MCP 2026-07-28 removes session handshakes and open streams, letting servers run stateless on Workers instead of Durable Objects—each request now carries its own protocol context.
Summary
Eliminates sticky sessions, stream management, and deployment complexity for agents talking to external services. Developers can now deploy MCP servers as simple request-scoped functions instead of managing stateful infrastructure.
Why it matters
Eliminates sticky sessions, stream management, and deployment complexity for agents talking to external services. Developers can now deploy MCP servers as simple request-scoped functions instead of managing stateful infrastructure.
Implementation verdict
Replaces McpAgent + Durable Objects for most MCP deployments; requires SDK migration (TypeScript/Python/Go/C# updated). Breaking change for elicitation (now Multi Round-Trip Requests), but ready now—Cloudflare customers have validated against production traffic. Worth migrating if you control both client and server.
Sources
Dev Signal
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