diff --git a/apps/web/playwright/embed-code-generator.e2e.ts b/apps/web/playwright/embed-code-generator.e2e.ts
index 28a0b4b7c2..f7ced620e0 100644
--- a/apps/web/playwright/embed-code-generator.e2e.ts
+++ b/apps/web/playwright/embed-code-generator.e2e.ts
@@ -424,6 +424,10 @@ async function expectValidHtmlEmbedSnippet(
     expect(embedCode).toContain(orgSlug);
   }
 
+  // Html/VanillaJS embed needs namespace to call an instruction
+  // Verify Cal.ns.abc("ui") or Cal.ns["abc"]("ui")
+  expect(embedCode).toMatch(/.*Cal\.ns[^(]+\("ui/);
+
   const dom = parse(embedCode);
   const scripts = dom.getElementsByTagName("script");
   assertThatCodeIsValidVanillaJsCode(scripts[0].innerText);
@@ -492,6 +496,8 @@ async function expectValidReactEmbedSnippet(
   expect(embedCode).toContain(
     embedType === "floating-popup" ? "floatingButton" : embedType === "inline" ? `<Cal` : "data-cal-link"
   );
+  // React embed doesn't need to access .ns to call an instruction
+  expect(embedCode).toContain('cal("ui"');
   if (orgSlug) {
     expect(embedCode).toContain(orgSlug);
   }
diff --git a/packages/features/embed/lib/EmbedCodes.tsx b/packages/features/embed/lib/EmbedCodes.tsx
index 7ef08f026a..07d6f75320 100644
--- a/packages/features/embed/lib/EmbedCodes.tsx
+++ b/packages/features/embed/lib/EmbedCodes.tsx
@@ -2,7 +2,7 @@ import { WEBSITE_URL, IS_SELF_HOSTED, WEBAPP_URL } from "@calcom/lib/constants";
 
 import type { PreviewState } from "../types";
 import { embedLibUrl } from "./constants";
-import { getApiName } from "./getApiName";
+import { getApiNameForReactSnippet, getApiNameForVanillaJsSnippet } from "./getApiName";
 import { getDimension } from "./getDimension";
 
 export const doWeNeedCalOriginProp = (embedCalOrigin: string) => {
@@ -67,7 +67,7 @@ export const Codes = {
 	useEffect(()=>{
 	  (async function () {
 		const cal = await getCalApi(${argumentForGetCalApi ? JSON.stringify(argumentForGetCalApi) : ""});
-		${getApiName({ namespace, mainApiName: "cal" })}("floatingButton", ${floatingButtonArg});
+		${getApiNameForReactSnippet({ mainApiName: "cal" })}("floatingButton", ${floatingButtonArg});
 		${uiInstructionCode}
 	  })();
 	}, [])
@@ -119,7 +119,7 @@ export const Codes = {
       previewState: PreviewState;
       namespace: string;
     }) => {
-      return code`${getApiName({ namespace })}("inline", {
+      return code`${getApiNameForVanillaJsSnippet({ namespace, mainApiName: "Cal" })}("inline", {
 	elementOrSelector:"#my-cal-inline",
 	calLink: "${calLink}",
 	layout: "${previewState.layout}"
@@ -137,7 +137,10 @@ export const Codes = {
       uiInstructionCode: string;
       namespace: string;
     }) => {
-      return code`${getApiName({ namespace, mainApiName: "Cal" })}("floatingButton", ${floatingButtonArg});
+      return code`${getApiNameForVanillaJsSnippet({
+        namespace,
+        mainApiName: "Cal",
+      })}("floatingButton", ${floatingButtonArg});
   ${uiInstructionCode}`;
     },
     "element-click": ({
diff --git a/packages/features/embed/lib/EmbedTabs.tsx b/packages/features/embed/lib/EmbedTabs.tsx
index 913b5277f6..1f131ba363 100644
--- a/packages/features/embed/lib/EmbedTabs.tsx
+++ b/packages/features/embed/lib/EmbedTabs.tsx
@@ -10,7 +10,7 @@ import { TextArea } from "@calcom/ui";
 import type { EmbedFramework, EmbedType, PreviewState } from "../types";
 import { Codes, doWeNeedCalOriginProp } from "./EmbedCodes";
 import { embedLibUrl, EMBED_PREVIEW_HTML_URL } from "./constants";
-import { getApiName } from "./getApiName";
+import { getApiNameForReactSnippet, getApiNameForVanillaJsSnippet } from "./getApiName";
 import { getDimension } from "./getDimension";
 import { useEmbedCalOrigin } from "./hooks";
 
