Industry story
AgentCore Gateway Adds Full MCP Stateful Session Support with Elicitation and Sampling
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Stateful sessions, elicitation, and sampling in a managed gateway is AWS making a real bid to own the MCP infrastructure layer before anyone else locks it in. AgentCore Gateway now handles session IDs, configurable timeouts, SSE streaming, mid-execution user input requests (form or OAuth), and client-side LLM calls — the full stack of what human-in-the-loop agent workflows actually require. The question isn't whether these features matter; it's whether AWS can pull developers into AgentCore before they've already stitched together their own tooling.
Full analysis
AWS AgentCore Gateway shipped a suite of MCP (Model Context Protocol) session features: stateful sessions with unique session IDs and configurable timeouts, Server-Sent Events streaming for real-time responses, elicitation pass-through allowing MCP server tools to request user input mid-execution (form or OAuth URL modes), and sampling — where tools can request LLM completions from the client during execution. These capabilities collectively enable human-in-the-loop workflows and richer agent-to-tool interactions through a managed gateway without custom infrastructure.
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