cloneNode(true) );\n          return div.innerHTML;\n      })(iframe);\n      document.write(iframeHtml);\n    } else {\n      /**/\n      document.body.appendChild(iframe);\n    }\n  }, (Math.floor(Math.random() * 5)+1));\n</script>",
+							"adomain": ["www.rhythmone.com"],
+							"cid": "35857",
+							"cat": [],
+							"h": 250,
+							"w": 300
+						}
+					],
+					"seat": "14",
+					"group": 0
+				}
+			],
+			"bidid": "ff8b09b1-5264-52be-4b7b-0156526452bf"
+		};
+	
+    var endEvent = function(){},
+      wonEvent = function(){};;
+  
+		var z = new r1(
+			{
+				addBidResponse: function(placementcode, adResponse){
+					it("should echo placementcode div-gpt-ad-1438287399331-0", function(){
+						assert.equal(placementcode, "div-gpt-ad-1438287399331-0");
+					});
+					it("should have the expected ad response", function(){
+						assert.equal((adResponse.ad.length > 0), true);
+						assert.equal(adResponse.width, 300);
+						assert.equal(adResponse.height, 250);
+						assert.equal(adResponse.cpm, 1);
+						assert.equal(adResponse.bidderCode, "rhythmone");
+					});
+				}
+			},
+      {
+        "navigator":{},
+        "pbjs":{
+          "onEvent":function(e, f){
+            if(e.toLowerCase() === "auctionend") endEvent = f;
+            if(e.toLowerCase() === "bidwon") wonEvent = f;
+          },
+          "getBidResponses":function(){return {"div-gpt-ad-1438287399331-0":{"bids":[{cpm:1,bidderCode:"rhythmone"},{cpm:2,bidderCode:"rhythmone"}]}};}
+        }
+      },
+      function(url, callback){
+        callback(JSON.stringify(fakeResponse), {status:200, responseText: JSON.stringify(fakeResponse)});
+      }); 
+    
+		z.callBids({
+			"bidderCode":"rhythmone",
+			"bids":[
+				{
+					"bidder":"rhythmone",
+					"params":{
+						"placementId":"xyz",
+						"keywords":"",
+						"categories":[],
+            "trace":true,
+            "method":"get",
+            "endpoint":"http://fakedomain.com"
+					},
+					"placementCode":"div-gpt-ad-1438287399331-0",
+					"sizes":[[300,250]]
+				}
+			]
+		});
+    
+    endEvent();
+    wonEvent({
+      bidderCode: "rhythmone",
+      adUnitCode: "div-gpt-ad-1438287399331-0"
+    });
+	});
+});
\ No newline at end of file