Introduction
A2X is an ecosystem that infinitely extends the capabilities of Personal Agents by combining A2A protocol with X402 on-chain payments.
The Problem
Today's Personal Agents -- Claude Code, Codex, and other platform-agnostic agents -- are confined to pre-registered tools and credentials. They can only use what's been explicitly configured for them.
The Solution
A2X removes this limitation by combining two open protocols:
- A2A (Agent-to-Agent) -- Google's open protocol for dynamic agent discovery and inter-agent communication via JSON-RPC 2.0.
- X402 -- Coinbase's protocol reviving HTTP 402 "Payment Required" for on-chain micropayments with USDC on Base.
Together, they let any Personal Agent discover agents on the fly and pay for their services with cryptocurrency -- using the entire internet as its toolbox.
How It Works
1
Discover
Personal Agent searches the Agent Registry for a service agent.
2
Negotiate
Service agent responds with X402 payment requirements.
3
Pay & Execute
Micropayment signed and settled on-chain. Result delivered.
Ecosystem Components
| Component | Description | Status |
|---|---|---|
| Agent Registry | Central directory for agent discovery | Live |
| A2X CLI | Tool interface for Personal Agents | Live |
| File Storage Agent | File upload/download reference agent | Live |
| Text-to-Image Agent | Image generation reference agent | Live |
| GitHub Repo Analyzer | Code analysis reference agent | In Progress |
| Code Review Agent | LLM-powered code review | Planned |
| On-chain Data Agent | Wallet/transaction analysis | Planned |
Tech Stack
| Area | Technology |
|---|---|
| Protocols | A2A (Agent-to-Agent), X402 |
| Payment Network | Base Sepolia (USDC) → Base Mainnet |
| Infrastructure | Fly.io |
| AI Runtime | Flexible (Google ADK, OpenAI, Claude, or custom) |