diff --git a/apps/web/src/components/Sidebar.tsx b/apps/web/src/components/Sidebar.tsx
index 22c28df1ce66..28c5e3ae3341 100644
--- a/apps/web/src/components/Sidebar.tsx
+++ b/apps/web/src/components/Sidebar.tsx
@@ -28,7 +28,7 @@ import {
   scopeThreadRef,
   scopedThreadKey,
 } from "@t3tools/client-runtime/environment";
-import type { ScopedThreadRef } from "@t3tools/contracts";
+import type { ScopedThreadRef, ThreadId } from "@t3tools/contracts";
 import type { TimestampFormat } from "@t3tools/contracts/settings";
 import {
   AlarmClockIcon,
@@ -1631,6 +1631,25 @@ export default function Sidebar() {
       );
     },
   });
+  const { copyToClipboard: copyThreadId } = useCopyToClipboard<{ threadId: ThreadId }>({
+    target: "thread ID",
+    onCopy: ({ threadId }) => {
+      toastManager.add({
+        type: "success",
+        title: "Thread ID copied",
+        description: threadId,
+      });
+    },
+    onError: (error) => {
+      toastManager.add(
+        stackedThreadToast({
+          type: "error",
+          title: "Failed to copy thread ID",
+          description: error instanceof Error ? error.message : "An error occurred.",
+        }),
+      );
+    },
+  });
   const [projectScopeMenuOpen, setProjectScopeMenuOpen] = useState(false);
   const newThreadContext = useHandleNewThread();
   const openAddProjectCommandPalette = useCallback(
@@ -3007,6 +3026,9 @@ export default function Sidebar() {
               copyBranchToClipboard(thread.branch, { branch: thread.branch });
             }
             return;
+          case "copy-thread-id":
+            copyThreadId(thread.id, { threadId: thread.id });
+            return;
           case "delete": {
             if (confirmThreadDelete) {
               const confirmed = await settlePromise(() =>
@@ -3049,6 +3071,7 @@ export default function Sidebar() {
       confirmThreadDelete,
       copyBranchToClipboard,
       copyPathToClipboard,
+      copyThreadId,
       deleteThread,
       handleMultiSelectContextMenu,
       markThreadUnread,
diff --git a/apps/web/src/components/threadActionMenu.logic.test.ts b/apps/web/src/components/threadActionMenu.logic.test.ts
index a450b29f2266..93dc653e7c0a 100644
--- a/apps/web/src/components/threadActionMenu.logic.test.ts
+++ b/apps/web/src/components/threadActionMenu.logic.test.ts
@@ -26,7 +26,7 @@ describe("buildThreadActionMenuItems", () => {
         ...baseState,
         supports: { settlement: false, snooze: false, pinning: false, titleRegeneration: false },
       }),
-    ).toEqual(["rename", "mark-unread", "copy-path", "delete"]);
+    ).toEqual(["rename", "mark-unread", "copy-path", "copy-thread-id", "delete"]);
   });
 
   it("includes branch items only for threads with a branch", () => {
diff --git a/apps/web/src/components/threadActionMenu.logic.ts b/apps/web/src/components/threadActionMenu.logic.ts
index 66aaf3debf54..ef4b38dcdacd 100644
--- a/apps/web/src/components/threadActionMenu.logic.ts
+++ b/apps/web/src/components/threadActionMenu.logic.ts
@@ -20,6 +20,7 @@ export type ThreadActionMenuId =
   | "mark-unread"
   | "copy-path"
   | "copy-branch"
+  | "copy-thread-id"
   | "delete";
 
 export interface ThreadActionMenuState {
@@ -100,6 +101,7 @@ export function buildThreadActionMenuItems(
     { id: "mark-unread", label: "Mark unread" },
     { id: "copy-path", label: "Copy path", icon: "copy" },
     ...(state.branch ? [{ id: "copy-branch" as const, label: "Copy branch", icon: "copy" }] : []),
+    { id: "copy-thread-id", label: "Copy thread ID", icon: "copy" },
     { id: "delete", label: "Delete", destructive: true, icon: "trash" },
   ];
 }
diff --git a/apps/web/src/hooks/useThreadActionMenu.ts b/apps/web/src/hooks/useThreadActionMenu.ts
index 24efe4ea1963..316a609fe19e 100644
--- a/apps/web/src/hooks/useThreadActionMenu.ts
+++ b/apps/web/src/hooks/useThreadActionMenu.ts
@@ -11,7 +11,7 @@ import {
   effectiveSnoozed,
   type ChangeRequestStateLike,
 } from "@t3tools/client-runtime/state/thread-settled";
-import type { ScopedThreadRef } from "@t3tools/contracts";
+import type { ScopedThreadRef, ThreadId } from "@t3tools/contracts";
 import { useCallback } from "react";
 
 import { resolveSnoozePresets, snoozeWakeDescription } from "../components/Sidebar.snooze";
@@ -95,6 +95,13 @@ export function useThreadActionMenu(input: {
     },
     onError: (error) => failureToast("Failed to copy branch", error),
   });
+  const { copyToClipboard: copyThreadId } = useCopyToClipboard<{ threadId: ThreadId }>({
+    target: "thread ID",
+    onCopy: ({ threadId }) => {
+      toastManager.add({ type: "success", title: "Thread ID copied", description: threadId });
+    },
+    onError: (error) => failureToast("Failed to copy thread ID", error),
+  });
 
   const openMenu = useCallback(
     (position: { x: number; y: number }) => {
@@ -242,6 +249,9 @@ export function useThreadActionMenu(input: {
               copyBranchToClipboard(thread.branch, { branch: thread.branch });
             }
             return;
+          case "copy-thread-id":
+            copyThreadId(threadRef.threadId, { threadId: threadRef.threadId });
+            return;
           case "delete": {
             if (confirmThreadDelete) {
               const confirmed = await settlePromise(() =>
@@ -279,6 +289,7 @@ export function useThreadActionMenu(input: {
       confirmThreadDelete,
       copyBranchToClipboard,
       copyPathToClipboard,
+      copyThreadId,
       deleteThread,
       handleNewThread,
       markThreadUnread,