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mcp-api-client.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Model Context Protocol (MCP) Simulator</title>
<style>
body {
font-family: 'Arial', sans-serif;
max-width: 800px;
margin: 0 auto;
padding: 20px;
background-color: #f7f9fc;
}
h1 {
color: #4a4d82;
text-align: center;
}
.info-box {
background-color: #e6f7ff;
border-left: 4px solid #1890ff;
padding: 10px 15px;
margin-bottom: 20px;
border-radius: 4px;
}
.container {
background-color: white;
border-radius: 8px;
padding: 20px;
box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}
.control-panel {
display: flex;
gap: 10px;
margin-bottom: 20px;
justify-content: center;
}
button {
padding: 10px 20px;
border: none;
border-radius: 4px;
color: white;
font-weight: bold;
cursor: pointer;
transition: all 0.2s ease;
}
button:hover {
transform: translateY(-2px);
box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}
#ping-btn {
background-color: #4a4d82;
}
#pong-btn {
background-color: #6469a8;
}
#count-btn {
background-color: #7f85cc;
}
#prompt-btn {
background-color: #6469a8;
}
.log-container {
height: 300px;
overflow-y: auto;
padding: 15px;
border: 1px solid #eaeaea;
border-radius: 6px;
background-color: #fafafa;
font-family: monospace;
}
.message {
margin: 8px 0;
padding: 10px;
border-radius: 6px;
position: relative;
}
.client {
background-color: #f0f5ff;
border-left: 4px solid #4a4d82;
margin-right: 40px;
}
.server {
background-color: #f6ffed;
border-left: 4px solid #52c41a;
margin-left: 40px;
}
.error {
background-color: #fff1f0;
border-left: 4px solid #f5222d;
}
.timestamp {
color: #888;
font-size: 0.8em;
margin-bottom: 5px;
}
.status-bar {
display: flex;
justify-content: space-between;
align-items: center;
margin-top: 15px;
padding: 10px;
background-color: #fafafa;
border-radius: 4px;
}
#server-status {
font-weight: bold;
}
.connected {
color: #52c41a;
}
.disconnected {
color: #f5222d;
}
.visualization {
display: flex;
align-items: center;
justify-content: space-between;
margin: 30px 0;
position: relative;
height: 100px;
}
.client-box,
.server-box {
width: 120px;
height: 70px;
border-radius: 8px;
display: flex;
align-items: center;
justify-content: center;
font-weight: bold;
box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}
.client-box {
background-color: #4a4d82;
color: white;
}
.server-box {
background-color: #52c41a;
color: white;
}
.arrow-container {
flex-grow: 1;
height: 100%;
position: relative;
}
.arrow {
position: absolute;
height: 3px;
background-color: #d9d9d9;
top: 50%;
left: 10px;
right: 10px;
transform: translateY(-50%);
}
.arrow::after {
content: '';
position: absolute;
right: -5px;
top: -4px;
width: 0;
height: 0;
border-top: 5px solid transparent;
border-bottom: 5px solid transparent;
border-left: 10px solid #d9d9d9;
}
.data-packet {
position: absolute;
width: 40px;
height: 20px;
background-color: #1890ff;
border-radius: 10px;
color: white;
font-size: 10px;
display: flex;
align-items: center;
justify-content: center;
opacity: 0;
transition: all 0.5s ease;
}
.client-to-server {
top: 35px;
left: 50%;
transform: translateX(-50%);
}
.server-to-client {
bottom: 35px;
left: 50%;
transform: translateX(-50%) rotate(180deg);
}
.active {
opacity: 1;
}
.animate-left-to-right {
animation: moveLeftToRight 1s ease-in-out;
}
.animate-right-to-left {
animation: moveRightToLeft 1s ease-in-out;
}
@keyframes moveLeftToRight {
0% {
left: 20%;
}
100% {
left: 80%;
}
}
@keyframes moveRightToLeft {
0% {
left: 80%;
}
100% {
left: 20%;
}
}
</style>
</head>
<body>
<div class="container">
<h1>Model Context Protocol (MCP) Simulator</h1>
<div class="info-box">
This simulator demonstrates a simple implementation of Anthropic's Model Context Protocol (MCP).
The communication follows the protocol where the client sends commands and the server responds accordingly.
