"""Vercel serverless function for MCP server"""
from http.server import BaseHTTPRequestHandler
import json
class handler(BaseHTTPRequestHandler):
def do_GET(self):
"""Handle GET requests"""
self.send_response(200)
self.send_header('Content-type', 'application/json')
self.end_headers()
self.wfile.write(json.dumps({"status": "ok", "server": "hello-mcp-server"}).encode())
def do_POST(self):
"""Handle POST requests"""
content_length = int(self.headers['Content-Length'])
post_data = self.rfile.read(content_length)
try:
data = json.loads(post_data)
except json.JSONDecodeError:
self.send_response(400)
self.send_header('Content-type', 'application/json')
self.end_headers()
self.wfile.write(json.dumps({"error": "Invalid JSON"}).encode())
return
method = data.get("method")
params = data.get("params", {})
request_id = data.get("id")
response_data = None
# Handle MCP methods
if method == "initialize":
response_data = {
"jsonrpc": "2.0",
"result": {
"protocolVersion": "2024-11-05",
"capabilities": {
"tools": {},
"resources": {},
"prompts": {}
},
"serverInfo": {
"name": "hello-mcp-server",
"version": "1.0.0"
}
},
"id": request_id
}
elif method == "tools/list":
response_data = {
"jsonrpc": "2.0",
"result": {
"tools": [
{
"name": "say_hello",
"description": "Say hello and get 7 as response",
"inputSchema": {
"type": "object",
"properties": {
"message": {
"type": "string",
"description": "The message to send"
}
},
"required": ["message"]
}
}
]
},
"id": request_id
}
elif method == "tools/call":
tool_name = params.get("name")
args = params.get("arguments", {})
if tool_name == "say_hello":
message = args.get("message", "")
if "hello" in message.lower():
result_text = "7"
else:
result_text = f"You said: {message}"
response_data = {
"jsonrpc": "2.0",
"result": {
"content": [
{
"type": "text",
"text": result_text
}
]
},
"id": request_id
}
elif method == "resources/list":
response_data = {
"jsonrpc": "2.0",
"result": {
"resources": []
},
"id": request_id
}
elif method == "prompts/list":
response_data = {
"jsonrpc": "2.0",
"result": {
"prompts": []
},
"id": request_id
}
if not response_data:
response_data = {
"jsonrpc": "2.0",
"error": {
"code": -32601,
"message": "Method not found"
},
"id": request_id
}
self.send_response(200)
self.send_header('Content-type', 'application/json')
self.send_header('Access-Control-Allow-Origin', '*')
self.send_header('Access-Control-Allow-Methods', 'GET, POST, OPTIONS')
self.send_header('Access-Control-Allow-Headers', 'Content-Type')
self.end_headers()
self.wfile.write(json.dumps(response_data).encode())
def do_OPTIONS(self):
"""Handle OPTIONS requests for CORS"""
self.send_response(200)
self.send_header('Access-Control-Allow-Origin', '*')
self.send_header('Access-Control-Allow-Methods', 'GET, POST, OPTIONS')
self.send_header('Access-Control-Allow-Headers', 'Content-Type')
self.end_headers()
