diff --git a/.gitignore b/.gitignore
index 0653358..96c6419 100644
--- a/.gitignore
+++ b/.gitignore
@@ -148,4 +148,7 @@ coverage/
 .DS_Store
 
 # SSH key for AWS
-jenkins.pem
\ No newline at end of file
+jenkins.pem
+
+# Local change log (Chinese summary)
+change_log_cn.md
diff --git a/client/src/routes/Jenkins.tsx b/client/src/routes/Jenkins.tsx
index a40c3ea..1ffa13e 100644
--- a/client/src/routes/Jenkins.tsx
+++ b/client/src/routes/Jenkins.tsx
@@ -1,16 +1,54 @@
-import { useState } from "react";
+import { useEffect, useState } from "react";
 import { BASE } from "../lib/api";
 
 const SERVER_BASE = BASE.replace(/\/api$/, "");
+const MCP_URL_FALLBACK = "http://192.168.1.35/mcp-server/mcp";
+const MCP_URL_GENERAL_HINT = "Enter the MCP server URL (e.g. https://<host>/mcp-server/mcp)";
 
 export default function Jenkins() {
   const [question, setQuestion] = useState("");
   const [answer, setAnswer] = useState("");
   const [error, setError] = useState<string | null>(null);
   const [loading, setLoading] = useState(false);
+  const [mcpUrl, setMcpUrl] = useState(MCP_URL_FALLBACK);
+  const [jenkinsToken, setJenkinsToken] = useState("");
+  const [mcpUrlHint, setMcpUrlHint] = useState(MCP_URL_FALLBACK);
+  const [tokenHint, setTokenHint] = useState("");
+  const [configError, setConfigError] = useState<string | null>(null);
+
+  useEffect(() => {
+    let isMounted = true;
+    async function loadHints() {
+      try {
+        const res = await fetch(`${SERVER_BASE}/jenkins/config`, {
+          credentials: "include",
+        });
+        if (!res.ok) {
+          throw new Error(res.statusText);
+        }
+        const data = await res.json().catch(() => ({}));
+        if (!isMounted) return;
+        const hintUrl = data?.mcpUrlHint || MCP_URL_FALLBACK;
+        const hintToken = data?.tokenHint || "";
+        setMcpUrlHint(hintUrl);
+        setTokenHint(hintToken);
+        setMcpUrl(hintUrl);
+        setJenkinsToken(hintToken);
+        setConfigError(null);
+      } catch (err: any) {
+        if (!isMounted) return;
+        setConfigError(err?.message || "Unable to load Jenkins defaults");
+      }
+    }
+
+    loadHints();
+    return () => {
+      isMounted = false;
+    };
+  }, []);
 
   async function handleAsk() {
-    if (!question.trim()) return;
+    if (!question.trim() || !mcpUrl.trim() || !jenkinsToken.trim()) return;
     setLoading(true);
     setError(null);
     setAnswer("");
@@ -19,7 +57,11 @@ export default function Jenkins() {
         method: "POST",
         headers: { "Content-Type": "application/json" },
         credentials: "include",
-        body: JSON.stringify({ question: question.trim() }),
+        body: JSON.stringify({
+          question: question.trim(),
+          mcpUrl: mcpUrl.trim() || undefined,
+          token: jenkinsToken.trim() || undefined,
+        }),
       });
       const data = await res.json().catch(() => ({}));
       if (!res.ok) throw new Error((data as any)?.error || res.statusText);
@@ -34,6 +76,32 @@ export default function Jenkins() {
   return (
     <section style={{ display: "grid", gap: 12 }}>
       <h1>Jenkins</h1>
+      <label style={{ display: "grid", gap: 4 }}>
+        <span style={{ fontWeight: 500 }}>MCP URL</span>
+        <input
+          type="text"
+          value={mcpUrl}
+          onChange={(e) => setMcpUrl(e.target.value)}
+          placeholder={MCP_URL_GENERAL_HINT}
+          style={{ width: "100%", padding: 8, fontSize: 14 }}
+        />
+        <span style={{ fontSize: 12, color: "#555" }}>
+          Hint: {MCP_URL_GENERAL_HINT}
+        </span>
+      </label>
+      <label style={{ display: "grid", gap: 4 }}>
+        <span style={{ fontWeight: 500 }}>Jenkins Token</span>
+        <input
+          type="password"
+          value={jenkinsToken}
+          onChange={(e) => setJenkinsToken(e.target.value)}
+          placeholder={tokenHint || "Enter Jenkins token"}
+          style={{ width: "100%", padding: 8, fontSize: 14 }}
+        />
+        <span style={{ fontSize: 12, color: "#555" }}>
+          Hint: {tokenHint ? tokenHint : "Set JENKINS_TOKEN to prefill"}
+        </span>
+      </label>
       <textarea
         rows={4}
         value={question}
@@ -42,7 +110,12 @@ export default function Jenkins() {
         style={{ width: "100%", padding: 8, fontSize: 14 }}
       />
       <div style={{ display: "flex", gap: 8 }}>
-        <button onClick={handleAsk} disabled={loading || !question.trim()}>
+        <button
+          onClick={handleAsk}
+          disabled={
+            loading || !question.trim() || !mcpUrl.trim() || !jenkinsToken.trim()
+          }
+        >
           {loading ? "Sending..." : "Ask"}
         </button>
         <button
@@ -51,11 +124,18 @@ export default function Jenkins() {
             setQuestion("");
             setAnswer("");
             setError(null);
+            setMcpUrl(mcpUrlHint);
+            setJenkinsToken(tokenHint);
           }}
         >
           Clear
         </button>
       </div>
+      {configError && (
+        <div style={{ color: "#a67c00", fontSize: 13 }}>
+          Using fallback MCP defaults: {configError}
+        </div>
+      )}
       {error && <div style={{ color: "red", fontSize: 13 }}>{error}</div>}
       <textarea
         readOnly
diff --git a/server/routes/jenkins.js b/server/routes/jenkins.js
index 913e58f..20ac347 100644
--- a/server/routes/jenkins.js
+++ b/server/routes/jenkins.js
@@ -3,9 +3,16 @@ import { askJenkins } from '../src/agents/jenkins-agent.js';
 
