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Preview web apps live as your coding agent builds them with Amazon Bedrock AgentCore runtime

According to AWS. Amazon Bedrock AgentCore runtime enables live application previews through isolated microVM sessions and authenticated Session endpoints.

By TigerIQ News DeskPublished 10/31/2026, 06:18 AM4 min readShare · LinkedInShare · Email
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Preview web apps live as your coding agent builds them with Amazon Bedrock AgentCore runtime
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KEY TAKEAWAYS
  • • Coding agents can now build working web apps while users review work inside the browser within seconds.
  • • Amazon Bedrock AgentCore runtime runs each agent session in its own isolated microVM.
  • • Session endpoints provide an authenticated URL that forwards requests and WebSocket connections to allowed ports.
  • • Requests to Session endpoints are secured using either AWS IAM signatures or inbound JWT authorizers.

Introduction to AgentCore Runtime

Amazon Bedrock AgentCore is a platform to build, connect, and optimize agents at scale, with your choice of agent framework and foundation model. AgentCore runtime runs each agent session in its own isolated microVM, allowing development teams to review agent work rapidly without waiting for traditional deployments.

Session Endpoint Capabilities

With Session endpoints, you can open an app running in an active session directly from your browser. Each session receives an authenticated URL that forwards HTTP methods, query parameters, bodies, and WebSocket connections to designated allowed ports while enforcing security through IAM signatures or JWT bearer tokens.

SOURCES & METHODOLOGY
  1. 1. aws.amazon.com
    Open source
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