diff --git a/.changeset/fiery-colts-send.md b/.changeset/fiery-colts-send.md
new file mode 100644
index 0000000..1686e8c
--- /dev/null
+++ b/.changeset/fiery-colts-send.md
@@ -0,0 +1,5 @@
+---
+"google-workspace-developer-tools": patch
+---
+
+Add Apps Script specific `https://www.googleapis.com/auth/script.external_request` which is not part of any API.
diff --git a/packages/vscode-extension/src/scopes.ts b/packages/vscode-extension/src/scopes.ts
index 2ed37ec..597e522 100644
--- a/packages/vscode-extension/src/scopes.ts
+++ b/packages/vscode-extension/src/scopes.ts
@@ -64,6 +64,14 @@ for (const { title, version, documentationLink, scopes } of GOOGLE_APIS || []) {
 	}
 }
 
+export const SCRIPT_EXTERNAL_REQUEST_SCOPE =
+	"https://www.googleapis.com/auth/script.external_request";
+
+SCOPES.set(SCRIPT_EXTERNAL_REQUEST_SCOPE, {
+	description: "Connect to an external service",
+	apis: [],
+});
+
 const RESTRICTED_SCOPES = [
 	"https://www.googleapis.com/auth/chat.admin.delete",
 	"https://www.googleapis.com/auth/chat.app.delete",
diff --git a/packages/vscode-extension/src/test/scopes.test.ts b/packages/vscode-extension/src/test/scopes.test.ts
index daa28e9..7c4aab6 100644
--- a/packages/vscode-extension/src/test/scopes.test.ts
+++ b/packages/vscode-extension/src/test/scopes.test.ts
@@ -15,7 +15,11 @@
  */
 
 import * as assert from "node:assert";
-import { SCOPES, getScopeMarkdown } from "../scopes.js";
+import {
+	SCOPES,
+	SCRIPT_EXTERNAL_REQUEST_SCOPE,
+	getScopeMarkdown,
+} from "../scopes.js";
 
 suite("getScopeMarkdown", () => {
 	test("it returns markdown for a known scope", () => {
@@ -27,4 +31,10 @@ suite("getScopeMarkdown", () => {
 		const markdown = getScopeMarkdown("https://example.com");
 		assert.strictEqual(markdown, "**https://example.com** (Unknown scope)");
 	});
+
+	test("it returns scope for script.external_request", () => {
+		const scope = SCOPES.get(SCRIPT_EXTERNAL_REQUEST_SCOPE);
+		assert.ok(scope);
+		assert.strictEqual(scope?.description, "Connect to an external service");
+	});
 });