</div>
<div class="visualization">
<div class="client-box">Client</div>
<div class="arrow-container">
<div class="arrow client-to-server"></div>
<div id="client-packet" class="data-packet">ping</div>
<div class="arrow server-to-client"></div>
<div id="server-packet" class="data-packet">pong</div>
</div>
<div class="server-box">MCP Server</div>
</div>
<div class="control-panel">
<button id="ping-btn">Send PING</button>
<button id="pong-btn">Send PONG</button>
<button id="count-btn">Get COUNT</button>
<button id="prompt-btn">Show PROMPT</button>
</div>
<div class="log-container" id="log">
<div class="message">Welcome to the Model Context Protocol Simulator. Click a button to start.</div>
</div>
<div class="status-bar">
<div>Server Status: <span id="server-status" class="disconnected">Disconnected</span></div>
<div>Session ID: <span id="session-id">None</span></div>
</div>
</div>
<script>
// Configuration
const MCP_ENDPOINT = 'http://localhost:8080';
let serverConnected = false;
let sessionId = null;
// DOM elements
const log = document.getElementById('log');
const serverStatus = document.getElementById('server-status');
const sessionIdElement = document.getElementById('session-id');
const clientPacket = document.getElementById('client-packet');
const serverPacket = document.getElementById('server-packet');
// Generate a random session ID
function generateSessionId() {
return 'session-' + Math.random().toString(36).substring(2, 15);
}
// Helper functions for logging
function getTimestamp() {
const now = new Date();
return now.toLocaleTimeString([], { hour: '2-digit', minute: '2-digit', second: '2-digit', hour12: false });
}
function addLogMessage(message, type) {
const msgElement = document.createElement('div');
msgElement.className = `message ${type}`;
const timestamp = document.createElement('div');
timestamp.className = 'timestamp';
timestamp.textContent = getTimestamp();
const content = document.createElement('div');
content.textContent = message;
msgElement.appendChild(timestamp);
msgElement.appendChild(content);
log.appendChild(msgElement);
log.scrollTop = log.scrollHeight;
}
// Animation functions
function animateClientToServer(command) {
clientPacket.textContent = command;
clientPacket.classList.add('active');
clientPacket.classList.add('animate-left-to-right');
setTimeout(() => {
clientPacket.classList.remove('active');
clientPacket.classList.remove('animate-left-to-right');
}, 1000);
}
function animateServerToClient(response) {
serverPacket.textContent = response;
serverPacket.classList.add('active');
serverPacket.classList.add('animate-right-to-left');
setTimeout(() => {
serverPacket.classList.remove('active');
serverPacket.classList.remove('animate-right-to-left');
}, 1000);
}
// MCP communication
async function sendMCPRequest(command) {
// Initialize session if not already done
if (!sessionId) {
sessionId = generateSessionId();
sessionIdElement.textContent = sessionId;
}
// Animate client to server
animateClientToServer(command);
try {
addLogMessage(`Sending command: ${command}`, 'client');
const response = await fetch(`${MCP_ENDPOINT}/ping-pong`, {
method: 'POST',
headers: {
'Content-Type': 'application/json'
},
mode: 'cors',
credentials: 'same-origin',
body: JSON.stringify({ command: command, session_id: sessionId })
});
if (!response.ok) {
throw new Error(`Server error: ${response.status}`);
}
const data = await response.json();
// Update connection status
if (!serverConnected) {
serverConnected = true;
serverStatus.textContent = 'Connected';
serverStatus.className = 'connected';
}
// Handle response
if (data.error) {
addLogMessage(`Error: ${data.error}`, 'error');
} else {
const responseText = data.data;
addLogMessage(`Server responded: ${responseText}`, 'server');
animateServerToClient(responseText);
// Update sessionId if the server returns one
if (data.session_id) {
sessionId = data.session_id;
sessionIdElement.textContent = sessionId;
}
}
} catch (error) {
addLogMessage(`Communication error: ${error.message}`, 'error');
serverStatus.textContent = 'Disconnected';
serverStatus.className = 'disconnected';
serverConnected = false;
}
}
// Function to get the prompt from the server
async function getPrompt() {
try {
// Ask user for prompt name
const promptName = prompt("Enter prompt name to retrieve:", "");
if (!promptName) {
addLogMessage("Prompt request canceled or empty prompt name", "error");
return;
}
addLogMessage(`Requesting prompt: "${promptName}"...`, 'client');
animateClientToServer('prompt');
const response = await fetch(`${MCP_ENDPOINT}/ping-pong?prompt_name=${encodeURIComponent(promptName)}`, {
method: 'GET',
headers: {
'Accept': 'application/json'
},
mode: 'cors',
credentials: 'same-origin'
});
if (!response.ok) {
throw new Error(`Server error: ${response.status}`);
}
const data = await response.json();
// Update connection status
if (!serverConnected) {
serverConnected = true;
serverStatus.textContent = 'Connected';
serverStatus.className = 'connected';
}
// Handle response
if (data.error) {
addLogMessage(`Error: ${data.error}`, 'error');
} else {
const promptDetails = data.description ?
`"${data.prompt}": ${data.description}: ${data.content}` :
data.prompt || "No prompt details returned";
addLogMessage(`Server prompt: ${promptDetails}`, 'server');
animateServerToClient('prompt');
}
} catch (error) {
addLogMessage(`Communication error: ${error.message}`, 'error');
serverStatus.textContent = 'Disconnected';
serverStatus.className = 'disconnected';
serverConnected = false;
}
}
// Event listeners
document.getElementById('ping-btn').addEventListener('click', () => sendMCPRequest('ping'));
document.getElementById('pong-btn').addEventListener('click', () => sendMCPRequest('pong'));
document.getElementById('count-btn').addEventListener('click', () => sendMCPRequest('count'));
document.getElementById('prompt-btn').addEventListener('click', getPrompt);
// Check connection on startup
addLogMessage('Initializing Model Context Protocol simulator...', 'message');
</script>
</body>
</html>