Fetching from the wire…
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Agents2026-07-30 · source-backed
AWS's writeup details real protocol maturity: one gateway can advertise multiple protocol versions simultaneously so clients negotiate per-request rather than at handshake, session pinning is gone entirely, routing and throttling happen on Mcp-Method/Mcp-Name headers at the HTTP layer, and elicitation and sampling state moved into opaque tokens instead of long-lived streams. Transport failures now return real HTTP status codes instead of burying errors in a 200 with a JSON-RPC body. That last one is a small thing that will save someone six hours of debugging.
Each link below shares sources, entities, or timing with this story.
MCP deprecates Roots / Shared entities / Shared topic / Earlier coverage
Linked by a graph relationship (MCP deprecates Roots); both cover HTTP, JSON, MCP, Method; overlapping topics (call, client, gone).
Linked by a graph relationship (MCP deprecates Roots); both cover JSON, MCP, Method, RPC; overlapping topics (call, client, protocol).
Linked by a graph relationship (MCP deprecates Roots); both cover JSON, MCP, RPC; overlapping topics (client, error, gone, protocol).
Microsoft uses AWS / Shared entities / Shared topic / Earlier coverage
Linked by a graph relationship (Microsoft uses AWS); both cover HTTP, MCP, Method; overlapping topics (call, client, protocol).
MCP deprecates Roots / Shared entities / Shared topic / Earlier coverage
Linked by a graph relationship (MCP deprecates Roots); both cover MCP, Method, Name; overlapping topics (body, gateway).
MCP uses OAuth / Shared entities / Same source domain / Shared topic / Earlier coverage
Linked by a graph relationship (MCP uses OAuth); both cover AWS, MCP, Method; reported by the same outlet (aws.amazon.com).
Cursor partners with AWS / Shared entities / Shared topic / Earlier coverage
Linked by a graph relationship (Cursor partners with AWS); both cover HTTP, MCP; overlapping topics (call, client).
AWS partners with Cisco / Shared entities / Same source domain / Earlier coverage
Linked by a graph relationship (AWS partners with Cisco); both cover AWS, MCP; reported by the same outlet (aws.amazon.com).