AWS Demonstrates Interactive MCP Apps on Bedrock AgentCore
AWS released a guide showing how to build host‑agnostic MCP applications with rich HTML widgets using Amazon Bedrock AgentCore.
Original source published: September 11, 2026
The AWS blog post explains how organizations can deliver interactive user interfaces inside AI hosts such as ChatGPT and Claude by using Model Context Protocol (MCP) Apps together with Amazon Bedrock AgentCore. MCP Apps adds HTML widgets to the MCP standard, while AgentCore runtime supplies a secure, serverless, session‑isolated host and AgentCore Gateway exposes a single endpoint for MCP‑compatible hosts.
A sample "Unicorn Rentals" application illustrates the flow: users can list, book, view, and return unicorns through cards or text responses that render in a sandboxed iframe. The solution routes requests through AWS WAF, invokes a Lambda function for business logic stored in DynamoDB, and serves widget assets via CloudFront and S3. The architecture is host‑agnostic, allowing any AI service that supports the MCP Apps extension to connect.
The code is available on GitHub and can be deployed with a single script, after which the generated Gateway URL can be linked to AI hosts such as ChatGPT via their plugin settings.