diff --git a/modules/ownadxBidAdapter.js b/modules/ownadxBidAdapter.js
new file mode 100644
index 000000000000..5843735f3143
--- /dev/null
+++ b/modules/ownadxBidAdapter.js
@@ -0,0 +1,99 @@
+import { parseSizesInput, isEmpty } from '../src/utils.js';
+import { registerBidder } from '../src/adapters/bidderFactory.js';
+import { BANNER } from '../src/mediaTypes.js'
+
+/**
+ * @typedef {import('../src/adapters/bidderFactory.js').BidRequest} BidRequest
+ * @typedef {import('../src/adapters/bidderFactory.js').Bid} Bid
+ * @typedef {import('../src/adapters/bidderFactory.js').ServerResponse} ServerResponse
+ */
+
+const BIDDER_CODE = 'ownadx';
+const CUR = 'USD';
+const CREATIVE_TTL = 300;
+
+export const spec = {
+  code: BIDDER_CODE,
+  supportedMediaTypes: [BANNER],
+
+  /**
+   * Determines whether or not the given bid request is valid.
+   *
+   * @param {BidRequest} bid The bid params to validate.
+   * @return boolean True if this is a valid bid, and false otherwise.
+   */
+  isBidRequestValid: function (bid) {
+    return !!(bid.params.tokenId && bid.params.sspId && bid.params.seatId);
+  },
+
+  /**
+   * Make a server request from the list of BidRequests.
+   *
+   * @param validBidRequests
+   * @param bidderRequest
+   * @return Array Info describing the request to the server.
+   */
+  buildRequests: function (validBidRequests, bidderRequest) {
+    return validBidRequests.map(bidRequest => {
+      const sizes = parseSizesInput(bidRequest.params.size || bidRequest.sizes);
+      let mtype = 0;
+      if (bidRequest.mediaTypes[BANNER]) {
+        mtype = 1;
+      } else {
+        mtype = 2;
+      }
+
+      let tkn = bidRequest.params.tokenId;
+      let seatid = bidRequest.params.seatId;
+      let sspid = bidRequest.params.sspId;
+
+      const payload = {
+        sizes: sizes,
+        slotBidId: bidRequest.bidId,
+        PageUrl: bidderRequest.refererInfo.page,
+        mediaChannel: mtype
+      };
+      return {
+        method: 'POST',
+        url: `https://pbs-js.prebid-ownadx.com/publisher/prebid/${seatid}/${sspid}?token=${tkn}`,
+        data: payload
+      };
+    });
+  },
+
+  /**
+   * Unpack the response from the server into a list of bids.
+   *
+   * @param {ServerResponse} serverResponse A successful response from the server.
+   * @return {Bid[]} An array of bids which were nested inside the server.
+   */
+  interpretResponse: function (serverResponse) {
+    const response = serverResponse.body;
+    const bids = [];
+    if (isEmpty(response)) {
+      return bids;
+    }
+    const responseBid = {
+      width: response.width,
+      height: response.height,
+      token: response.tokenId,
+      ttl: CREATIVE_TTL,
+      requestId: response.slotBidId,
+      aType: response.adType || '1',
+      cpm: response.cpm,
+      creativeId: response.creativeId || 0,
+      netRevenue: response.netRevenue || false,
+      currency: response.currency || CUR,
+      meta: {
+        mediaType: response.mediaType || BANNER,
+        advertiserDomains: response.advertiserDomains || []
+      },
+      ad: response.adm
+    };
+    bids.push(responseBid);
+    return bids;
+  }
+
+};
+
+registerBidder(spec);
diff --git a/test/spec/modules/ownadxBidAdapter_spec.js b/test/spec/modules/ownadxBidAdapter_spec.js
new file mode 100644
index 000000000000..13d69b3a261e
--- /dev/null
+++ b/test/spec/modules/ownadxBidAdapter_spec.js
@@ -0,0 +1,103 @@
+import { expect } from 'chai';
+import { spec } from 'modules/ownadxBidAdapter.js';
+
+describe('ownadx', function () {
+  const METHOD = 'POST';
+  const URL = 'https://pbs-js.prebid-ownadx.com/publisher/prebid/9/1231?token=3f2941af4f7e446f9a19ca6045f8cff4';
+
+  const bidRequest = {
+    bidder: 'ownadx',
+    params: {
+      tokenId: '3f2941af4f7e446f9a19ca6045f8cff4',
+      sspId: '1231',
+      seatId: '9'
+    },
+    mediaTypes: {
+      banner: {
+        sizes: [[300, 250], [300, 600]]
+      }
+    },
+    sizes: [
+      [300, 250],
+      [300, 600]
+    ],
+    bidId: 'bid-id-123456',
+    adUnitCode: 'ad-unit-code-1',
+    bidderRequestId: 'bidder-request-id-123456',
+    auctionId: 'auction-id-123456',
+    transactionId: 'transaction-id-123456'
+  };
+
+  describe('isBidRequestValid', function () {
+    it('should return true where required params found', function () {
+      expect(spec.isBidRequestValid(bidRequest)).to.equal(true);
+    });
+  });
+
+  describe('buildRequests', function () {
+    let bidderRequest = {
+      refererInfo: {
+        page: 'https://www.test.com',
+        reachedTop: true,
+        isAmp: false,
+        numIframes: 0,
+        stack: [
+          'https://www.test.com'
+        ],
+        canonicalUrl: null
+      }
+    };
+
+    it('should build correct POST request for banner bid', function () {
+      const request = spec.buildRequests([bidRequest], bidderRequest)[0];
+      expect(request).to.be.an('object');
+      expect(request.method).to.equal('POST');
+      expect(request.url).to.equal('https://pbs-js.prebid-ownadx.com/publisher/prebid/9/1231?token=3f2941af4f7e446f9a19ca6045f8cff4');
+      const payload = request.data;
+      expect(payload).to.be.an('object');
+      expect(payload.sizes).to.be.an('array');
+      expect(payload.slotBidId).to.be.a('string');
+      expect(payload.PageUrl).to.be.a('string');
+      expect(payload.mediaChannel).to.be.a('number');
+    });
+  });
+
+  describe('interpretResponse', function () {
+    let serverResponse = {
+      body: {
+        tokenId: '3f2941af4f7e446f9a19ca6045f8cff4',
+        bid: 'BID-XXXX-XXXX',
+        width: '300',
+        height: '250',
+        cpm: '0.7',
+        adm: '<html><h1>Ad from OwnAdX</h1></html>',
+        slotBidId: 'bid-id-123456',
+        adType: '1',
+        statusText: 'Success'
+      }
+    };
+
+    let expectedResponse = [{
+      token: '3f2941af4f7e446f9a19ca6045f8cff4',
+      requestId: 'bid-id-123456',
+      cpm: '0.7',
+      currency: 'USD',
+      aType: '1',
+      netRevenue: false,
+      width: '300',
+      height: '250',
+      creativeId: 0,
+      ttl: 300,
+      ad: '<html><h1>Ad from OwnAdX</h1></html>',
+      meta: {
+        mediaType: 'banner',
+        advertiserDomains: []
+      }
+    }];
+
+    it('should correctly interpret valid banner response', function () {
+      let result = spec.interpretResponse(serverResponse);
+      expect(result).to.deep.equal(expectedResponse);
+    });
+  });
+});