diff --git a/README.md b/README.md
index 5219c27..9103761 100644
--- a/README.md
+++ b/README.md
@@ -147,6 +147,7 @@ flowchart TD
 | --------- | ----------------------------------------- |
 | 🔴 Red    | Your input prompt (`You >`)               |
 | 🔵 Blue   | Agent response (`Agent >`)                |
+| 🟣 Magenta| Response time (`responded in 1.2s`)       |
 | 🟡 Yellow | Chosen tool name                          |
 | 🟢 Green  | Agent reasoning (why it picked that tool) |
 
diff --git a/src/agent.js b/src/agent.js
index d1f43dd..17459f1 100644
--- a/src/agent.js
+++ b/src/agent.js
@@ -1,3 +1,4 @@
+const { calculateResponseTime } = require("./help");
 const { askLLM } = require("./llm");
 const { tools } = require("./tools");
 
@@ -69,11 +70,16 @@ async function runAgent(userInput, messages = []) {
   if (messages.length === 0) {
     messages.push({ role: "system", content: SYSTEM_PROMPT });
   }
-  
+
   messages.push({ role: "user", content: userInput });
 
   console.log("\x1b[41m [Agent Thinking...] \x1b[0m");
+  const startTime = Date.now();
   const response = await askLLM(messages);
+  const endTime = Date.now();
+  const responseTimeSeconds = calculateResponseTime(startTime, endTime);
+  console.log(`\x1b[45m [Responded in: ${responseTimeSeconds}s] \x1b[0m`);
+
   messages.push({ role: "assistant", content: response });
 
   if (response.startsWith("TOOL")) {
diff --git a/src/help.js b/src/help.js
index 798b9c1..b7a4476 100644
--- a/src/help.js
+++ b/src/help.js
@@ -9,7 +9,10 @@ function printHelp() {
   const toolLabel = (name) => `[${name}]`;
 
   const toolsSummary = Object.entries(tools)
-    .map(([name, details]) => `  ${toolLabel(name).padEnd(16, " ")} ${details.description}`)
+    .map(
+      ([name, details]) =>
+        `  ${toolLabel(name).padEnd(16, " ")} ${details.description}`,
+    )
     .join("\n");
 
   const lines = [
@@ -33,4 +36,9 @@ function printHelp() {
   console.log(lines.join("\n"));
 }
 
-module.exports = { printHelp };
\ No newline at end of file
+function calculateResponseTime(startTime, endTime) {
+  const diffMs = endTime - startTime;
+  const diffSnd = diffMs / 1000;
+  return diffSnd;
+}
+module.exports = { printHelp, calculateResponseTime };
diff --git a/src/llm.js b/src/llm.js
index a1c9b3a..32013e5 100644
--- a/src/llm.js
+++ b/src/llm.js
@@ -2,8 +2,13 @@ const { GoogleGenAI } = require("@google/genai");
 require("dotenv").config({ quiet: true });
 
 async function askLLM(messages) {
-  if (!process.env.GEMINI_API_KEY || process.env.GEMINI_API_KEY === "your_gemini_api_key_here") {
-    console.error("\x1b[31mError: GEMINI_API_KEY is not configured.\x1b[0m\n  Copy \x1b[33m.env.example\x1b[0m to \x1b[33m.env\x1b[0m and add your API key from \x1b[34mhttps://aistudio.google.com/app/apikey\x1b[0m");
+  if (
+    !process.env.GEMINI_API_KEY ||
+    process.env.GEMINI_API_KEY === "your_gemini_api_key_here"
+  ) {
+    console.error(
+      "\x1b[31mError: GEMINI_API_KEY is not configured.\x1b[0m\n  Copy \x1b[33m.env.example\x1b[0m to \x1b[33m.env\x1b[0m and add your API key from \x1b[34mhttps://aistudio.google.com/app/apikey\x1b[0m",
+    );
     process.exit(1);
   }