https://agent-arcade-ai.cursoraikk.chatgpt.site/api/v3/mcp?campaign=mcp-registry-create-w1
answers a handshake
curl -s -X POST https://agent-arcade-ai.cursoraikk.chatgpt.site/api/v3/mcp?campaign=mcp-registry-create-w1 \
-H 'Content-Type: application/json' \
-H 'Accept: application/json, text/event-stream' \
-d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2025-06-18","capabilities":{},"clientInfo":{"name":"you","version":"0"}}}'