diff --git a/src/components/mcp/McpFormModal.tsx b/src/components/mcp/McpFormModal.tsx
index 4014983..e21e000 100644
--- a/src/components/mcp/McpFormModal.tsx
+++ b/src/components/mcp/McpFormModal.tsx
@@ -4,6 +4,7 @@ import { X, Save, AlertCircle } from "lucide-react";
 import { McpServer } from "../../types";
 import { buttonStyles, inputStyles } from "../../lib/styles";
 import McpWizardModal from "./McpWizardModal";
+import { extractErrorMessage } from "../../utils/errorUtils";
 
 interface McpFormModalProps {
   editingId?: string;
@@ -53,7 +54,41 @@ const McpFormModal: React.FC<McpFormModalProps> = ({
 
   const handleJsonChange = (value: string) => {
     setFormJson(value);
-    setJsonError(validateJson(value));
+
+    // 基础 JSON 校验
+    const baseErr = validateJson(value);
+    if (baseErr) {
+      setJsonError(baseErr);
+      return;
+    }
+
+    // 进一步结构校验：仅允许单个服务器对象，禁止整份配置
+    if (value.trim()) {
+      try {
+        const obj = JSON.parse(value);
+        if (obj && typeof obj === "object") {
+          if (Object.prototype.hasOwnProperty.call(obj, "mcpServers")) {
+            setJsonError(t("mcp.error.singleServerObjectRequired"));
+            return;
+          }
+
+          // 若带有类型，做必填字段提示（不阻止输入，仅给出即时反馈）
+          const typ = (obj as any)?.type;
+          if (typ === "stdio" && !(obj as any)?.command?.trim()) {
+            setJsonError(t("mcp.error.commandRequired"));
+            return;
+          }
+          if (typ === "http" && !(obj as any)?.url?.trim()) {
+            setJsonError(t("mcp.wizard.urlRequired"));
+            return;
+          }
+        }
+      } catch {
+        // 解析异常已在基础校验覆盖
+      }
+    }
+
+    setJsonError("");
   };
 
   const handleWizardApply = (json: string) => {
@@ -81,6 +116,16 @@ const McpFormModal: React.FC<McpFormModalProps> = ({
       if (formJson.trim()) {
         // 解析 JSON 配置
         server = JSON.parse(formJson) as McpServer;
+
+        // 前置必填校验，避免后端拒绝后才提示
+        if (server?.type === "stdio" && !server?.command?.trim()) {
+          alert(t("mcp.error.commandRequired"));
+          return;
+        }
+        if (server?.type === "http" && !server?.url?.trim()) {
+          alert(t("mcp.wizard.urlRequired"));
+          return;
+        }
       } else {
         // 空 JSON 时提供默认值（注意：后端会校验 stdio 需要非空 command / http 需要 url）
         server = {
@@ -98,8 +143,9 @@ const McpFormModal: React.FC<McpFormModalProps> = ({
       // 显式等待父组件保存流程，以便正确处理成功/失败
       await onSave(formId.trim(), server);
     } catch (error: any) {
-      // 将后端错误信息直接提示给用户（例如缺少 command/url 等）
-      const msg = error?.message || t("mcp.error.saveFailed");
+      // 提取后端错误信息（支持 string / {message} / tauri payload）
+      const detail = extractErrorMessage(error);
+      const msg = detail || t("mcp.error.saveFailed");
       alert(msg);
     } finally {
       setSaving(false);
diff --git a/src/components/mcp/McpPanel.tsx b/src/components/mcp/McpPanel.tsx
index 7c861c6..03c3767 100644
--- a/src/components/mcp/McpPanel.tsx
+++ b/src/components/mcp/McpPanel.tsx
@@ -5,6 +5,10 @@ import { McpServer, McpStatus } from "../../types";
 import McpListItem from "./McpListItem";
 import McpFormModal from "./McpFormModal";
 import { ConfirmDialog } from "../ConfirmDialog";
+import { extractErrorMessage } from "../../utils/errorUtils";
+import { mcpPresets } from "../../config/mcpPresets";
+import McpToggle from "./McpToggle";
+import { cardStyles, cn } from "../../lib/styles";
 
 interface McpPanelProps {
   onClose: () => void;
@@ -63,10 +67,16 @@ const McpPanel: React.FC<McpPanelProps> = ({ onClose, onNotify }) => {
   const handleToggle = async (id: string, enabled: boolean) => {
     try {
       const server = servers[id];
-      if (!server) return;
+      let updatedServer: McpServer | null = null;
+      if (server) {
+        updatedServer = { ...server, enabled };
+      } else {
+        const preset = mcpPresets.find((p) => p.id === id);
+        if (!preset) return; // 既不是已安装项也不是预设，忽略
+        updatedServer = { ...(preset.server as McpServer), enabled };
+      }
 
