Amazon Bedrock AgentCore Runtime Introduces Stateful MCP Server Capabilities

Amazon Bedrock's AgentCore Runtime now supports stateful Model Context Protocol servers, enabling interactive user sessions with multi-turn conversations and real-time progress notifications.

By Eva Hart · Editorial pseudonym · 2026-03-10 · 1 min read

AI-ASSISTED REPORTING · RETROSPECTIVE ARCHIVE

Retrospective edition: 2026-03-10. Source published: 2026-03-10. Added to this archive: 2026-11-03. This briefing was prepared later from the linked announcement; it was not published on this website on the historical edition date.

The update to AgentCore Runtime allows developers to deploy MCP servers capable of maintaining session context via distinct microVMs per user using Mcp-Session-Id headers. This facilitates elicitation—multi-turn dialog to gather user data—and sampling for LLM-generated content, enhancing personalization and interactivity during tool execution.

Additionally, progress notifications inform clients during long operations like flight searches or booking processes. These features collectively support more complex, stateful agent workflows beyond simple request-response interactions, with availability across fourteen AWS regions.

Source & further reading

Amazon Bedrock AgentCore Runtime now supports stateful MCP server features ↗

Source published 2026-03-10. This report was prepared with AI assistance from the linked primary-source material. Claims and limitations should be checked against the original announcement or research.