 const router = express.Router();
 
-router.post('/ask', async (req, res) => {
+router.get("/config", (req, res) => {
+  res.json({
+    mcpUrlHint: process.env.JENKINS_MCP_URL || "http://192.168.1.35/mcp-server/mcp",
+    tokenHint: process.env.JENKINS_TOKEN || "",
+  });
+});
+
+router.post("/ask", async (req, res) => {
   try {
-    const { question } = req.body;
+    const { question, mcpUrl, token } = req.body;
     if (!question) {
       return res
         .status(400)
@@ -13,7 +20,7 @@ router.post('/ask', async (req, res) => {
     }
 
     console.log(`[JENKINS ASK] ${question}`);
-    const answer = await askJenkins(question);
+    const answer = await askJenkins(question, { mcpUrl, token });
 
     res.json({
       question,
diff --git a/server/src/agents/jenkins-agent.js b/server/src/agents/jenkins-agent.js
index bd26774..1907ca4 100644
--- a/server/src/agents/jenkins-agent.js
+++ b/server/src/agents/jenkins-agent.js
@@ -1,25 +1,25 @@
-import path from "node:path";
 import { Agent, run, MCPServerStreamableHttp } from "@openai/agents";
 
+const DEFAULT_JENKINS_MCP_URL = "http://192.168.1.35:8090/mcp-server/mcp";
 
-export async function askJenkins(question) {
+export async function askJenkins(question, options = {}) {
   const user = process.env.JENKINS_USER;
-  const token = process.env.JENKINS_TOKEN;
-  // construct Basic Auth
-  const authToken = Buffer.from(
-    `${process.env.JENKINS_USER}:${process.env.JENKINS_TOKEN}`
-  ).toString("base64");
+  const token = options.token || process.env.JENKINS_TOKEN;
+  const mcpUrl = options.mcpUrl || process.env.JENKINS_MCP_URL || DEFAULT_JENKINS_MCP_URL;
 
-  if (!user || !token) {
-    throw new Error("JENKINS_USER or JENKINS_TOKEN is not set in the environment");
+  if (!user) {
+    throw new Error("JENKINS_USER is not set in the environment");
   }
 
-  // 1. URL change /mcp-server/mcp
-  // 2. use requestInit.headers pass Authorization
-  console.log(authToken);
+  if (!token) {
+    throw new Error("JENKINS_TOKEN is required. Provide it in the request body or environment");
+  }
+
+  const authToken = Buffer.from(`${user}:${token}`).toString("base64");
+
   const jenkinsMcp = new MCPServerStreamableHttp({
     name: "jenkins-mcp",
-    url: "https://jenkins.ilessai.com/mcp-server/mcp",
+    url: mcpUrl,
     requestInit: {
       headers: {
         Authorization: `Basic ${authToken}`,
@@ -27,12 +27,8 @@ export async function askJenkins(question) {
     },
   });
 
-
-  await jenkinsMcp.connect();
-
-
   try {
-    console.log("[askJenkins] connecting to Jenkins MCP…");
+    console.log(`[askJenkins] connecting to Jenkins MCP at ${mcpUrl}…`);
     await jenkinsMcp.connect();
     console.log("[askJenkins] connected. Listing tools…");
 
@@ -68,4 +64,4 @@ export async function askJenkins(question) {
     await jenkinsMcp.close();
     console.log("[askJenkins] MCP connection closed.");
   }
-}
\ No newline at end of file
+}