@@ -181,7 +181,7 @@ const getEmbedTypeSpecificString = ({
   };
   if (embedFramework === "react") {
     uiInstructionStringArg = {
-      apiName: getApiName({ namespace, mainApiName: "cal" }),
+      apiName: getApiNameForReactSnippet({ mainApiName: "cal" }),
       theme: previewState.theme,
       brandColor: previewState.palette.brandColor,
       hideEventTypeDetails: previewState.hideEventTypeDetails,
@@ -189,7 +189,7 @@ const getEmbedTypeSpecificString = ({
     };
   } else {
     uiInstructionStringArg = {
-      apiName: getApiName({ namespace, mainApiName: "Cal" }),
+      apiName: getApiNameForVanillaJsSnippet({ namespace, mainApiName: "Cal" }),
       theme: previewState.theme,
       brandColor: previewState.palette.brandColor,
       hideEventTypeDetails: previewState.hideEventTypeDetails,
diff --git a/packages/features/embed/lib/getApiName.test.tsx b/packages/features/embed/lib/getApiName.test.tsx
new file mode 100644
index 0000000000..2306c89b90
--- /dev/null
+++ b/packages/features/embed/lib/getApiName.test.tsx
@@ -0,0 +1,28 @@
+import { describe, it, expect } from "vitest";
+
+import { getApiNameWithNamespace } from "./getApiName";
+
+describe("getApiNameWithNamespace", () => {
+  describe("when namespace is a valid variable", () => {
+    it("should return the correct API name with namespace for a non-hyphenated namespace", () => {
+      const result = getApiNameWithNamespace({ namespace: "first", mainApiName: "cal" });
+      expect(result).toBe("cal.ns.first");
+    });
+    it("should return the correct API name with namespace for a$b", () => {
+      const result = getApiNameWithNamespace({ namespace: "a$b", mainApiName: "cal" });
+      expect(result).toBe("cal.ns.a$b");
+    });
+  });
+
+  describe("when namespace is not a valid variable", () => {
+    it("should return the correct API name with namespace for a hyphenated namespace", () => {
+      const result = getApiNameWithNamespace({ namespace: "first-one", mainApiName: "cal" });
+      expect(result).toBe('cal.ns["first-one"]');
+    });
+
+    it("should return the correct API name with namespace for a&n", () => {
+      const result = getApiNameWithNamespace({ namespace: "a&n", mainApiName: "cal" });
+      expect(result).toBe('cal.ns["a&n"]');
+    });
+  });
+});
diff --git a/packages/features/embed/lib/getApiName.tsx b/packages/features/embed/lib/getApiName.tsx
index 17a0013ab4..5c9e891570 100644
--- a/packages/features/embed/lib/getApiName.tsx
+++ b/packages/features/embed/lib/getApiName.tsx
@@ -1,14 +1,29 @@
-export function getApiName({
+export function getApiNameWithNamespace({
   namespace,
-  mainApiName = "Cal",
+  mainApiName,
 }: {
-  namespace: string | null;
-  mainApiName?: string;
+  namespace: string;
+  mainApiName: string;
 }) {
-  if (!namespace) {
-    return mainApiName;
-  }
   const isAValidVariableName = /^[a-zA-Z_$][a-zA-Z_$0-9]*$/.test(namespace);
   // Try to use dot notation if possible because it's more readable otherwise use bracket notation
   return isAValidVariableName ? `${mainApiName}.ns.${namespace}` : `${mainApiName}.ns["${namespace}"]`;
 }
+
+function getApiNameWithoutNamespace({ mainApiName }: { mainApiName: string }) {
+  return mainApiName;
+}
+
+export function getApiNameForReactSnippet({ mainApiName }: { mainApiName: string }) {
+  return getApiNameWithoutNamespace({ mainApiName });
+}
+
+export function getApiNameForVanillaJsSnippet({
+  namespace,
+  mainApiName,
+}: {
+  namespace: string;
+  mainApiName: string;
+}) {
+  return getApiNameWithNamespace({ mainApiName, namespace });
+}