diff --git a/3p/integration.js b/3p/integration.js
index 99d75510a309..cbcf7d9f14e0 100644
--- a/3p/integration.js
+++ b/3p/integration.js
@@ -83,6 +83,7 @@ import {aja} from '#ads/vendors/aja';
 import {amoad} from '#ads/vendors/amoad';
 import {aniview} from '#ads/vendors/aniview';
 import {anyclip} from '#ads/vendors/anyclip';
+import {appmonsta} from '#ads/vendors/appmonsta';
 import {appnexus} from '#ads/vendors/appnexus';
 import {appvador} from '#ads/vendors/appvador';
 import {atomx} from '#ads/vendors/atomx';
@@ -367,6 +368,7 @@ register('aja', aja);
 register('amoad', amoad);
 register('aniview', aniview);
 register('anyclip', anyclip);
+register('appmonsta', appmonsta);
 register('appnexus', appnexus);
 register('appvador', appvador);
 register('atomx', atomx);
diff --git a/3p/vendors/appmonsta.js b/3p/vendors/appmonsta.js
new file mode 100644
index 000000000000..642b7b4717f8
--- /dev/null
+++ b/3p/vendors/appmonsta.js
@@ -0,0 +1,12 @@
+// src/polyfills.js must be the first import.
+import '#3p/polyfills';
+
+import {register} from '#3p/3p';
+import {draw3p, init} from '#3p/integration-lib';
+
+import {appmonsta} from '#ads/vendors/appmonsta';
+
+init(window);
+register('appmonsta', appmonsta);
+
+window.draw3p = draw3p;
diff --git a/ads/_config.js b/ads/_config.js
index 81fb78ac60c1..3ef0dda0665c 100755
--- a/ads/_config.js
+++ b/ads/_config.js
@@ -350,6 +350,10 @@ const adConfig = jsonConfiguration({
     renderStartImplemented: true,
   },
 
+  'appmonsta': {
+    preconnect: 'https://ssp.appmonsta.ai',
+  },
+
   'appnexus': {
     prefetch: 'https://acdn.adnxs.com/ast/ast.js',
     preconnect: 'https://ib.adnxs.com',
diff --git a/ads/vendors/appmonsta.js b/ads/vendors/appmonsta.js
new file mode 100644
index 000000000000..253f389dfa20
--- /dev/null
+++ b/ads/vendors/appmonsta.js
@@ -0,0 +1,30 @@
+import {validateData, writeScript} from '#3p/3p';
+
+/**
+ * @param {!Window} global
+ * @param {!Object} data
+ */
+export function appmonsta(global, data) {
+  validateData(data, ['placementId']);
+
+  const {location} = global.context;
+  let url = 'https://ssp.appmonsta.ai?c=b&m=amp';
+
+  const params = [
+    ['placementId', encodeURIComponent(data.placementId)],
+    ['ua', encodeURIComponent(global.navigator?.userAgent)],
+    ['w', data.width],
+    ['h', data.height],
+    ['domain', location.host],
+    ['page', location.pathname],
+    ['secure', location.protocol === 'https:' ? 1 : 0],
+    ['language', global.navigator?.language],
+  ];
+
+  for (let i = 0; i < params.length; i++) {
+    const param = params[i];
+    url = `${url}&${param[0]}=${param[1] ?? ''}`;
+  }
+
+  writeScript(global, url);
+}
diff --git a/ads/vendors/appmonsta.md b/ads/vendors/appmonsta.md
new file mode 100644
index 000000000000..e22783dce9d5
--- /dev/null
+++ b/ads/vendors/appmonsta.md
@@ -0,0 +1,17 @@
+# AppMonsta
+
+## Basic example
+
+```html
+  <amp-ad
+    width="300"
+    height="250"
+    type="appmonsta"
+    data-placement-id="test"
+  >
+  </amp-ad>
+```
+
+### Required parameters
+
+-   `placement-id`: Placement Id
diff --git a/examples/amp-ad/ads.amp.esm.html b/examples/amp-ad/ads.amp.esm.html
index 099256d31ec9..57097bf7b0e3 100644
--- a/examples/amp-ad/ads.amp.esm.html
+++ b/examples/amp-ad/ads.amp.esm.html
@@ -116,6 +116,7 @@
         <option>aja</option>
         <option>amoad</option>
         <option>aniview</option>
+        <option>appmonsta</option>
         <option>appnexus</option>
         <option>appvador</option>
         <option>atomx</option>
@@ -833,6 +834,15 @@ <h2>Aniview</h2>
           data-channelId="5a5f17a728a06102d14c2718">
   </amp-ad>
 
+  <h2>AppMonsta</h2>
+  <amp-ad
+    width="300"
+    height="250"
+    type="appmonsta"
+    data-placement-id="test"
+  >
+  </amp-ad>
+
   <h2>AppNexus with JSON based configuration multi ad</h2>
   <amp-ad width="728" height="90" type="appnexus" data-target="apn_ad_2"
       json='{"pageOpts":{"member": 958}, "adUnits": [{"disablePsa": true, "tagId": 6063968,"sizes": [300,250],"targetId": "apn_ad_1"}, {"tagId": 6063968,"sizes": [728,90],"targetId":"apn_ad_2"}]}'>
diff --git a/examples/amp-ad/ads.amp.html b/examples/amp-ad/ads.amp.html
index 4471866b688f..f125878387f6 100644
--- a/examples/amp-ad/ads.amp.html
+++ b/examples/amp-ad/ads.amp.html
@@ -222,6 +222,7 @@
         <option>andbeyond</option>
         <option>aniview</option>
         <option>anyclip</option>
+        <option>appmonsta</option>
         <option>appnexus</option>
         <option>appvador</option>
         <option>atomx</option>
@@ -812,6 +813,10 @@ <h2>AnyClip</h2>
     data-widgetname="amp_test_autoplay" data-ac-embed-mode="plain" data-ourl="https://anyclip.com/">
   </amp-ad>
 
+  <h2>AppMonsta</h2>
+  <amp-ad width="300" height="250" type="appmonsta" data-placement-id="test">
+  </amp-ad>
+
   <h2>AppNexus with JSON based configuration multi ad</h2>
   <amp-ad width="728" height="90" type="appnexus" data-target="apn_ad_2"
     json='{"pageOpts":{"member": 958}, "adUnits": [{"disablePsa": true, "tagId": 6063968,"sizes": [300,250],"targetId": "apn_ad_1"}, {"tagId": 6063968,"sizes": [728,90],"targetId":"apn_ad_2"}]}'>
diff --git a/extensions/amp-ad/amp-ad.md b/extensions/amp-ad/amp-ad.md
index 5625cd5c0de3..76db900ab8d9 100644
--- a/extensions/amp-ad/amp-ad.md
+++ b/extensions/amp-ad/amp-ad.md
@@ -307,6 +307,7 @@ See [amp-ad rules](validator-amp-ad.protoascii) in the AMP validator specificati
 -   [Andbeyond](../../ads/vendors/andbeyond.md)
 -   [Aniview](../../ads/vendors/aniview.md)
 -   [AnyClip](../../ads/vendors/anyclip.md)
+-   [AppMonsta](../../ads/vendors/appmonsta.md)
 -   [AppNexus](../../ads/vendors/appnexus.md)
 -   [AppVador](../../ads/vendors/appvador.md)
 -   [Atomx](../../ads/vendors/atomx.md)