diff --git a/README.md b/README.md
index d500d08..9e783fc 100644
--- a/README.md
+++ b/README.md
@@ -239,6 +239,8 @@ Design: **Authentik authenticates once for the whole domain; Caddy authorizes pe
    the matching access on next login; removing it removes it.
    copyparty additionally requires a header with a secret name that only Caddy adds (`idp-h-key`,
    `COPYPARTY_IDP_KEY` in `.env`), so identity headers cannot be forged even if copyparty were reached directly.
+   Logout: copyparty's logout link and the live portal's "Sign out" go to `/outpost.goauthentik.io/sign_out`,
+   which ends the Authentik session (a local app logout alone would be undone on the next request).
 5. Debug: `https://HOST/whoami` prints the username/groups headers exactly as the apps receive them.
    Group changes in Authentik apply on the next login — log out at `https://auth.HOST/` and back in.
 6. Test in a private window: `https://live.HOST/` → Discord login → portal; `https://bot.HOST/` → 403 unless
diff --git a/configure.py b/configure.py
index cb6ad46..642d81e 100755
--- a/configure.py
+++ b/configure.py
@@ -398,6 +398,7 @@ def write_copyparty():
   idp-h-usr: X-Authentik-Username
   idp-h-grp: X-Authentik-Groups
   idp-h-key: X-Vanguard-{key}     # header Caddy inserts on every request; IdP headers are ignored without it
+  idp-logout: /outpost.goauthentik.io/sign_out   # copyparty's logout link ends the Authentik session (not just its own cookie)
   no-robots
   name: vanguard
 
diff --git a/live/src/App.jsx b/live/src/App.jsx
index 52564e3..d3c121e 100644
--- a/live/src/App.jsx
+++ b/live/src/App.jsx
@@ -59,6 +59,7 @@ export default function App() {
         <button onClick={() => audio.muteAll()} title="mute every window until you click one">Mute all</button>
         <button onClick={() => audio.followFocus()} title="clear pinned audio; only the focused window plays sound">Follow focus</button>
         <button className="golive-btn" onClick={() => { audio.muteAll(); apiRef.current = null; setMode('golive') }} title="stop watching and broadcast a window from this browser">Go Live</button>
+        <a className="signout" href="/outpost.goauthentik.io/sign_out" title="sign out of Discord login for all Vanguard sites">Sign out</a>
       </div>
       {mode === 'golive' ? (
         <GoLive onExit={() => { audio.followFocus(); setMode('watch') }} />
diff --git a/live/src/styles.css b/live/src/styles.css
index 4abe013..cf2d6ee 100644
--- a/live/src/styles.css
+++ b/live/src/styles.css
@@ -56,3 +56,5 @@ html, body, #root { height:100%; margin:0; background:var(--bg); color:var(--fg)
 .golive-form .warn-box { background:#3a2a10; border:1px solid #f1c40f; color:#ffe9a8; border-radius:8px; padding:10px 12px; font-size:13px; line-height:1.5; }
 .golive-form .warn-box b { color:#fff; }
 .golive-stats .rec { background:#f1c40f; color:#000; font-weight:700; font-size:11px; padding:2px 6px; border-radius:4px; }
+.topbar a.signout { color:var(--mut); font-size:13px; text-decoration:none; border:1px solid #3a3a3a; border-radius:6px; padding:5px 10px; }
+.topbar a.signout:hover { color:var(--fg); border-color:#666; }