diff --git a/sso-mfa/k8s/keycape/README.md b/sso-mfa/k8s/keycape/README.md
index fd05f03..b3b711b 100644
--- a/sso-mfa/k8s/keycape/README.md
+++ b/sso-mfa/k8s/keycape/README.md
@@ -128,22 +128,21 @@ kubectl rollout restart deployment/keycape -n sso
 ```
 
 The `openbao-admin` client is intentionally a public PKCE client for the
-current operator flow. It registers both the OpenBao CLI callback URIs and the
-browser UI callbacks for `bao.coulomb.social`:
+current operator flow. It registers the OpenBao CLI callback URIs and the
+operator-tunneled browser UI callback:
 
 ```text
 http://localhost:8250/oidc/callback
 http://127.0.0.1:8250/oidc/callback
 http://127.0.0.1:18200/ui/vault/auth/netkingdom/oidc/callback
-https://bao.coulomb.social/ui/vault/auth/netkingdom/oidc/callback
-https://bao.coulomb.social/ui/vault/auth/keycape/oidc/callback
 ```
 
-The preferred browser UI callback is paired with the named Railiance Platform
-operator tunnel at `http://127.0.0.1:18200`. The public callback remains during
-the bounded listener rollback window. The preferred browser auth mount is
-`netkingdom`; `keycape` remains a compatibility alias. Keep the CLI callbacks
-unless there is a separate decision to retire CLI login.
+The browser UI callback is paired with the named Railiance Platform operator
+tunnel at `http://127.0.0.1:18200`. The public `bao.coulomb.social` callbacks
+were retired with that name on 2026-09-15; `openbao-client-config.py` and
+`verify-t07.sh` fail if either is registered again. The preferred browser auth
+mount is `netkingdom`; `keycape` remains a compatibility alias. Keep the CLI
+callbacks unless there is a separate decision to retire CLI login.
 
 To add or refresh only the OpenBao client in a live cluster, do not decrypt the
 bootstrap secret bundle and do not re-run the full secret generator. Patch the
diff --git a/sso-mfa/k8s/keycape/create-secrets.sh b/sso-mfa/k8s/keycape/create-secrets.sh
index 3f26c3d..54ae5e4 100644
--- a/sso-mfa/k8s/keycape/create-secrets.sh
+++ b/sso-mfa/k8s/keycape/create-secrets.sh
@@ -140,8 +140,6 @@ clients:
       - "http://localhost:8250/oidc/callback"
       - "http://127.0.0.1:8250/oidc/callback"
       - "http://127.0.0.1:18200/ui/vault/auth/netkingdom/oidc/callback"
-      - "https://bao.coulomb.social/ui/vault/auth/netkingdom/oidc/callback"
-      - "https://bao.coulomb.social/ui/vault/auth/keycape/oidc/callback"
     allowedScopes: ["openid", "profile", "email", "groups"]
     grantTypes: ["authorization_code"]
     clientType: "public"
diff --git a/sso-mfa/k8s/keycape/openbao-client-config.py b/sso-mfa/k8s/keycape/openbao-client-config.py
index 80899bb..9ed3562 100644
--- a/sso-mfa/k8s/keycape/openbao-client-config.py
+++ b/sso-mfa/k8s/keycape/openbao-client-config.py
@@ -31,14 +31,18 @@ OPENBAO_CLIENT = {
         "http://localhost:8250/oidc/callback",
         "http://127.0.0.1:8250/oidc/callback",
         "http://127.0.0.1:18200/ui/vault/auth/netkingdom/oidc/callback",
-        "https://bao.coulomb.social/ui/vault/auth/netkingdom/oidc/callback",
-        "https://bao.coulomb.social/ui/vault/auth/keycape/oidc/callback",
     ],
     "allowedScopes": ["openid", "profile", "email", "groups"],
     "grantTypes": ["authorization_code"],
     "clientType": "public",
 }
 
+# bao.coulomb.social was retired on 2026-09-15; its callbacks must not return.
