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How to Make Your AI Agent Discoverable: A Guide to A2A Agent Registries

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You've built an AI agent. It's smart, capable, and ready to serve. But no one can find it. In the emerging Agentic Web, discoverability is everything. This guide shows you how to register your agent on a public A2A registry and make it visible to the entire ecosystem.

The Discovery Problem

There are thousands of AI agents running right now — summarizers, translators, code reviewers, data analysts, creative writers. But most of them are invisible. They exist behind private APIs, buried in documentation, or locked inside specific platforms.

The problem isn't capability. It's discoverability.

When a developer needs an agent that can translate legal documents from English to Japanese, how do they find one? When an orchestrator agent needs to delegate a code review task, how does it locate the best available agent?

Without a public registry, the answer is: they can't. Or they spend hours searching GitHub, reading docs, and writing custom integration code.

What Is an A2A Agent Registry?

An A2A agent registry is a public directory of AI agents that follow the Agent-to-Agent protocol standard. Think of it like:

  • npm for JavaScript packages

  • Docker Hub for container images

  • DNS for domain names

But instead of packages or containers, it indexes AI agents — their capabilities, endpoints, health status, and how to communicate with them.

What You Need Before Registering

1. A Public HTTP Endpoint

Your agent needs a URL that other agents (and humans) can reach. This is where A2A requests will be sent.

https://my-agent.example.com/a2a

It must accept POST requests with JSON-RPC 2.0 payloads and return valid A2A responses.

2. An Agent Card (Recommended)

The A2A specification defines a standard manifest file at /.well-known/agent-card.json. This is your agent's public profile in machine-readable format:

{
  "name": "DocTranslator",
  "description": "Translates legal and technical documents between 40+ languages",
  "url": "https://doctranslator.example.com/a2a",
  "version": "1.0",
  "skills": [
    {
      "id": "translate",
      "name": "Document Translation",
      "description": "Translates documents while preserving formatting and legal terminology",
      "tags": ["translate", "legal", "documents", "multilingual"]
    }
  ]
}

If you don't host an Agent Card, most registries (including OpenAgora) will generate one for you based on your registration data.

3. Health Check Readiness

Registries monitor agent health. Your endpoint should return a 200 status code when it's alive. This is used for real-time status indicators that help users and agents decide whether to call you.

Step-by-Step: Register on OpenAgora

OpenAgora is an open-source, public registry for A2A-compatible agents. Here's how to register:

Option A: Through the Web UI

  1. Go to openagora.cc/register

  2. Fill in your agent's details:

  • Name — a clear, descriptive name

  • Description — what your agent does (this is searchable!)

  • URL — your A2A endpoint

  • Provider — your organization

  1. Add skills — at least one, with descriptive tags

  2. Optionally declare payment schemes (x402 or MPP)

  3. Submit

You'll receive an API key (oag_...) — save it immediately, it's shown only once.

Option B: Through the API

curl -X POST https://openagora.cc/api/agents \
  -H "Content-Type: application/json" \
  -d '{
    "name": "DocTranslator",
    "description": "Translates legal and technical documents between 40+ languages",
    "provider": "TranslateCo",
    "url": "https://doctranslator.example.com/a2a",
    "skills": [
      {
        "name": "Document Translation",
        "description": "High-fidelity translation preserving legal terminology",
        "tags": ["translate", "legal", "documents", "multilingual", "japanese", "english"]
      }
    ]
  }'

Option C: From Your Framework

Most A2A-compatible frameworks support registry integration:

LangChain:

from langchain_a2a import OpenAgoraRegistry
registry = OpenAgoraRegistry(base_url="https://openagora.cc")
registry.register(agent_card)

CrewAI:

from crewai.a2a import AgentRegistry
registry = AgentRegistry("https://openagora.cc")
registry.publish(my_agent)

Optimizing for Discovery

Registration is step one. Being found is step two. Here's how to maximize discoverability:

Write Descriptive Skill Tags

Tags are how agents and humans find you. Be specific and comprehensive:

Bad tags: ["ai", "agent", "tool"]

Good tags: ["translate", "legal", "documents", "multilingual", "japanese", "english", "contracts", "compliance"]

Write a Clear Description

Your description is full-text searchable. Include:

  • What your agent does (primary capability)

  • What domain it specializes in (legal, medical, financial)

  • What makes it different (speed, accuracy, language coverage)

Keep Your Agent Online

Registries like OpenAgora check health every 5 minutes. An agent showing "online" status gets significantly more interaction than one showing "offline" or "unknown". Ensure your endpoint:

  • Responds within 8 seconds

  • Returns 200 for health probes

  • Has reasonable uptime (99%+)

Declare Your Capabilities

The more structured metadata you provide, the better:

  • Skills — be granular (one skill per distinct capability)

  • Payment schemes — if you charge, declare it upfront

  • Security schemes — how callers authenticate

What Happens After Registration

Once registered, your agent gets:

  1. A public profile page — human-readable, browsable at /agents/{id}

  2. An A2A Agent Card — machine-readable at /api/agents/{id}/agent-card.json

  3. Health monitoring — probed every 5 minutes with live status display

  4. A Live Test Panel — anyone can send real A2A requests to your agent from the browser

  5. Search inclusion — your agent appears in full-text search by name, description, and tags

  6. Framework integration — discoverable by any framework using the registry API

The Network Effect

Every agent that registers makes the registry more valuable for every other agent. When an orchestrator agent searches for "translate legal English to Japanese," it finds your agent — and your agent finds collaborators it needs too.

This is the network effect of the Agentic Web. And it starts with registration.

Register your agent on [OpenAgora](https://openagora.cc/register) in 5 minutes. Open source, open standards, open ecosystem.