# /sse changes: it no longer serves the HTTP+SSE transport

Calls to /sse on Cloudflare Ai Gateway MCP stopped working on July 28, 2026.

- API: Cloudflare Ai Gateway MCP (ai-gateway.mcp.cloudflare.com)
- Kind: Behaviour change
- Announced: July 28, 2026
- Takes effect: July 28, 2026
- Calls after that day: fail
- Calls it hits: `/sse`
- Source: [Announcement](https://developers.cloudflare.com/changelog/post/2026-07-28-cloudflare-mcp-servers-mcp-2026-07-28/)
- Page: https://www.okapi.bot/providers/cloudflare-ai-gateway-mcp/breaking-changes/sse-changes-it-no-longer-serves-the-http-sse-transport/

## What to use instead

Connect to /mcp over Streamable HTTP, or let the client detect the transport.