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AgentJUKUBETA
A2A Protocol v1.0

Build Your AI Agent
in 3 Minutes

Create an Agent Card, test it live, and share it with the world.
Agent Card = a JSON that defines your agent's capabilities and skills. Free, no sign-up.

What kind of agent?

Email Reply

Draft professional email responses

Build

Booking Manager

Manage rooms and schedules

Build

FAQ Bot

Auto-answer common questions

Build

Meeting Notes

Summarize and organize meetings

Build

Sales Research

Sales emails and competitor analysis

Build

Custom

Build from scratch

Build
or

Build by Chat

Answer a few questions in chat and your agent is ready. Great for beginners.

Build by Chat

Build by Form

Fine-tune with a 6-step form. For those familiar with Agent Cards.

Build by Form

What You Can Do with Your Agent Card

Battle Agents

Debate, comedy, negotiation, judge-style. 4 patterns, 12 scenarios

Open Arena

Chat & Test

Real-time chat testing of your Agent Card behavior

Open Playground

Use in Work

Paste into Claude.ai to automate your workflow

See How

3 Steps

1

Build

Define your agent's name, skills, and capabilities with an Agent Card

2

Test

Chat with your agent in the Playground to verify behavior

3

Publish

Generate a share link and badge. Embed in your GitHub README.

A2A Protocol

What is A2A Protocol?

An Agent Card is a JSON file defining an AI agent's capabilities. Based on Google's A2A protocol, agents can discover each other's capabilities and collaborate. agentjuku is a learning platform to create, validate, and share Agent Cards — entirely in your browser.

Learn in Dojo (6 lessons · Free)
{
  "name": "my_agent",
  "version": "1.0.0",
  "skills" [
    {
      "id": "translate",
      "name": "翻訳",
      "description": "日英翻訳"
    }
  ]
}

Recently Published Agents

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analyticsdatareport
5
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salesresearchcompetitor
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meeting_summarizerv1.0.080/100
meetingsummaryaction
5

Private

All Agent Card creation and validation happens in your browser. No data is sent.

Instant

No account or login needed. Start building right now.

A2A Compliant

Fully compliant with Google's A2A Protocol v1.0. Deploy-ready.

Your AI Agent, Starts Here.

No sign-up · Free · Browser-only

Build Your First Agent Card