diff --git a/src/components/ConfigModal.tsx b/src/components/ConfigModal.tsx
index 7033309..6043bf8 100644
--- a/src/components/ConfigModal.tsx
+++ b/src/components/ConfigModal.tsx
@@ -13,7 +13,6 @@ import {
   App,
 } from "antd";
 import { PlusOutlined, DeleteOutlined } from "@ant-design/icons";
-import { useDebouncedCallback } from "use-debounce";
 import { createConfig, updateConfig } from "@/services/config";
 import {
   getModrinthLoaders,
@@ -25,6 +24,8 @@ import {
   readProjectVersion,
   checkArtifactFiles,
   checkSourceFiles,
+  lookupModrinthProject,
+  lookupCurseforgeProject,
 } from "@/services/project";
 import {
   useFieldValidations,
@@ -137,6 +138,32 @@ const STATIC_DEFS: StaticValidationDef<Config>[] = [
         : { status: "error", help: r.error };
     },
   },
+  // 5. Modrinth 项目 ID
+  {
+    target: ["modrinth", "project_id"],
+    deps: [["modrinth", "project_id"]],
+    async validate(getVal) {
+      const id = getVal(["modrinth", "project_id"]) as string | undefined;
+      if (!id) return null;
+      const r = await lookupModrinthProject(id);
+      return r.ok
+        ? { status: "success", help: `项目：${r.name}` }
+        : { status: "error", help: r.error };
+    },
+  },
+  // 6. CurseForge 项目 ID
+  {
+    target: ["curseforge", "project_id"],
+    deps: [["curseforge", "project_id"]],
+    async validate(getVal) {
+      const id = getVal(["curseforge", "project_id"]) as number | undefined;
+      if (id == null || id === 0) return null;
+      const r = await lookupCurseforgeProject(id);
+      return r.ok
+        ? { status: "success", help: `项目：${r.name}` }
+        : { status: "error", help: r.error };
+    },
+  },
 ];
 
 const LIST_DEFS: ListValidationDef<Config>[] = [];
@@ -299,29 +326,6 @@ export function ConfigModal({
     [mode, initialName, onSaved, message],
   );
 
-  // --------------- Debounced project name lookup ---------------
-
-  const [modrinthProjectName, setModrinthProjectName] = useState<string | null>(null);
-  const [curseforgeProjectName, setCurseforgeProjectName] = useState<string | null>(null);
-
-  const lookupModrinthProject = useDebouncedCallback(async (projectId: string) => {
-    if (!projectId) {
-      setModrinthProjectName(null);
-      return;
-    }
-    // TODO: call Modrinth API to get project name
-    setModrinthProjectName(null);
-  }, 800);
-
-  const lookupCurseforgeProject = useDebouncedCallback(async (projectId: number | null) => {
-    if (projectId == null) {
-      setCurseforgeProjectName(null);
-      return;
-    }
-    // TODO: call CurseForge API to get project name
-    setCurseforgeProjectName(null);
-  }, 800);
-
   // --------------- Render ---------------
 
   return (
@@ -351,10 +355,6 @@ export function ConfigModal({
       <ConfigModalForm
         mode={mode}
         initialConfig={initialConfig}
-        modrinthProjectName={modrinthProjectName}
-        curseforgeProjectName={curseforgeProjectName}
-        lookupModrinthProject={lookupModrinthProject}
-        lookupCurseforgeProject={lookupCurseforgeProject}
         onSave={handleSave}
       />
     </Modal>
@@ -368,20 +368,12 @@ export function ConfigModal({
 interface ConfigModalFormProps {
   mode: "add" | "edit";
   initialConfig: Config | null;
-  modrinthProjectName: string | null;
-  curseforgeProjectName: string | null;
-  lookupModrinthProject: (projectId: string) => void;
-  lookupCurseforgeProject: (projectId: number | null) => void;
   onSave: (values: ConfigValues) => void;
 }
 
 function ConfigModalForm({
   mode,
   initialConfig,
-  modrinthProjectName,
-  curseforgeProjectName,
-  lookupModrinthProject,
-  lookupCurseforgeProject,
   onSave,
 }: ConfigModalFormProps) {
   const [form] = Form.useForm<ConfigValues>();
@@ -527,23 +519,15 @@ function ConfigModalForm({
               label: "Modrinth",
               children: (
                 <>
-                  <Form.Item
+                  <ValidatedFormItem
                     name={["modrinth", "project_id"]}
                     label="项目 ID"
                     rules={[
                       { required: true, message: "请输入 Modrinth 项目 ID" },
                     ]}
-                    extra={
-                      modrinthProjectName
-                        ? `项目名称: ${modrinthProjectName}`
-                        : undefined
-                    }
                   >
-                    <Input
-                      placeholder="8 位 base62"
-                      onChange={(e) => lookupModrinthProject(e.target.value)}
-                    />
-                  </Form.Item>
+                    <Input placeholder="8 位 base62" />
+                  </ValidatedFormItem>
 
                   <Form.Item
                     name={["modrinth", "version_name"]}
@@ -658,7 +642,7 @@ function ConfigModalForm({
               label: "CurseForge",
               children: (
                 <>
-                  <Form.Item
+                  <ValidatedFormItem
                     name={["curseforge", "project_id"]}
                     label="项目 ID"
                     rules={[
@@ -667,22 +651,12 @@ function ConfigModalForm({
                         message: "请输入 CurseForge 项目 ID",
                       },
                     ]}
-                    extra={
-                      curseforgeProjectName
-                        ? `项目名称: ${curseforgeProjectName}`
-                        : undefined
-                    }
                   >
                     <InputNumber
                       style={{ width: "100%" }}
                       placeholder="数字 ID"
-                      onChange={(val) =>
-                        lookupCurseforgeProject(
-                          typeof val === "number" ? val : null,
-                        )
-                      }
                     />
-                  </Form.Item>
+                  </ValidatedFormItem>
 
                   <Form.Item
                     name={["curseforge", "version_name"]}
diff --git a/src/services/project.ts b/src/services/project.ts
index 3298954..5d09d20 100644
--- a/src/services/project.ts
+++ b/src/services/project.ts
@@ -250,3 +250,33 @@ export async function checkSourceFiles(
   }
   return { ok: true, matched };
 }
+
+// ---------------------------------------------------------------------------
+// 平台项目查询
+// ---------------------------------------------------------------------------
+
+import { getProject } from "@/lib/modrinth/project";
+import { getMod } from "@/lib/curseforge/mod";
+import { modrinthClient, curseforgeClient } from "./clients";
+
+export async function lookupModrinthProject(
+  projectId: string,
+): Promise<OkResult<{ name: string }> | ErrResult> {
+  try {
+    const project = await getProject(modrinthClient, projectId);
+    return { ok: true, name: project.title };
+  } catch (err) {
+    return { ok: false, error: err instanceof Error ? err.message : "查询 Modrinth 项目失败" };
+  }
+}
+
+export async function lookupCurseforgeProject(
+  projectId: number,
+): Promise<OkResult<{ name: string }> | ErrResult> {
+  try {
+    const mod = await getMod(curseforgeClient, projectId);
+    return { ok: true, name: mod.data.name };
+  } catch (err) {
+    return { ok: false, error: err instanceof Error ? err.message : "查询 CurseForge 项目失败" };
+  }
+}