diff --git a/modules/rubiconBidAdapter.js b/modules/rubiconBidAdapter.js
index 998f4826ead..fddf70229af 100644
--- a/modules/rubiconBidAdapter.js
+++ b/modules/rubiconBidAdapter.js
@@ -260,6 +260,10 @@ export const spec = {
         utils.deepSetValue(data, 'regs.coppa', 1);
       }
 
+      if (bidRequest.schain && hasValidSupplyChainParams(bidRequest.schain)) {
+        utils.deepSetValue(data, 'source.ext.schain', bidRequest.schain);
+      }
+
       return {
         method: 'POST',
         url: VIDEO_ENDPOINT,
@@ -277,7 +281,7 @@ export const spec = {
           url: FASTLANE_ENDPOINT,
           data: spec.getOrderedParams(bidParams).reduce((paramString, key) => {
             const propValue = bidParams[key];
-            return ((utils.isStr(propValue) && propValue !== '') || utils.isNumber(propValue)) ? `${paramString}${key}=${encodeURIComponent(propValue)}&` : paramString;
+            return ((utils.isStr(propValue) && propValue !== '') || utils.isNumber(propValue)) ? `${paramString}${encodeParam(key, propValue)}&` : paramString;
           }, '') + `slots=1&rand=${Math.random()}`,
           bidRequest
         };
@@ -308,7 +312,7 @@ export const spec = {
             url: FASTLANE_ENDPOINT,
             data: spec.getOrderedParams(combinedSlotParams).reduce((paramString, key) => {
               const propValue = combinedSlotParams[key];
-              return ((utils.isStr(propValue) && propValue !== '') || utils.isNumber(propValue)) ? `${paramString}${key}=${encodeURIComponent(propValue)}&` : paramString;
+              return ((utils.isStr(propValue) && propValue !== '') || utils.isNumber(propValue)) ? `${paramString}${encodeParam(key, propValue)}&` : paramString;
             }, '') + `slots=${bidsInGroup.length}&rand=${Math.random()}`,
             bidRequest: bidsInGroup
           });
@@ -332,6 +336,8 @@ export const spec = {
       'p_pos',
       'gdpr',
       'gdpr_consent',
+      'rp_schain',
+      'rf',
       'tpid_tdid',
       'tpid_liveintent.com',
       'tg_v.LIseg',
@@ -482,9 +488,38 @@ export const spec = {
       data['coppa'] = 1;
     }
 
+    // if SupplyChain is supplied and contains all required fields
+    if (bidRequest.schain && hasValidSupplyChainParams(bidRequest.schain)) {
+      data.rp_schain = spec.serializeSupplyChain(bidRequest.schain);
+    }
+
     return data;
   },
 
+  /**
+   * Serializes schain params according to OpenRTB requirements
+   * @param {Object} supplyChain
+   * @returns {String}
+   */
+  serializeSupplyChain: function (supplyChain) {
+    const supplyChainIsValid = hasValidSupplyChainParams(supplyChain);
+    if (!supplyChainIsValid) return '';
+    const { ver, complete, nodes } = supplyChain;
+    return `${ver},${complete}!${spec.serializeSupplyChainNodes(nodes)}`;
+  },
+
+  /**
+   * Properly sorts schain object params
+   * @param {Array} nodes
+   * @returns {String}
+   */
+  serializeSupplyChainNodes: function (nodes) {
+    const nodePropOrder = ['asi', 'sid', 'hp', 'rid', 'name', 'domain'];
+    return nodes.map(node => {
+      return nodePropOrder.map(prop => encodeURIComponent(node[prop] || '')).join(',');
+    }).join('!');
+  },
+
   /**
    * @param {*} responseObj
    * @param {BidRequest|Object.<string, BidRequest[]>} bidRequest - if request was SRA the bidRequest argument will be a keyed BidRequest array object,
@@ -982,6 +1017,35 @@ export function hasValidVideoParams(bid) {
   return isValid;
 }
 