+RETIRED_OPENBAO_REDIRECT_URIS = (
+    "https://bao.coulomb.social/ui/vault/auth/netkingdom/oidc/callback",
+    "https://bao.coulomb.social/ui/vault/auth/keycape/oidc/callback",
+)
+
 RAPP_QONTO_CLIENT = {
     "clientId": "rapp-qonto-client",
     "displayName": "rapp-qonto workload",
@@ -223,6 +227,16 @@ def client_errors(config: dict[str, Any], required: dict[str, Any]) -> list[str]
     return errors
 
 
+def retired_redirect_errors(config: dict[str, Any]) -> list[str]:
+    clients = config.get("clients") if isinstance(config.get("clients"), list) else []
+    target = next(
+        (client for client in clients if isinstance(client, dict) and client.get("clientId") == OPENBAO_CLIENT["clientId"]),
+        {},
+    )
+    retired = sorted(set(RETIRED_OPENBAO_REDIRECT_URIS) & set(target.get("redirectUris") or []))
+    return [f"{OPENBAO_CLIENT['clientId']}.redirectUris retired: {', '.join(retired)}"] if retired else []
+
+
 def upsert_client(config: dict[str, Any], required: dict[str, Any]) -> dict[str, Any]:
     clients = config.get("clients")
     if not isinstance(clients, list):
@@ -265,7 +279,7 @@ def render_patch(config: dict[str, Any]) -> None:
 
 
 def verify(config: dict[str, Any]) -> None:
-    errors = client_errors(config, OPENBAO_CLIENT) + client_errors(config, RAPP_QONTO_CLIENT) + lldap_errors(config)
+    errors = client_errors(config, OPENBAO_CLIENT) + client_errors(config, RAPP_QONTO_CLIENT) + retired_redirect_errors(config) + lldap_errors(config)
     if errors:
         for error in errors:
             print(f"[FAIL] {error}")
diff --git a/sso-mfa/k8s/keycape/test_openbao_client_config.py b/sso-mfa/k8s/keycape/test_openbao_client_config.py
index f3f644f..2d75c77 100644
--- a/sso-mfa/k8s/keycape/test_openbao_client_config.py
+++ b/sso-mfa/k8s/keycape/test_openbao_client_config.py
@@ -32,6 +32,25 @@ class OpenBaoClientConfigTest(unittest.TestCase):
             [f"openbao-admin.redirectUris missing: {LOOPBACK_CALLBACK}"],
         )
 
+    def test_retired_public_callbacks_are_not_declared(self) -> None:
+        for uri in MODULE.RETIRED_OPENBAO_REDIRECT_URIS:
+            self.assertNotIn(uri, MODULE.OPENBAO_CLIENT["redirectUris"])
+
+    def test_retired_public_callback_fails_verification(self) -> None:
+        client = dict(MODULE.OPENBAO_CLIENT)
+        retired = MODULE.RETIRED_OPENBAO_REDIRECT_URIS[0]
+        client["redirectUris"] = [*MODULE.OPENBAO_CLIENT["redirectUris"], retired]
+        self.assertEqual(
+            MODULE.retired_redirect_errors({"clients": [client]}),
+            [f"openbao-admin.redirectUris retired: {retired}"],
+        )
+
+    def test_upsert_removes_retired_callbacks(self) -> None:
+        stale = dict(MODULE.OPENBAO_CLIENT)
+        stale["redirectUris"] = [*MODULE.OPENBAO_CLIENT["redirectUris"], *MODULE.RETIRED_OPENBAO_REDIRECT_URIS]
+        updated = MODULE.upsert_client({"clients": [stale]}, MODULE.OPENBAO_CLIENT)
+        self.assertEqual(MODULE.retired_redirect_errors(updated), [])
+
     def test_upsert_preserves_unrelated_clients(self) -> None:
         config = {"clients": [{"clientId": "unrelated", "clientType": "public"}]}
         updated = MODULE.upsert_client(config, MODULE.OPENBAO_CLIENT)
diff --git a/sso-mfa/k8s/keycape/verify-openbao-client.sh b/sso-mfa/k8s/keycape/verify-openbao-client.sh
index 924d19e..c4ee19f 100755
--- a/sso-mfa/k8s/keycape/verify-openbao-client.sh
+++ b/sso-mfa/k8s/keycape/verify-openbao-client.sh
@@ -49,8 +49,6 @@ probe_redirect() {
 
 probe_redirect "CLI" "http://localhost:8250/oidc/callback"
 probe_redirect "operator-tunneled browser UI netkingdom mount" "http://127.0.0.1:18200/ui/vault/auth/netkingdom/oidc/callback"
-probe_redirect "browser UI netkingdom mount" "https://bao.coulomb.social/ui/vault/auth/netkingdom/oidc/callback"
-probe_redirect "browser UI keycape compatibility mount" "https://bao.coulomb.social/ui/vault/auth/keycape/oidc/callback"
 
 KC_POD=$("$KUBECTL" get pod -n "$NAMESPACE" \
   -l app.kubernetes.io/name=keycape \
diff --git a/sso-mfa/k8s/verify-t07.sh b/sso-mfa/k8s/verify-t07.sh
index 911581b..894a09c 100755
--- a/sso-mfa/k8s/verify-t07.sh
+++ b/sso-mfa/k8s/verify-t07.sh
@@ -188,8 +188,6 @@ required_redirects = {
     "http://localhost:8250/oidc/callback",
     "http://127.0.0.1:8250/oidc/callback",
     "http://127.0.0.1:18200/ui/vault/auth/netkingdom/oidc/callback",
-    "https://bao.coulomb.social/ui/vault/auth/netkingdom/oidc/callback",
-    "https://bao.coulomb.social/ui/vault/auth/keycape/oidc/callback",
 }
 required_scopes = {"openid", "profile", "email", "groups"}
 missing_redirects = sorted(required_redirects - set(target.get("redirectUris") or []))
@@ -200,6 +198,13 @@ if target.get("clientType") != "public":
 if missing_redirects:
     print("openbao-admin missing redirect URI(s): " + ", ".join(missing_redirects))
     raise SystemExit(4)
+retired_redirects = sorted({
+    "https://bao.coulomb.social/ui/vault/auth/netkingdom/oidc/callback",
+    "https://bao.coulomb.social/ui/vault/auth/keycape/oidc/callback",
+} & set(target.get("redirectUris") or []))
+if retired_redirects:
+    print("openbao-admin still registers retired redirect URI(s): " + ", ".join(retired_redirects))
+    raise SystemExit(6)
 if missing_scopes:
     print("openbao-admin missing scope(s): " + ", ".join(missing_scopes))
     raise SystemExit(5)