-      const updatedServer = { ...server, enabled };
-      await window.api.upsertClaudeMcpServer(id, updatedServer);
+      await window.api.upsertClaudeMcpServer(id, updatedServer as McpServer);
       await reload();
       onNotify?.(
         enabled ? t("mcp.msg.enabled") : t("mcp.msg.disabled"),
@@ -74,7 +84,12 @@ const McpPanel: React.FC<McpPanelProps> = ({ onClose, onNotify }) => {
         1500,
       );
     } catch (e: any) {
-      onNotify?.(e?.message || t("mcp.error.saveFailed"), "error", 5000);
+      const detail = extractErrorMessage(e);
+      onNotify?.(
+        detail || t("mcp.error.saveFailed"),
+        "error",
+        detail ? 6000 : 5000,
+      );
     }
   };
 
@@ -100,7 +115,12 @@ const McpPanel: React.FC<McpPanelProps> = ({ onClose, onNotify }) => {
           setConfirmDialog(null);
           onNotify?.(t("mcp.msg.deleted"), "success", 1500);
         } catch (e: any) {
-          onNotify?.(e?.message || t("mcp.error.deleteFailed"), "error", 5000);
+          const detail = extractErrorMessage(e);
+          onNotify?.(
+            detail || t("mcp.error.deleteFailed"),
+            "error",
+            detail ? 6000 : 5000,
+          );
         }
       },
     });
@@ -114,7 +134,12 @@ const McpPanel: React.FC<McpPanelProps> = ({ onClose, onNotify }) => {
       setEditingId(null);
       onNotify?.(t("mcp.msg.saved"), "success", 1500);
     } catch (e: any) {
-      onNotify?.(e?.message || t("mcp.error.saveFailed"), "error", 6000);
+      const detail = extractErrorMessage(e);
+      onNotify?.(
+        detail || t("mcp.error.saveFailed"),
+        "error",
+        detail ? 6000 : 5000,
+      );
       // 继续抛出错误，让表单层可以给到直观反馈（避免被更高层遮挡）
       throw e;
     }
@@ -177,34 +202,85 @@ const McpPanel: React.FC<McpPanelProps> = ({ onClose, onNotify }) => {
             <div className="text-center py-12 text-gray-500 dark:text-gray-400">
               {t("mcp.loading")}
             </div>
-          ) : serverEntries.length === 0 ? (
-            <div className="text-center py-12">
-              <div className="w-16 h-16 mx-auto mb-4 bg-gray-100 dark:bg-gray-800 rounded-full flex items-center justify-center">
-                <Server
-                  size={24}
-                  className="text-gray-400 dark:text-gray-500"
-                />
-              </div>
-              <h3 className="text-lg font-medium text-gray-900 dark:text-gray-100 mb-2">
-                {t("mcp.empty")}
-              </h3>
-              <p className="text-gray-500 dark:text-gray-400 text-sm">
-                {t("mcp.emptyDescription")}
-              </p>
-            </div>
           ) : (
-            <div className="space-y-3">
-              {serverEntries.map(([id, server]) => (
-                <McpListItem
-                  key={id}
-                  id={id}
-                  server={server}
-                  onToggle={handleToggle}
-                  onEdit={handleEdit}
-                  onDelete={handleDelete}
-                />
-              ))}
-            </div>
+            (() => {
+              const notInstalledPresets = mcpPresets.filter(
+                (p) => !servers[p.id],
+              );
+              const hasAny =
+                serverEntries.length > 0 || notInstalledPresets.length > 0;
+              if (!hasAny) {
+                return (
+                  <div className="text-center py-12">
+                    <div className="w-16 h-16 mx-auto mb-4 bg-gray-100 dark:bg-gray-800 rounded-full flex items-center justify-center">
+                      <Server
+                        size={24}
+                        className="text-gray-400 dark:text-gray-500"
+                      />
+                    </div>
+                    <h3 className="text-lg font-medium text-gray-900 dark:text-gray-100 mb-2">
+                      {t("mcp.empty")}
+                    </h3>
+                    <p className="text-gray-500 dark:text-gray-400 text-sm">
+                      {t("mcp.emptyDescription")}
+                    </p>
+                  </div>
+                );
+              }
+
+              return (
+                <div className="space-y-3">
+                  {/* 已安装 */}
+                  {serverEntries.map(([id, server]) => (
+                    <McpListItem
+                      key={`installed-${id}`}
+                      id={id}
+                      server={server}
+                      onToggle={handleToggle}
+                      onEdit={handleEdit}
