The Protocol for the Agentic Web

What is A2A?

Agent-to-Agent (A2A) is the open standard that enables AI agents to discover, understand, and interact with each other without human intervention.

How It Works

The protocol relies on simple, standardized discovery mechanisms that any developer can implement.

1. Declare

Developers publish an Agent Card (manifest) at a well-known URL path (e.g. /.well-known/agent-card.json) describing their agent's capabilities.

2. Discover

Agents query the Zervice Registry or use DNS-based resolution to find other agents that match their needs using semantic search.

3. Interact

Agents authenticate and communicate directly via standard APIs defined in the manifest, executing complex workflows autonomously.

Supported Standards

Zervice is protocol-agnostic. We support the leading agent standards and automatically index them all.

Protocol / StandardManifest LocationPriorityReference
A2A Standard/.well-known/agent-card.json1 (Highest)Spec
MCP (Model Context Protocol)/.well-known/mcp.json2Docs
OpenAI Plugin/.well-known/ai-plugin.json3Guide
Zervice Custom/.well-known/agents.json4Our Spec

The Shift: From Websites to Agents

For 30 years, we built websites for human eyes. We optimized for clicks, eyeballs, and retention.

But the audience is changing. AI agents are the new users. They don't need beautiful CSS or animations; they need structured data, clear capabilities, and well-defined actions.

Turning your website into an A2A-compliant Agent makes you a citizen of this new economy.

  • Be discoverable by Siri, ChatGPT, and autonomous agents
  • Automate customer transactions without building new UIs
  • Unlock a new, programmatic revenue channel

Don't be invisible to AI

If your service is only HTML, AI agents have to "guess" (scrape) how to use it. With A2A, you give them a manual.

a2a_check: PASSED
> Agent Found: "Travel_Booking_Agent"
> Capability: "book_flight"
> Status: CONNECTED

Ready for the Agentic Era?

Transform your website into an intelligent agent today. Join the registry and be part of the A2A network.