diff --git a/modules/tezaBidAdapter.js b/modules/tezaBidAdapter.js
new file mode 100644
index 00000000000..20794702759
--- /dev/null
+++ b/modules/tezaBidAdapter.js
@@ -0,0 +1,144 @@
+// modules/tezaBidAdapter.js
+// Minimal banner-only adapter for OpenRTB 2.x endpoint
+// npm i -g gulp-cli  # one time command
+// npm ci  # one time command
+// Build:
+// `gulp build --modules=tezaBidAdapter`
+// Compiled output: ./build/dist/prebid.js
+
+// modules/tezaBidAdapter.js
+import { registerBidder } from '../src/adapters/bidderFactory.js';
+import { BANNER } from '../src/mediaTypes.js';
+import { config } from '../src/config.js';
+
+const BIDDER_CODE = 'teza';
+const ENDPOINT = 'https://dsp-us-east-1-nyc.tezatags.com/openrtb2/auction';
+
+function sizesToFormat(sizes) {
+  return (sizes || []).map(s => ({ w: s[0], h: s[1] }));
+}
+
+export const spec = {
+  code: BIDDER_CODE,
+  supportedMediaTypes: [BANNER],
+
+  isBidRequestValid(bid) {
+    return !!(bid?.params?.account);
+  },
+
+  buildRequests(validBidRequests, bidderRequest) {
+    if (!validBidRequests?.length) return [];
+
+    const b0 = validBidRequests[0];
+    const account = b0.params.account;
+    const test = b0.params.test ? 1 : 0;
+
+    const ortb2 = bidderRequest?.ortb2 || config.getConfig('ortb2') || {};
+    const eids = b0.userIdAsEids || [];
+    const schain = b0.schain || null;
+    const ri = bidderRequest?.refererInfo || {};
+
+    const imps = validBidRequests.map(bid => {
+      const sizes = bid.mediaTypes?.banner?.sizes || bid.sizes || [];
+      const tagid = bid.params.tagid || bid.ortb2Imp?.tagid || bid.ortb2Imp?.ext?.gpid || bid.adUnitCode;
+      return {
+        id: bid.bidId,
+        tagid: tagid,
+        secure: 1,
+        banner: { format: sizesToFormat(sizes) },
+        bidfloor: bid.params.bidfloor || 0.01,
+        bidfloorcur: bid.params.bidfloorcur || 'USD'
+      };
+    });
+
+    const regs = {
+      coppa: bidderRequest?.coppa ? 1 : 0,
+      ext: {
+        gdpr: bidderRequest?.gdprConsent?.gdprApplies ? 1 : 0,
+        us_privacy: bidderRequest?.uspConsent || undefined
+      },
+      gpp: bidderRequest?.gppConsent?.gppString,
+      gpp_sid: bidderRequest?.gppConsent?.applicableSections
+    };
+
+    const user = {
+      ...ortb2.user,
+      ext: {
+        ...(ortb2.user?.ext || {}),
+        consent: bidderRequest?.gdprConsent?.consentString,
+        eids
+      }
+    };
+
+    const device = {
+      ...ortb2.device,
+      ua: (typeof navigator !== 'undefined' ? navigator.userAgent : ''),
+      language: (typeof navigator !== 'undefined' ? navigator.language : undefined),
+      dnt: (typeof navigator !== 'undefined' && navigator.doNotTrack === '1') ? 1 : 0
+    };
+
+    const ortb = {
+      id: bidderRequest?.auctionId || String(Date.now()),
+      imp: imps,
+      at: 1,
+      tmax: bidderRequest?.timeout || 1000,
+      cur: ['USD'],
+      test,
+      site: {
+        ...ortb2.site,
+        domain: ri.domain || (typeof location !== 'undefined' ? location.hostname : ''),
+        page: ri.page || (typeof location !== 'undefined' ? location.href : '')
+      },
+      device,
+      user,
+      regs,
+      source: schain ? { ext: { schain } } : undefined
+    };
+
+    const url = `${ENDPOINT}?test=${test}&account=${encodeURIComponent(account)}`;
+    return { method: 'POST', url, data: ortb };
+  },
+
+  interpretResponse(serverResponse) {
+    const res = serverResponse?.body || {};
+    const cur = Array.isArray(res.cur) ? (res.cur[0] || 'USD') : (res.cur || 'USD');
+    const out = [];
+
+    (res.seatbid || []).forEach(sb => {
+      (sb.bid || []).forEach(b => {
+        out.push({
+          requestId: b.impid,
+          cpm: b.price || 0,
+          currency: cur,
+          width: b.w,
+          height: b.h,
+          creativeId: b.crid || b.id || 'teza-crid',
+          ttl: 30,
+          netRevenue: true,
+          ad: b.adm,
+          nurl: b.nurl,
+          burl: b.burl,
+          meta: { advertiserDomains: b.adomain || [] }
+        });
+      });
+    });
+
+    return out;
+  },
+
+  getUserSyncs() { return []; },
+
+  onBidWon(bid) {
+    let url = bid.burl || bid.nurl || '';
+    if (!url) return;
+
+    try {
+      url = decodeURIComponent(url);
+    } catch { /* ignore malformed encodings */ }
+
+    url = url.replace(/\$\{AUCTION_PRICE\}/g, String(bid.cpm));
+    new Image().src = url;
+  }
+};
+
+registerBidder(spec);
diff --git a/modules/tezaBidAdapter.md b/modules/tezaBidAdapter.md
new file mode 100644
index 00000000000..556285828da
--- /dev/null
+++ b/modules/tezaBidAdapter.md
@@ -0,0 +1,41 @@
+# Overview
+
+```
+Module Name: Teza Bidder Adapter
+Module Type: Bidder Adapter
+```
+
+# Description
+
+Minimal banner-only adapter for an OpenRTB 2.x endpoint.
