diff --git a/internal/api/security_regression_test.go b/internal/api/security_regression_test.go
index 7ebf8fdc0..6b4e38d05 100644
--- a/internal/api/security_regression_test.go
+++ b/internal/api/security_regression_test.go
@@ -1500,6 +1500,50 @@ func TestMetadataMutationEndpointsRequireMonitoringWriteScope(t *testing.T) {
 	}
 }
 
+func TestAISettingsReadRequiresSettingsReadScope(t *testing.T) {
+	rawToken := "ai-settings-read-token-123.12345678"
+	record := newTokenRecord(t, rawToken, []string{config.ScopeMonitoringRead}, nil)
+	cfg := newTestConfigWithTokens(t, record)
+	router := NewRouter(cfg, nil, nil, nil, nil, "1.0.0")
+
+	req := httptest.NewRequest(http.MethodGet, "/api/settings/ai", nil)
+	req.Header.Set("X-API-Token", rawToken)
+	rec := httptest.NewRecorder()
+	router.Handler().ServeHTTP(rec, req)
+	if rec.Code != http.StatusForbidden {
+		t.Fatalf("expected 403 for missing settings:read scope, got %d", rec.Code)
+	}
+	if !strings.Contains(rec.Body.String(), config.ScopeSettingsRead) {
+		t.Fatalf("expected missing scope response to mention %q, got %q", config.ScopeSettingsRead, rec.Body.String())
+	}
+}
+
+func TestAISettingsWriteRequiresSettingsWriteScope(t *testing.T) {
+	rawToken := "ai-settings-write-token-123.12345678"
+	record := newTokenRecord(t, rawToken, []string{config.ScopeSettingsRead}, nil)
+	cfg := newTestConfigWithTokens(t, record)
+	router := NewRouter(cfg, nil, nil, nil, nil, "1.0.0")
+
+	paths := []string{
+		"/api/settings/ai/update",
+		"/api/ai/test",
+		"/api/ai/test/openai",
+	}
+
+	for _, path := range paths {
+		req := httptest.NewRequest(http.MethodPost, path, strings.NewReader(`{}`))
+		req.Header.Set("X-API-Token", rawToken)
+		rec := httptest.NewRecorder()
+		router.Handler().ServeHTTP(rec, req)
+		if rec.Code != http.StatusForbidden {
+			t.Fatalf("expected 403 for missing settings:write scope on %s, got %d", path, rec.Code)
+		}
+		if !strings.Contains(rec.Body.String(), config.ScopeSettingsWrite) {
+			t.Fatalf("expected missing scope response to mention %q, got %q", config.ScopeSettingsWrite, rec.Body.String())
+		}
+	}
+}
+
 func TestSecurityOIDCRequiresSettingsWriteScope(t *testing.T) {
 	rawToken := "security-oidc-token-123.12345678"
 	record := newTokenRecord(t, rawToken, []string{config.ScopeSettingsRead}, nil)