---
title: "Retrofit, don’t rebuild: Agentic overlays for transforming legacy enterprise services"
slug: "retrofit-dont-rebuild-agentic-overlays-for-transforming-legacy-enterprise-services"
date: 2026-06-25
category: tech-pub
tags: [agents, amazon]
language: en
sources_count: 1
featured: false
publisher: AInauten News
url: https://news.ainauten.com/en/story/retrofit-dont-rebuild-agentic-overlays-for-transforming-legacy-enterprise-services
---

# Retrofit, don’t rebuild: Agentic overlays for transforming legacy enterprise services

**Published**: 2026-06-25 | **Category**: tech-pub | **Sources**: 1

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## TL;DR

In this technical collaboration between AWS and the authors, we present a pragmatic solution: agentic overlays.

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## Summary

In this technical collaboration between AWS and the authors, we present a pragmatic solution: agentic overlays. Agentic overlays are thin wrapper layers that transform traditional REST-based services into agents capable of participating in A2A interactions. They also expose REST APIs as tools compatible with the Model Context Protocol (MCP). Together, they let enterprises add A2A capabilities to existing REST services without rewriting business logic, without duplicating code, and without running parallel infrastructures. This reduces agent sprawl in the infrastructure by reusing existing services as agents. We provide reference architectures and sample code that show how to build agentic overlays.

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## Why it matters

In this technical collaboration between AWS and the authors, we present a pragmatic solution: agentic overlays.

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## Key Points

- In this technical collaboration between AWS and the authors, we present a pragmatic solution: agentic overlays.
- Agentic overlays are thin wrapper layers that transform traditional REST-based services into agents capable of participating in A2A interactions.
- They also expose REST APIs as tools compatible with the Model Context Protocol (MCP).
- Together, they let enterprises add A2A capabilities to existing REST services without rewriting business logic, without duplicating code, and without running parallel infrastructures.
- This reduces agent sprawl in the infrastructure by reusing existing services as agents.

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## FAQ

**Q:** What is Retrofit, don’t rebuild about?

**A:** In this technical collaboration between AWS and the authors, we present a pragmatic solution: agentic overlays.

**Q:** Why does it matter?

**A:** In this technical collaboration between AWS and the authors, we present a pragmatic solution: agentic overlays.

**Q:** What are the key takeaways?

**A:** In this technical collaboration between AWS and the authors, we present a pragmatic solution: agentic overlays.. Agentic overlays are thin wrapper layers that transform traditional REST-based services into agents capable of participating in A2A interactions.. They also expose REST APIs as tools compatible with the Model Context Protocol (MCP).

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## Related Topics

- [agents](https://news.ainauten.com/en/tag/agents)
- [amazon](https://news.ainauten.com/en/tag/amazon)

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## Sources

- [Retrofit, don’t rebuild: Agentic overlays for transforming legacy enterprise services](https://aws.amazon.com/blogs/machine-learning/retrofit-dont-rebuild-agentic-overlays-for-transforming-legacy-enterprise-services/) - AWS Machine Learning Blog

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## About This Article

This article is a synthesis of 1 sources, curated and summarized by AInauten News. We aggregate AI news from trusted sources and provide bilingual (German/English) coverage.

**Publisher**: [AInauten](https://www.ainauten.com) | **Site**: [news.ainauten.com](https://news.ainauten.com)

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*Last Updated: 2026-06-26*