+                      onDelete={handleDelete}
+                    />
+                  ))}
+
+                  {/* 预设（未安装） */}
+                  {notInstalledPresets.map((p) => {
+                    const s = {
+                      ...(p.server as McpServer),
+                      enabled: false,
+                    } as McpServer;
+                    const details = [s.type, s.command, ...(s.args || [])].join(
+                      " · ",
+                    );
+                    return (
+                      <div
+                        key={`preset-${p.id}`}
+                        className={cn(
+                          cardStyles.interactive,
+                          "!p-4 opacity-95",
+                        )}
+                      >
+                        <div className="flex items-center gap-4">
+                          <div className="flex-shrink-0">
+                            <McpToggle
+                              enabled={false}
+                              onChange={(en) => handleToggle(p.id, en)}
+                            />
+                          </div>
+                          <div className="flex-1 min-w-0">
+                            <h3 className="font-medium text-gray-900 dark:text-gray-100 mb-1">
+                              {p.id}
+                            </h3>
+                            <p className="text-sm text-gray-500 dark:text-gray-400 truncate">
+                              {details}
+                            </p>
+                          </div>
+                        </div>
+                      </div>
+                    );
+                  })}
+                </div>
+              );
+            })()
           )}
         </div>
       </div>
diff --git a/src/config/mcpPresets.ts b/src/config/mcpPresets.ts
new file mode 100644
index 0000000..a33c2ee
--- /dev/null
+++ b/src/config/mcpPresets.ts
@@ -0,0 +1,38 @@
+import { McpServer } from "../types";
+
+export type McpPreset = {
+  id: string;
+  name: string;
+  description: string;
+  tags?: string[];
+  server: McpServer;
+  homepage?: string;
+  docs?: string;
+  requiresEnv?: string[];
+};
+
+// 预设库（数据文件，当前未接入 UI，便于后续“一键启用”）
+export const mcpPresets: McpPreset[] = [
+  {
+    id: "github-issues",
+    name: "GitHub Issues",
+    description: "查询与管理 GitHub Issues（示例）",
+    tags: ["productivity", "dev"],
+    server: { type: "http", url: "https://mcp.example.com/github-issues" },
+    docs: "https://example.com/mcp/github-issues",
+    requiresEnv: ["GITHUB_TOKEN"],
+  },
+  {
+    id: "local-notes",
+    name: "本地笔记",
+    description: "访问本地笔记数据库（示例）",
+    tags: ["local"],
+    server: {
+      type: "stdio",
+      command: "/usr/local/bin/notes-mcp",
+      args: ["--db", "~/.notes/notes.db"],
+    },
+  },
+];
+
+export default mcpPresets;
diff --git a/src/i18n/locales/en.json b/src/i18n/locales/en.json
index 5b94499..09dc819 100644
--- a/src/i18n/locales/en.json
+++ b/src/i18n/locales/en.json
@@ -318,6 +318,7 @@
       "idRequired": "Please enter identifier",
       "jsonInvalid": "Invalid JSON format",
       "commandRequired": "Please enter command",
+      "singleServerObjectRequired": "Please paste a single MCP server object (do not include top-level mcpServers)",
       "saveFailed": "Save failed",
       "deleteFailed": "Delete failed"
     },
@@ -328,6 +329,14 @@
     "confirm": {
       "deleteTitle": "Delete MCP Server",
       "deleteMessage": "Are you sure you want to delete MCP server \"{{id}}\"? This action cannot be undone."
+    },
+    "presets": {
+      "title": "Presets",
+      "enable": "Enable",
+      "enabled": "Enabled",
+      "installed": "Installed",
+      "docs": "Docs",
+      "requiresEnv": "Requires env"
     }
   }
 }
diff --git a/src/i18n/locales/zh.json b/src/i18n/locales/zh.json
index d0bc287..6daf1de 100644
--- a/src/i18n/locales/zh.json
+++ b/src/i18n/locales/zh.json
@@ -318,6 +318,7 @@
       "idRequired": "请填写标识",
       "jsonInvalid": "JSON 格式错误，请检查",
       "commandRequired": "请填写命令",
+      "singleServerObjectRequired": "此处只需单个服务器对象，请不要粘贴包含 mcpServers 的整份配置",
       "saveFailed": "保存失败",
       "deleteFailed": "删除失败"
     },
@@ -328,6 +329,14 @@
     "confirm": {
       "deleteTitle": "删除 MCP 服务器",
       "deleteMessage": "确定要删除 MCP 服务器 \"{{id}}\" 吗？此操作无法撤销。"
+    },
+    "presets": {
+      "title": "预设库",
+      "enable": "启用",
+      "enabled": "已启用",
+      "installed": "已安装",
+      "docs": "文档",
+      "requiresEnv": "需要环境变量"
     }
   }
 }