mcp-sse-client-initializ-domexception-syntaxerror-an-invalid-or-illegal-str-92c0d608

THEN When initializing SSEClientTransport, wrap the SSE endpoint URL string in a new URL() object and pass that object instead of the bare string. This ensures the EventSource constructor receives a properly formatted URL, avoiding the syntax error.

const baseUrl = new URL(sseUrl);
const transport = new SSEClientTransport(baseUrl);