+/**
+ * Make sure the required params are present
+ * @param {Object} schain
+ * @param {Bool}
+ */
+export function hasValidSupplyChainParams(schain) {
+  let isValid = false;
+  const requiredFields = ['asi', 'sid', 'hp'];
+  if (!schain.nodes) return isValid;
+  isValid = schain.nodes.reduce((status, node) => {
+    if (!status) return status;
+    return requiredFields.every(field => node[field]);
+  }, true);
+  if (!isValid) utils.logError('Rubicon: required schain params missing');
+  return isValid;
+}
+
+/**
+ * Creates a URL key value param, encoding the
+ * param unless the key is schain
+ * @param {String} key
+ * @param {String} param
+ * @returns {String}
+ */
+export function encodeParam(key, param) {
+  if (key === 'rp_schain') return `rp_schain=${param}`;
+  return `${key}=${encodeURIComponent(param)}`;
+}
+
 /**
  * split array into multiple arrays of defined size
  * @param {Array} array
diff --git a/test/spec/modules/rubiconBidAdapter_spec.js b/test/spec/modules/rubiconBidAdapter_spec.js
index e037c7d5ed7..64c0f450e39 100644
--- a/test/spec/modules/rubiconBidAdapter_spec.js
+++ b/test/spec/modules/rubiconBidAdapter_spec.js
@@ -68,6 +68,49 @@ describe('the rubicon adapter', function () {
    * @param {Array.<overrideProps>} [indexOverMap]
    * @return {{status: string, cpm: number, zone_id: *, size_id: *, impression_id: *, ad_id: *, creative_id: string, type: string, targeting: *[]}}
    */
+
+  function getBidderRequest() {
+    return {
+      bidderCode: 'rubicon',
+      auctionId: 'c45dd708-a418-42ec-b8a7-b70a6c6fab0a',
+      bidderRequestId: '178e34bad3658f',
+      bids: [
+        {
+          bidder: 'rubicon',
+          params: {
+            accountId: '14062',
+            siteId: '70608',
+            zoneId: '335918',
+            userId: '12346',
+            keywords: ['a', 'b', 'c'],
+            inventory: {
+              rating: '5-star', // This actually should not be sent to frank!! causes 400
+              prodtype: ['tech', 'mobile']
+            },
+            visitor: {
+              ucat: 'new',
+              lastsearch: 'iphone',
+              likes: ['sports', 'video games']
+            },
+            position: 'atf',
+            referrer: 'localhost',
+            latLong: [40.7607823, '111.8910325']
+          },
+          adUnitCode: '/19968336/header-bid-tag-0',
+          code: 'div-1',
+          sizes: [[300, 250], [320, 50]],
+          bidId: '2ffb201a808da7',
+          bidderRequestId: '178e34bad3658f',
+          auctionId: 'c45dd708-a418-42ec-b8a7-b70a6c6fab0a',
+          transactionId: 'd45dd707-a418-42ec-b8a7-b70a6c6fab0b'
+        }
+      ],
+      start: 1472239426002,
+      auctionStart: 1472239426000,
+      timeout: 5000
+    };
+  };
+
   function createResponseAdByIndex(i, sizeId, indexOverMap) {
     const overridePropMap = (indexOverMap && indexOverMap[i] && typeof indexOverMap[i] === 'object') ? indexOverMap[i] : {};
     const overrideProps = Object.keys(overridePropMap).reduce((aggregate, key) => {
@@ -2267,4 +2310,98 @@ describe('the rubicon adapter', function () {
       });
     });
   });
+
+  describe.only('Supply Chain Support', function() {
+    const nodePropsOrder = ['asi', 'sid', 'hp', 'rid', 'name', 'domain'];
+    let bidRequests;
+    let schainConfig;
+
+    const getSupplyChainConfig = () => {
+      return {
+        ver: '1.0',
+        complete: 1,
+        nodes: [
+          {
+            asi: 'rubicon.com',
+            sid: '1234',
+            hp: 1,
+            rid: 'bid-request-1',
+            name: 'pub one',
+            domain: 'pub1.com'
+          },
+          {
+            asi: 'theexchange.com',
+            sid: '5678',
+            hp: 1,
+            rid: 'bid-request-2',
+            name: 'pub two',
+            domain: 'pub2.com'
+          },
+          {
+            asi: 'wesellads.com',
+            sid: '9876',
+            hp: 1,
+            rid: 'bid-request-3',
+            // name: 'alladsallthetime',
+            domain: 'alladsallthetime.com'
+          }
+        ]
+      };
+    };
+
+    beforeEach(() => {
+      bidRequests = getBidderRequest();
+      schainConfig = getSupplyChainConfig();
+      bidRequests.bids[0].schain = schainConfig;
+    });
+
+    it('should properly serialize schain object with correct delimiters', () => {
+      const results = spec.buildRequests(bidRequests.bids, bidRequests);
+      const numNodes = schainConfig.nodes.length;
+      const schain = parseQuery(results[0].data).rp_schain;
+
+      // each node serialization should start with an !
+      expect(schain.match(/!/g).length).to.equal(numNodes);
+
+      // 5 commas per node plus 1 for version
+      expect(schain.match(/,/g).length).to.equal(numNodes * 5 + 1);
+    });
+
+    it('should send the proper version for the schain', () => {
+      const results = spec.buildRequests(bidRequests.bids, bidRequests);
+      const schain = parseQuery(results[0].data).rp_schain.split('!');
+      const version = schain.shift().split(',')[0];
+      expect(version).to.equal(bidRequests.bids[0].schain.ver);
+    });
+
+    it('should send the correct value for complete in schain', () => {
+      const results = spec.buildRequests(bidRequests.bids, bidRequests);
+      const schain = parseQuery(results[0].data).rp_schain.split('!');
+      const complete = schain.shift().split(',')[1];
+      expect(complete).to.equal(String(bidRequests.bids[0].schain.complete));
+    });
+
+    it('should send available params in the right order', () => {
+      const results = spec.buildRequests(bidRequests.bids, bidRequests);
+      const schain = parseQuery(results[0].data).rp_schain.split('!');
+      schain.shift();
+
+      schain.forEach((serializeNode, nodeIndex) => {
+        const nodeProps = serializeNode.split(',');
+        nodeProps.forEach((nodeProp, propIndex) => {
+          const node = schainConfig.nodes[nodeIndex];
+          const key = nodePropsOrder[propIndex];
+          expect(nodeProp).to.equal(node[key] ? String(node[key]) : '');
+        });
+      });
+    });
+
+    it('should copy the schain JSON to to bid.source.ext.schain', () => {
+      createVideoBidderRequest();
+      const schain = getSupplyChainConfig();
+      bidderRequest.bids[0].schain = schain;
+      const request = spec.buildRequests(bidderRequest.bids, bidderRequest);
+      expect(request[0].data.source.ext.schain).to.deep.equal(schain);
+    });
+  });
 });