diff --git a/modules/viBidAdapter.js b/modules/viBidAdapter.js
new file mode 100644
index 00000000000..bcfc4e246ac
--- /dev/null
+++ b/modules/viBidAdapter.js
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+import * as utils from 'src/utils';
+import { registerBidder } from 'src/adapters/bidderFactory';
+import { BANNER } from 'src/mediaTypes';
+
+const BIDDER_CODE = 'vi';
+const SUPPORTED_MEDIA_TYPES = [BANNER];
+
+function isBidRequestValid(bid) {
+  return !!(bid.params.pubId);
+}
+
+function buildRequests(bidReqs) {
+  let imps = [];
+  utils._each(bidReqs, function (bid) {
+    imps.push({
+      id: bid.bidId,
+      sizes: utils.parseSizesInput(bid.sizes).map(size => size.split('x')),
+      bidFloor: parseFloat(bid.params.bidFloor) > 0 ? bid.params.bidFloor : 0
+    });
+  });
+
+  const bidRequest = {
+    id: bidReqs[0].requestId,
+    imps: imps,
+    publisherId: utils.getBidIdParameter('pubId', bidReqs[0].params),
+    siteId: utils.getBidIdParameter('siteId', bidReqs[0].params),
+    cat: utils.getBidIdParameter('cat', bidReqs[0].params),
+    language: utils.getBidIdParameter('lang', bidReqs[0].params),
+    domain: utils.getTopWindowLocation().hostname,
+    page: utils.getTopWindowUrl(),
+    referrer: utils.getTopWindowReferrer()
+  };
+  return {
+    method: 'POST',
+    url: `//pb.vi-serve.com/prebid/bid`,
+    data: JSON.stringify(bidRequest),
+    options: {contentType: 'application/json', withCredentials: false}
+  };
+}
+
+function interpretResponse(bids) {
+  let responses = [];
+  utils._each(bids.body, function(bid) {
+    responses.push({
+      requestId: bid.id,
+      cpm: parseFloat(bid.price),
+      width: parseInt(bid.width, 10),
+      height: parseInt(bid.height, 10),
+      creativeId: bid.creativeId,
+      dealId: bid.dealId || null,
+      currency: 'USD',
+      netRevenue: true,
+      mediaType: BANNER,
+      ad: decodeURIComponent(`${bid.ad}`),
+      ttl: 60000
+    });
+  });
+  return responses;
+}
+
+export const spec = {
+  code: BIDDER_CODE,
+  supportedMediaTypes: SUPPORTED_MEDIA_TYPES,
+  isBidRequestValid,
+  buildRequests,
+  interpretResponse
+}
+
+registerBidder(spec);
diff --git a/modules/viBidAdapter.md b/modules/viBidAdapter.md
new file mode 100644
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+++ b/modules/viBidAdapter.md
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+# Overview
+
+```
+Module Name: vi bid adapter
+Module Type: Bidder adapter
+Maintainer: support@vi.ai
+```
+
+# Description
+
+The video intelligence (vi) adapter integration to the Prebid library.
+Connects to vi’s demand sources.
+There should be only one ad unit with vi bid adapter on each single page.
+
+# Test Parameters
+
+```
+var adUnits = [{
+    code: 'div-0',
+    sizes: [[320, 480]],
+    bids: [{
+        bidder: 'vi',
+        params: {
+            pubId: 'sb_test',
+            lang: 'en-US',
+            cat: 'IAB1',
+	        bidFloor: 0.05 //optional
+        }
+    }]
+}];
+```
+
+# Parameters
+
+| Name          | Scope    | Description                                     | Example                           |
+| :------------ | :------- | :---------------------------------------------- | :--------------------------------- |
+| `pubId` | required | Publisher ID, provided by vi           | 'sb_test' |
+| `lang`      | required | Ad language, in ISO 639-1 language code format  | 'en-US', 'es-ES', 'de'              |
+| `cat`      | required | Ad IAB category (top-level or subcategory), single one supported  | 'IAB1', 'IAB9-1'        |
+| `bidFloor`      | optional | Lowest value of expected bid price  | 0.001        |
+
diff --git a/test/spec/modules/viBidAdapter_spec.js b/test/spec/modules/viBidAdapter_spec.js
new file mode 100644
index 00000000000..e8b0fbcc4b2
--- /dev/null
+++ b/test/spec/modules/viBidAdapter_spec.js
@@ -0,0 +1,139 @@
