2026-07-28 RC readiness

Catch migration gaps before clients do.

Paste a JSON description of your MCP server. This local-only checker flags legacy handshake assumptions, missing discovery metadata, sessions and deprecated capabilities.

Server description JSON

Stateless transport

The RC shifts metadata to each request and introduces server/discover.

Version negotiation

Clients and servers may negotiate down while SDK adoption catches up.

Privacy

Parsing runs entirely in your browser. Pasted JSON is not uploaded.