AWS Bedrock AgentCore and Microsoft Azure Foundry Connected via A2A Protocol

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A developer successfully linked Amazon Bedrock AgentCore on AWS with a Microsoft Azure Foundry-hosted agent using the Agent-to-Agent (A2A) v1.0 protocol, with the integration verified on July 29, 2026. The demo used a currency conversion task — converting 100 USD to EUR — as a deterministic test case to confirm both sides produced identical results. The system operates in three modes: MCP-only, A2A-only, and a verified mode that runs both concurrently and compares outputs using decimal arithmetic. A key challenge involved granting the AWS-hosted AgentCore runtime an Azure identity to authenticate with Foundry, which was solved by storing Azure service principal credentials in AWS Secrets Manager. The project code is publicly available on GitHub under xbill9/bedrock-foundry-a2a-currency.

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