Does Antigravity support httpstream endpoints, or only SSE via serverUrl?

[beyondeth]

Hello,

I’m researching automated posting workflows and currently using the Gemini CLI, where automatic posting works correctly using the httpUrl + httpstream configuration.

However, after switching to the newly released Antigravity client, it seems to enforce the use of serverUrl instead of httpUrl, and my previous configuration no longer works.

Here is the configuration I tried:

{
"mcpServers": {
"codebase-blog-mcp": {
"serverUrl": "https://mcp.codebase.blog/mcp",
"headers": {
"Authorization": "Bearer [api-key]",
"Accept": "application/json, text/event-stream"
}
}
}
}

It appears that Antigravity may only support SSE (server-sent events) for serverUrl, and does not support httpstream via plain HTTP responses. As a result, my automated posting endpoint no longer functions.

My questions are:

1. Does Antigravity currently not support httpstream endpoints (like the Gemini CLI did)?
2. Is serverUrl strictly limited to SSE-based protocols?
3. If httpstream is not supported, is there a plan to support it in the near future?

I want to confirm whether this limitation is expected behavior or if I am configuring something incorrectly.

Thank you.