mcp-mcp-connection-claude-desktop-logs-unexpected-end-of-json-input-e-2117da17

THEN Ensure the MCP server configuration uses the correct 'command' and 'args' fields for STDIO transport. Do not set 'command' to 'echo' or include a 'server' object with TCP parameters unless the server explicitly supports SSE/TCP. For the postgres MCP server, use a command like 'npx -y @modelcontextprotocol/server-postgres' and pass connection details via environment variables or command-line arguments. Verify that the server process outputs valid JSON-RPC messages on stdout.

// Correct configuration for postgres MCP server
"postgres": {
  "command": "npx",
  "args": ["-y", "@modelcontextprotocol/server-postgres", "--connection-string", "postgresql://user:pass@host:5432/db"]
}