Server transport closed unexpectedly when trying to use HTTP Server on Claude

[sruthi223]

My MCP Server gets initialized successfully. I have added it to claude.. but it immediately gets closed. Below is my Claude desktop config. Can someone share ideas?

{
"mcpServers": {
"vertica-mcp": {
"command": "npx",
"args": [
"mcp-remote",
"http://x.x.x.x:8000"
],
"env": {
"MCP_ALLOW_HTTP": "true"
}
}
}
}

code pertaining to HTTP Server

httpServer := server.NewStreamableHTTPServer(s)
log.Println("Created HTTP server instance")

port := ":8000"
log.Printf("Starting HTTP server on port %s...\n", port)
log.Println("Server is ready to accept connections")
log.Println("Waiting for clients...")

if err := httpServer.Start(port); err != nil {
    log.Fatalf("Server error: %v\n", err)

I tried launching MCP server with allow-http. it still doesnt work. it keeps failing with same error.

./vertica-mcp --allow-http

2025-10-08T15:01:07.512Z [vertica-mcp] [info] Server started and connected successfully { metadata: undefined }
2025-10-08T15:01:07.527Z [vertica-mcp] [info] Message from client: {"method":"initialize","params":{"protocolVersion":"2025-06-18","capabilities":{},"clientInfo":{"name":"claude-ai","version":"0.1.0"}},"jsonrpc":"2.0","id":0} { metadata: undefined }
[5360] Error: Non-HTTPS URLs are only allowed for localhost or when --allow-http flag is provided
[5360] Usage: npx tsx proxy.ts https://server-url [callback-port] [--debug]
2025-10-08T15:01:08.871Z [vertica-mcp] [info] Server transport closed { metadata: undefined }
2025-10-08T15:01:08.871Z [vertica-mcp] [info] Client transport closed { metadata: undefined }
2025-10-08T15:01:08.872Z [vertica-mcp] [info] Server transport closed unexpectedly, this is likely due to the process exiting early. If you are developing this MCP server you can add output to stderr (i.e. console.error('...') in JavaScript, print('...', file=sys.stderr) in python) and it will appear in this log. { metadata: undefined }
2025-10-08T15:01:08.872Z [vertica-mcp] [error] Server disconnected. For troubleshooting guidance, please visit our debugging documentation { metadata: { context: 'connection', stack: undefined } }
2025-10-08T15:01:08.873Z [vertica-mcp] [info] Client transport closed { metadata: undefined }