+
+### Bid params
+
+| Name          | Scope    | Description                                                                 | Example    | Type      |
+| ------------- | -------- | --------------------------------------------------------------------------- | ---------- | --------- |
+| `account`     | required | Account identifier provided by Teza.                                        | `acct123`  | `string`  |
+| `tagid`       | optional | Ad placement identifier; falls back to GPID or `adUnitCode` if not present. | `home-top` | `string`  |
+| `bidfloor`    | optional | Minimum price to bid. Default `0.01`.                                       | `0.10`     | `number`  |
+| `bidfloorcur` | optional | Currency for `bidfloor`. Default `USD`.                                     | `USD`      | `string`  |
+| `test`        | optional | When `true`, enables test mode (`test=1`) on requests.                      | `true`     | `boolean` |
+
+# Test Parameters
+
+```js
+var adUnits = [
+  {
+    code: "div-1",
+    mediaTypes: { banner: { sizes: [[300, 250]] } },
+    bids: [
+      {
+        bidder: "teza",
+        params: {
+          account: "acct123",
+          bidfloor: 0.1,
+          test: true,
+        },
+      },
+    ],
+  },
+];
+```
diff --git a/test/spec/modules/tezaBidAdapter_spec.js b/test/spec/modules/tezaBidAdapter_spec.js
new file mode 100644
index 00000000000..2147eb0e8a5
--- /dev/null
+++ b/test/spec/modules/tezaBidAdapter_spec.js
@@ -0,0 +1,190 @@
+// test/spec/modules/tezaBidAdapter_spec.js
+import { expect } from 'chai';
+import { spec } from 'modules/tezaBidAdapter.js';
+
+describe('tezaBidAdapter', function () {
+  const bidderRequest = {
+    auctionId: 'auc-1',
+    timeout: 1200,
+    refererInfo: {
+      domain: 'localhost',
+      page: 'http://localhost/test-teza.html',
+    },
+    gdprConsent: { gdprApplies: true, consentString: 'CONSENT' },
+    uspConsent: '1YNN',
+    gppConsent: { gppString: 'GPPSTRING', applicableSections: [7] },
+    ortb2: {
+      user: { buyeruid: 'u1' },
+      device: { dnt: 0 },
+      site: { cat: ['IAB1'] },
+    },
+  };
+
+  const validBid = {
+    bidder: 'teza',
+    bidId: 'bid-1',
+    adUnitCode: 'div-1',
+    params: { tagid: 'atagid', account: 'acct123', test: true },
+    schain: { ver: '1.0', complete: 1, nodes: [] },
+    userIdAsEids: [{ source: 'uid.example', uids: [{ id: 'abc' }] }],
+    mediaTypes: {
+      banner: {
+        sizes: [
+          [300, 250],
+          [320, 50],
+        ],
+      },
+    },
+  };
+
+  describe('isBidRequestValid', function () {
+    it('returns true when tagid and account exist', function () {
+      expect(spec.isBidRequestValid(validBid)).to.equal(true);
+    });
+    it('returns false when missing account', function () {
+      const b = { ...validBid, params: { tagid: 'atagid' } };
+      expect(spec.isBidRequestValid(b)).to.equal(false);
+    });
+  });
+
+  describe('buildRequests', function () {
+    it('builds POST with account & test on query and expected ORTB fields', function () {
+      const req = spec.buildRequests([validBid], bidderRequest);
+      expect(req.method).to.equal('POST');
+      expect(req.url).to.match(
+        /^https?:\/\/[^\s]+openrtb2\/auction\?test=1&account=acct123$/
+      );
+      expect(req.data).to.be.an('object');
+
+      const ortb = req.data;
+      expect(ortb.id).to.equal('auc-1');
+      expect(ortb.cur).to.deep.equal(['USD']);
+      expect(ortb.test).to.equal(1);
+
+      // site
+      expect(ortb.site.domain).to.equal('localhost');
+      expect(ortb.site.page).to.match(/http:\/\/localhost\/test-teza\.html/);
+
+      // imp
+      expect(ortb.imp).to.have.length(1);
+      expect(ortb.imp[0].tagid).to.equal('atagid');
