#!/usr/bin/env python3
"""
MCP HTTP Client Wrapper with Authentication
Bridges stdio MCP protocol to HTTP REST API with basic auth support
"""
import json
import sys
import urllib.request
import urllib.error
import base64
import os
def main():
"""Read MCP requests from stdin and forward to HTTP server with auth."""
server_url = os.getenv("MCP_SERVER_URL", "http://localhost:8000")
username = os.getenv("MCP_USERNAME", "")
password = os.getenv("MCP_PASSWORD", "")
# Create basic auth header if credentials provided
headers = {'Content-Type': 'application/json'}
if username and password:
credentials = base64.b64encode(f"{username}:{password}".encode()).decode()
headers['Authorization'] = f'Basic {credentials}'
# Read from stdin line by line
for line in sys.stdin:
try:
# Parse MCP request
request = json.loads(line.strip())
# Forward to HTTP server
http_request = urllib.request.Request(
f"{server_url}/mcp",
data=json.dumps(request).encode('utf-8'),
headers=headers
)
# Get response
with urllib.request.urlopen(http_request) as response:
result = json.loads(response.read().decode('utf-8'))
# Write response to stdout
print(json.dumps(result), flush=True)
except json.JSONDecodeError as e:
error = {"error": f"Invalid JSON: {e}"}
print(json.dumps(error), file=sys.stderr, flush=True)
except urllib.error.HTTPError as e:
error = {"error": f"HTTP {e.code}: {e.reason}"}
print(json.dumps(error), file=sys.stderr, flush=True)
except Exception as e:
error = {"error": str(e)}
print(json.dumps(error), file=sys.stderr, flush=True)
if __name__ == "__main__":
main()
