On August 25 2026 Cloudflare announced that the MCP server portals used by Cloudflare One Access now accept the stateless MCP 2026‑07‑28 specification for both client‑facing and upstream server connections.
Key points of the update
- The portal’s
/mcpendpoint automatically handles stateless MCP 2026‑07‑28 requests and continues to support earlier 2025 Streamable HTTP clients. - When the portal connects upstream to a Streamable HTTP server, it probes for MCP 2026‑07‑28 support and falls back to the 2025 handshake if the server does not understand the newer protocol.
- Client‑side and upstream‑side protocol selections are independent, allowing clients and servers to upgrade at different times without requiring portal reconfiguration.
- Server‑Sent Events (SSE) connections remain on the legacy protocol.
For detailed transport and compatibility information, refer to the MCP server portal documentation linked below.