+import { expect } from 'chai';
+import { spec } from 'modules/viBidAdapter';
+import { newBidder } from 'src/adapters/bidderFactory';
+
+const ENDPOINT = `//pb.vi-serve.com/prebid/bid`;
+
+describe('viBidAdapter', function() {
+  newBidder(spec);
+
+  describe('isBidRequestValid', () => {
+    let bid = {
+      'bidder': 'vi',
+      'params': {
+        'pubId': 'sb_test',
+        'lang': 'en-US',
+        'cat': 'IAB1',
+        'bidFloor': 0.05
+      },
+      'adUnitCode': 'adunit-code',
+      'sizes': [
+        [320, 480]
+      ],
+      'bidId': '29b891ad542377',
+      'bidderRequestId': '1dc9a08206a57b',
+      'requestId': '24176695-e3f0-44db-815b-ed97cf5ad49b',
+      'placementCode': 'div-gpt-ad-1460505748561-0',
+      'transactionId': '474da635-9cf0-4188-a3d9-58961be8f905'
+    };
+
+    it('should return true when required params found', () => {
+      expect(spec.isBidRequestValid(bid)).to.equal(true);
+    });
+
+    it('should return false when pubId not passed', () => {
+      bid.params.pubId = undefined;
+      expect(spec.isBidRequestValid(bid)).to.equal(false);
+    });
+  });
+
+  describe('buildRequests', () => {
+    let bidRequests = [{
+      'bidder': 'vi',
+      'params': {
+        'pubId': 'sb_test',
+        'lang': 'en-US',
+        'cat': 'IAB1',
+        'bidFloor': 0.05
+      },
+      'adUnitCode': 'adunit-code',
+      'sizes': [
+        [320, 480]
+      ],
+      'bidId': '29b891ad542377',
+      'bidderRequestId': '1dc9a08206a57b',
+      'requestId': '24176695-e3f0-44db-815b-ed97cf5ad49b',
+      'placementCode': 'div-gpt-ad-1460505748561-0',
+      'transactionId': '474da635-9cf0-4188-a3d9-58961be8f905'
+    }];
+
+    const request = spec.buildRequests(bidRequests);
+
+    it('POST bid request to vi', () => {
+      expect(request.method).to.equal('POST');
+    });
+
+    it('check endpoint URL', () => {
+      expect(request.url).to.equal(ENDPOINT)
+    });
+  });
+
+  describe('buildRequests can handle size in 1-dim array', () => {
+    let bidRequests = [{
+      'bidder': 'vi',
+      'params': {
+        'pubId': 'sb_test',
+        'lang': 'en-US',
+        'cat': 'IAB1',
+        'bidFloor': 0.05
+      },
+      'adUnitCode': 'adunit-code',
+      'sizes': [320, 480],
+      'bidId': '29b891ad542377',
+      'bidderRequestId': '1dc9a08206a57b',
+      'requestId': '24176695-e3f0-44db-815b-ed97cf5ad49b',
+      'placementCode': 'div-gpt-ad-1460505748561-0',
+      'transactionId': '474da635-9cf0-4188-a3d9-58961be8f905'
+    }];
+
+    const request = spec.buildRequests(bidRequests);
+
+    it('POST bid request to vi', () => {
+      expect(request.method).to.equal('POST');
+    });
+
+    it('check endpoint URL', () => {
+      expect(request.url).to.equal(ENDPOINT)
+    });
+  });
+
+  describe('interpretResponse', () => {
+    let response = {
+      body: [{
+        'id': '29b891ad542377',
+        'price': 0.1,
+        'width': 320,
+        'height': 480,
+        'ad': '<!-- Real ad markup -->',
+        'creativeId': 'dZsPGv'
+      }]
+    };
+
+    it('should get the correct bid response', () => {
+      let expectedResponse = [{
+        'requestId': '29b891ad542377',
+        'cpm': 0.1,
+        'width': 320,
+        'height': 480,
+        'creativeId': 'dZsPGv',
+        'dealId': null,
+        'currency': 'USD',
+        'netRevenue': true,
+        'mediaType': 'banner',
+        'ad': decodeURIComponent(`<!-- Creative -->`),
+        'ttl': 60000
+      }];
+
+      let result = spec.interpretResponse(response);
+      expect(Object.keys(result[0])).to.deep.equal(Object.keys(expectedResponse[0]));
+    });
+
+    it('handles empty bid response', () => {
+      let response = {
+        body: []
+      };
+      let result = spec.interpretResponse(response);
+      expect(result.length).to.equal(0);
+    });
+  });
+});