#!/usr/bin/env node
// Ultra minimal MCP bridge for testing
const responses = {
initialize: (id) => ({
jsonrpc: '2.0',
id: id,
result: {
protocolVersion: '2025-06-18',
capabilities: {
tools: { listChanged: false },
resources: { subscribe: false, listChanged: false },
prompts: { listChanged: false }
},
serverInfo: {
name: 'Minimal MCP Bridge',
version: '1.0.0'
}
}
}),
'tools/list': (id) => ({
jsonrpc: '2.0',
id: id,
result: {
tools: [
{
name: 'test-tool',
description: 'A simple test tool',
inputSchema: {
type: 'object',
properties: {},
required: []
}
}
]
}
}),
'prompts/list': (id) => ({
jsonrpc: '2.0',
id: id,
result: { prompts: [] }
}),
'resources/list': (id) => ({
jsonrpc: '2.0',
id: id,
result: { resources: [] }
})
};
process.stdin.on('data', (data) => {
const lines = data.toString().split('\n');
for (const line of lines) {
if (!line.trim()) continue;
try {
const msg = JSON.parse(line);
// Handle notifications (no response)
if (msg.method === 'notifications/initialized') {
continue;
}
// Handle regular methods
if (responses[msg.method]) {
console.log(JSON.stringify(responses[msg.method](msg.id)));
} else {
console.log(JSON.stringify({
jsonrpc: '2.0',
id: msg.id,
error: { code: -32601, message: 'Method not found' }
}));
}
} catch (e) {
console.log(JSON.stringify({
jsonrpc: '2.0',
error: { code: -32700, message: 'Parse error' },
id: null
}));
}
}
});
process.stdin.setEncoding('utf8');
process.stdin.resume();
process.on('SIGINT', () => process.exit(0));
process.on('SIGTERM', () => process.exit(0));
