This article explains how to build and test a cross-cloud currency agent. An Amazon Bedrock master agent, built with Strands Agents and hosted on Amazon Bedrock AgentCore Runtime in AWS us-east-1, delegates to a Google ADK worker on GCP Cloud Run in us-central1 over A2A v1.0. The master cross-checks the worker against an MCP exchange-rate tool and measures the latency, reliability, and failure behavior of cross-cloud verification.
What is this project trying to do?
Most Agent-to-Agent (A2A) protocol demos stop at "look, the HTTP 200 OK request succeeded." That is a smoke test, not an interoperability benchmark.
This project goes further: the Bedrock master owns the user interaction and benchmark policy. It discovers and calls a Google ADK worker running on GCP Cloud Run, then compares the worker result with a local MCP stdio exchange-rate tool backed by live Frankfurter daily reference rates.
We also compare the performance, developer experience, and wire compatibility with a previous benchmark run using Microsoft Foundry in Azure (gpt-5-mini). Together, the runs cover components hosted across AWS, Azure, and GCP.
