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Infra2026-06-27 · source-backed
The July 28 release candidate introduces a stateless request/state/response model: a server returns an InputRequiredResult carrying inputRequests plus an opaque requestState, the client gathers answers, and re-issues the original call with inputResponses. (MCP Blog) This makes server-driven human-in-the-loop and mid-task LLM reasoning easier to proxy, which matters for the agent-gateway pattern below. If you've written against the old sampling/elicitation callbacks, plan the migration now. Stateless round-trips are easier to audit and intercept, which is the direction agent security is heading anyway.
Each link below shares sources, entities, or timing with this story.
MCP deprecates Roots / Shared entities / Same source / Shared topic / What happened next
Linked by a graph relationship (MCP deprecates Roots); both cover InputRequiredResult, MCP, MCP Blog, SEP; cite the same source (MCP Blog).
Anthropic released MCP / Shared entities / Same source domain / Shared topic / What happened next
Linked by a graph relationship (Anthropic released MCP); both cover InputRequiredResult, MCP, Multi Round, Stateless; reported by the same outlet (blog.modelcontextprotocol.io).
Linked by a graph relationship (Anthropic released MCP); both cover MCP, Multi Round, Trip Requests; reported by the same outlet (blog.modelcontextprotocol.io).
MCP deprecates Roots / Shared entity: MCP / Same source / Shared topic / What happened next
Linked by a graph relationship (MCP deprecates Roots); both cover MCP; cite the same source (MCP Blog).
MCP supports OpenID Connect / Shared entity: MCP / Same source / Shared topic / Earlier coverage
Linked by a graph relationship (MCP supports OpenID Connect); both cover MCP; cite the same source (MCP Blog).
Microsoft supports MCP / Shared entity: MCP / Same source / Shared topic / What happened next
Linked by a graph relationship (Microsoft supports MCP); both cover MCP; cite the same source (MCP Blog).
Claude uses MCP / Shared entity: MCP / Shared topic / What happened next / Tension
Linked by a graph relationship (Claude uses MCP); both cover MCP; overlapping topics (against, agent, call).
Anthropic released MCP / Shared entity: MCP / Shared topic / What happened next / Tension
Linked by a graph relationship (Anthropic released MCP); both cover MCP; overlapping topics (against, agent, request).