+      expect(ortb.imp[0].banner.format).to.deep.equal([
+        { w: 300, h: 250 },
+        { w: 320, h: 50 },
+      ]);
+
+      // user/device/regs
+      expect(ortb.device).to.be.an('object');
+      expect(ortb.user.ext.consent).to.equal('CONSENT');
+      expect(ortb.user.ext.eids).to.be.an('array').with.length(1);
+      expect(ortb.regs.ext.gdpr).to.equal(1);
+      expect(ortb.regs.ext.us_privacy).to.equal('1YNN');
+      expect(ortb.regs.gpp).to.equal('GPPSTRING');
+      expect(ortb.regs.gpp_sid).to.deep.equal([7]);
+
+      // schain
+      expect(ortb.source.ext.schain).to.be.an('object');
+    });
+  });
+
+  describe('interpretResponse', function () {
+    it('maps OpenRTB seatbid to Prebid bids', function () {
+      const serverResponse = {
+        body: {
+          id: 'resp-1',
+          cur: 'USD',
+          seatbid: [
+            {
+              seat: 'teza',
+              bid: [
+                {
+                  id: 'b1',
+                  impid: 'bid-1',
+                  price: 0.5,
+                  w: 300,
+                  h: 250,
+                  crid: 'cr1',
+                  adm: '<div>ad</div>',
+                  adomain: ['example.com'],
+                  nurl: 'https://dsp/win?price=${AUCTION_PRICE}',
+                  burl: 'https://dsp/beacon?price=${AUCTION_PRICE}',
+                },
+              ],
+            },
+          ],
+        },
+      };
+      const out = spec.interpretResponse(serverResponse, {});
+      expect(out).to.have.length(1);
+      const b = out[0];
+      expect(b.requestId).to.equal('bid-1');
+      expect(b.cpm).to.equal(0.5);
+      expect(b.width).to.equal(300);
+      expect(b.height).to.equal(250);
+      expect(b.creativeId).to.equal('cr1');
+      expect(b.ad).to.match(/<div>ad<\/div>/);
+      expect(b.meta.advertiserDomains).to.deep.equal(['example.com']);
+      expect(b.nurl).to.be.a('string');
+      expect(b.burl).to.be.a('string');
+    });
+  });
+
+  describe('onBidWon', function () {
+    let OriginalImage;
+    let fired;
+
+    beforeEach(function () {
+      fired = [];
+      OriginalImage = global.Image;
+
+      // Mock with getter+setter to satisfy eslint accessor-pairs
+      global.Image = class {
+        constructor() {
+          this._src = '';
+        }
+        get src() {
+          return this._src;
+        }
+        set src(url) {
+          this._src = url;
+          fired.push(url);
+        }
+      };
+    });
+
+    afterEach(function () {
+      global.Image = OriginalImage;
+    });
+
+    it('pings burl (falls back to nurl) with cleared AUCTION_PRICE macro', function () {
+      const bid = {
+        burl: 'https://dsp/beacon?price=${AUCTION_PRICE}',
+        nurl: 'https://dsp/win?price=${AUCTION_PRICE}',
+        cpm: 1.23,
+      };
+      spec.onBidWon(bid);
+      expect(fired).to.have.length(1);
+      expect(fired[0]).to.equal('https://dsp/beacon?price=1.23');
+    });
+
+    it('uses nurl when burl absent', function () {
+      const bid = { nurl: 'https://dsp/win?price=${AUCTION_PRICE}', cpm: 0.5 };
+      spec.onBidWon(bid);
+      expect(fired[0]).to.equal('https://dsp/win?price=0.5');
+    });
+
+    it('does nothing when neither url is present', function () {
+      const bid = { cpm: 0.5 };
+      spec.onBidWon(bid);
+      expect(fired).to.have.length(0);
+    });
+
+    describe('alias', function () {
+      it('works under alias', function () {
+        const vb = { ...validBid, bidder: 'tezaAlias' }; // reuse scoped validBid
+        const req = spec.buildRequests([vb], bidderRequest);
+        expect(req.url).to.match(/openrtb2\/auction\?test=1&account=acct123$/);
+      });
+    });
+  });
+});