Building Serverless A2A Gateway for Agent Management on AWS

Reilly Manton· July 1, 2026 View original

Summary

This post details how to construct a serverless Agent-to-Agent (A2A) gateway on AWS, enabling multiple AI agents to be hosted under a single domain. It utilizes path-based routing for agent discovery and access control, ensuring compatibility with standard A2A clients.

The article provides a guide on developing a serverless Agent-to-Agent (A2A) gateway within the AWS ecosystem. This architectural pattern allows for the consolidation of multiple AI agents behind a single, unified domain. By implementing path-based routing, such as `/agents/{agentId}`, the gateway facilitates efficient agent discovery, intelligent request routing, and robust access control mechanisms. A key advantage highlighted is that existing A2A clients can interact with this gateway without requiring any modifications, simplifying integration.

Why it matters

For developers and architects, this offers a blueprint for creating scalable, secure, and manageable infrastructures for deploying and orchestrating multiple AI agents, crucial for complex AI systems.

How to implement this in your domain

  1. 1Design the overall architecture for your multi-agent system, considering agent types and interactions.
  2. 2Set up AWS API Gateway and Lambda functions to handle incoming requests and route them to specific agents.
  3. 3Implement path-based routing rules to direct requests to the correct agent based on the URL path.
  4. 4Integrate authentication and authorization mechanisms for secure access control to agents.
  5. 5Test the gateway thoroughly to ensure proper agent discovery, routing, and client compatibility.

Who benefits

Software DevelopmentAI/ML ServicesCloud ComputingEnterprise IT

Key takeaways

  • Serverless A2A gateways streamline multi-agent deployments.
  • Path-based routing simplifies agent discovery and access.
  • AWS provides tools for building scalable agent infrastructures.
  • Standard A2A clients can integrate seamlessly.

Original post by Reilly Manton

"In this post, you will learn how to build a serverless A2A gateway on AWS that hosts multiple agents behind a single domain using path-based routing (/agents/{agentId}). Standard A2A clients work without modification."

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