How I Built a Universal MCP ↔ A2A Bridge: Architecture, Protocol Mapping, and What I Learned

May 16, 2026 · 10:23 PM UTC ·4 min read · 0 reactions · 0 comments · 24 views

#ai #programming #opensource #technology

TL;DR · WeSearch summary

The article discusses the development of Nexarion, a runtime bridge that connects two incompatible AI protocols: Anthropic's MCP and Google's A2A. The author outlines the architecture and protocol mapping used to facilitate communication between these systems. Key features include dynamic tool synthesis and a plugin system for middleware hooks, which enhance the bridge's functionality.

Key facts

▪The AI agent ecosystem is currently divided between two standards, MCP and A2A, which do not interoperate.
▪Nexarion acts as a translation runtime that allows MCP clients to communicate with A2A agents seamlessly.
▪The bridge includes a discovery layer, a translation layer, and a routing layer to manage interactions between the two protocols.

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Original publisher	DEV.to (Top)
Canonical URL	https://dev.to/vahapogut/how-i-built-a-universal-mcp-a2a-bridge-architecture-protocol-mapping-and-what-i-learned-df3
Publication time	Sat, 16 May 2026 22:23:07 +0000
Retrieval time	2026-05-16T22:40:19.056Z
Last seen	2026-05-16T22:40:19.056Z
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Opening excerpt (first ~120 words) tap to expand

try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 3935563) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } Vahap Ogut Posted on May 16 How I Built a Universal MCP ↔ A2A Bridge: Architecture, Protocol Mapping, and What I Learned #ai #typescript #programming #opensource The AI agent ecosystem is fragmenting into two incompatible standards. On one side, Anthropic's MCP (Model Context Protocol) lets AI models use tools. On the other, Google's A2A (Agent-to-Agent) lets agents collaborate. They can't talk to each other.

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