#!/usr/bin/env node
/**
* Minimal MCP Test Client
*
* This client tests the minimal MCP server with various method names
* to identify the correct protocol format.
*/
import { spawn } from 'child_process';
import { fileURLToPath } from 'url';
import path from 'path';
// Get current file path and directory in ES modules
const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
// Path to the minimal server script
const serverPath = path.join(__dirname, 'minimal-mcp-server.js');
// Spawn the server process
const serverProcess = spawn('node', [serverPath], {
stdio: ['pipe', 'pipe', 'pipe']
});
// Set up event handlers for the server process
serverProcess.stdout.on('data', (data) => {
try {
// Try to parse as JSON
const response = JSON.parse(data.toString());
console.log('\nš¢ Server response:', JSON.stringify(response, null, 2));
// Check for method not found errors
if (response.error && response.error.message && response.error.message.includes('Method not found')) {
console.log('ā Method not found error detected');
} else if (response.result) {
console.log('ā
Successful response received');
}
} catch (error) {
// If not valid JSON, just log as text
console.log('\nšµ Server output:', data.toString());
}
});
serverProcess.stderr.on('data', (data) => {
console.log('\nš Server log:', data.toString());
});
serverProcess.on('error', (error) => {
console.error('\nš“ Error spawning server:', error);
});
serverProcess.on('close', (code) => {
console.log(`\nš£ Server process exited with code ${code}`);
});
// Function to send a JSON-RPC request to the server
function sendRequest(method, params = {}) {
const request = {
jsonrpc: '2.0',
id: Date.now().toString(),
method,
params
};
console.log('\nš” Sending request:', JSON.stringify(request, null, 2));
serverProcess.stdin.write(JSON.stringify(request) + '\n');
}
// Wait for server to start up
setTimeout(() => {
console.log('\nš Testing with various method name formats...');
// Method names to try
const methodsToTest = [
// Method name formats based on schema names
'list_tools',
'call_tool',
'/list_tools',
'/call_tool',
'ListToolsRequest',
'CallToolRequest',
// Namespaced method names
'/mcp/list_tools',
'/mcp/call_tool',
'mcp.list_tools',
'mcp.call_tool',
// Method names with full schema names
'ListToolsRequestSchema',
'CallToolRequestSchema',
// Special format used by some MCP implementations
'mcp/tools/list',
'mcp/tools/call',
'/mcp/tools/list',
'/mcp/tools/call'
];
let index = 0;
// Send requests with different method names at intervals
const sendNextRequest = () => {
if (index < methodsToTest.length) {
const method = methodsToTest[index];
console.log(`\nš Testing method name: ${method} (${index + 1}/${methodsToTest.length})`);
sendRequest(method);
index++;
setTimeout(sendNextRequest, 1000); // Wait 1 second between requests
} else {
console.log('\nā
Finished testing method formats');
// After testing all methods, try a specific tool call with the most likely method name
setTimeout(() => {
console.log('\nš Testing echo tool call with most likely method...');
sendRequest('call_tool', {
name: 'echo',
arguments: {
message: 'Hello from minimal test client!'
}
});
// Final cleanup
setTimeout(() => {
console.log('\nš Testing complete, shutting down...');
serverProcess.kill();
}, 2000);
}, 1000);
}
};
sendNextRequest();
}, 2000); // Wait 2 seconds for server to start
