diff --git a/modules/asealBidAdapter.js b/modules/asealBidAdapter.js
new file mode 100644
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+++ b/modules/asealBidAdapter.js
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+import { registerBidder } from '../src/adapters/bidderFactory.js';
+import { BANNER } from '../src/mediaTypes.js';
+import { config } from '../src/config.js';
+
+export const BIDDER_CODE = 'aseal';
+const SUPPORTED_AD_TYPES = [BANNER];
+export const API_ENDPOINT = 'https://tkprebid.aotter.net/prebid/adapter';
+export const HEADER_AOTTER_VERSION = 'prebid_0.0.1';
+
+export const spec = {
+  code: BIDDER_CODE,
+  aliases: ['aotter', 'trek'],
+  supportedMediaTypes: SUPPORTED_AD_TYPES,
+
+  isBidRequestValid: (bid) => !!bid.params.placeUid && typeof bid.params.placeUid === 'string',
+
+  buildRequests: (validBidRequests, bidderRequest) => {
+    if (validBidRequests.length === 0) {
+      return [];
+    }
+
+    const clientId =
+    config.getConfig('aseal.clientId') || '';
+
+    const data = {
+      bids: validBidRequests,
+      refererInfo: bidderRequest.refererInfo,
+    };
+
+    const options = {
+      contentType: 'application/json',
+      withCredentials: true,
+      customHeaders: {
+        'x-aotter-clientid': clientId,
+        'x-aotter-version': HEADER_AOTTER_VERSION,
+      },
+    };
+
+    return [{
+      method: 'POST',
+      url: API_ENDPOINT,
+      data,
+      options,
+    }];
+  },
+
+  interpretResponse: (serverResponse, bidRequest) => {
+    if (!Array.isArray(serverResponse.body)) {
+      return [];
+    }
+
+    const bidResponses = serverResponse.body;
+
+    return bidResponses;
+  },
+};
+
+registerBidder(spec);
diff --git a/modules/asealBidAdapter.md b/modules/asealBidAdapter.md
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index 00000000000..d13b802f736
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+++ b/modules/asealBidAdapter.md
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+# Overview
+
+```
+Module Name:  Aseal Bid Adapter
+Module Type:  Bidder Adapter
+Maintainer:   tech-service@aotter.net
+```
+
+# Description
+
+Module that connects to Aseal server for bids.
+Supported Ad Formats:
+
+- Banner
+
+# Configuration
+
+Following configuration is required:
+
+```js
+pbjs.setConfig({
+  aseal: {
+    clientId: "YOUR_CLIENT_ID"
+  }
+});
+```
+
+# Ad Unit Example
+
+```js
+var adUnits = [
+  {
+    code: "banner-div",
+    mediaTypes: {
+      banner: {
+        sizes: [
+          [300, 250],
+          [300, 600]
+        ]
+      }
+    },
+    bids: [
+      {
+        bidder: "aseal",
+        params: {
+          placeUid: "f4a74f73-9a74-4a87-91c9-545c6316c23d"
+        }
+      }
+    ]
+  }
+];
+```
diff --git a/test/spec/modules/asealBidAdapter_spec.js b/test/spec/modules/asealBidAdapter_spec.js
new file mode 100644
index 00000000000..ef74dd3fc05
--- /dev/null
+++ b/test/spec/modules/asealBidAdapter_spec.js
@@ -0,0 +1,144 @@
+import { expect } from 'chai';
+import { spec, BIDDER_CODE, API_ENDPOINT, HEADER_AOTTER_VERSION } from 'modules/asealBidAdapter.js';
+import { newBidder } from 'src/adapters/bidderFactory.js';
+import { config } from 'src/config.js';
+
+const TEST_CLIENT_ID = 'TEST_CLIENT_ID'
+
+describe('asealBidAdapter', () => {
+  const adapter = newBidder(spec);
+
+  describe('inherited functions', () => {
+    it('exists and is a function', () => {
+      expect(adapter.callBids).to.exist.and.to.be.a('function')
+    })
+  });
+
+  describe('isBidRequestValid', () => {
+    const bid = {
+      bidder: 'aseal',
+      params: {
+        placeUid: '123'
+      }
+    };
+
+    it('should return true when required params found', () => {
+      expect(spec.isBidRequestValid(bid)).to.equal(true)
+    });
+
+    it('should return false when required param placeUid is not passed', () => {
+      bid.params = {
+        placeUid: ''
+      }
+      expect(spec.isBidRequestValid(bid)).to.equal(false)
+    });
+
+    it('should return false when required param placeUid is wrong type', () => {
+      bid.params = {
+        placeUid: null
+      }
+      expect(spec.isBidRequestValid(bid)).to.equal(false)
+    });
+
+    it('should return false when required params are not passed', () => {
+      let bid = Object.assign({}, bid);
+      delete bid.params;
+      bid.params = {};
+      expect(spec.isBidRequestValid(bid)).to.equal(false)
+    })
+  });
+
+  describe('buildRequests', () => {
+    afterEach(() => {
+      config.resetConfig();
+    });
+
+    it('should return an empty array when there are no bid requests', () => {
+      const bidRequests = []
+      const request = spec.buildRequests(bidRequests)
+
+      expect(request).to.be.an('array').that.is.empty
+    });
+
+    it('should send `x-aotter-clientid` header as empty string when user not set config `clientId`', () => {
+      const bidRequests = [{
+        bidder: BIDDER_CODE,
+        params: {
+          placeUid: '123'
+        }
+      }]
+
+      const bidderRequest = {}
+      const request = spec.buildRequests(bidRequests, bidderRequest)[0];
+
+      expect(request.options.customHeaders['x-aotter-clientid']).equal('')
+    })
+
+    it('should send bid requests to ENDPOINT via POST', () => {
+      const bidRequests = [{
+        bidder: BIDDER_CODE,
+        params: {
+          placeUid: '123'
+        }
+      }]
+
+      const bidderRequest = {
+        refererInfo: {
+          referer: 'https://aseal.in/',
+        }
+      }
+
+      config.setConfig({
+        aseal: {
+          clientId: TEST_CLIENT_ID
+        }
+      });
+      const request = spec.buildRequests(bidRequests, bidderRequest)[0];
+
+      expect(request.url).to.equal(API_ENDPOINT);
+      expect(request.method).to.equal('POST')
+      expect(request.options).deep.equal({
+        contentType: 'application/json',
+        withCredentials: true,
+        customHeaders: {
+          'x-aotter-clientid': TEST_CLIENT_ID,
+          'x-aotter-version': HEADER_AOTTER_VERSION,
+        }
+      });
+      expect(request.data).deep.equal({
+        bids: bidRequests,
+        refererInfo: bidderRequest.refererInfo,
+      });
+    });
+  });
+
+  describe('interpretResponse', () => {
+    it('should return an empty array when there are no bids', () => {
+      const serverResponse = {}
+      const response = spec.interpretResponse(serverResponse);
+
+      expect(response).is.an('array').that.is.empty;
+    });
+
+    it('should get correct bid response', () => {
+      const serverResponse = {
+        body: [{
+          requestId: '2ef08f145b7a4f',
+          cpm: 3,
+          width: 300,
+          height: 250,
+          creativeId: '123abc',
+          dealId: '123abc',
+          currency: 'USD',
+          netRevenue: false,
+          mediaType: 'banner',
+          ttl: 300,
+          ad: '<!-- adtag -->'
+        }]
+      }
+      const response = spec.interpretResponse(serverResponse);
+
+      expect(response).deep.equal(serverResponse.body);
+    });
+  })
+});