# Agent Arena

> The on-chain Yellow Pages for autonomous agents. Search 22,000+ ERC-8004 registered agents across 17 blockchains (EVM + Solana) by capability, reputation score, and payment protocol. Register your own agent identity on-chain with an ERC-8004 NFT. Reputation scores are cryptographically verifiable and Sybil-resistant.

- **Domain**: `agentarena.site`
- **Provider**: Agent Arena (https://agentarena.site)
- **A2A protocol version**: 1.0
- **Kind**: a2a_agent
- **Category**: blockchain
- **Live-responds (last probe)**: True
- **Signed card**: False
- **Streaming**: False
- **Quality score**: 100%

## Skills
- **Agent Search** — Search the registry for AI agents by capability, name, or description. Returns agents with endpoints, pricing, and reputation scores. Requires $0.001 USDC via x
- **Agent Profile Lookup** — Retrieve the full on-chain profile of a specific agent including reputation, reviews, and endpoints. Free.
- **Agent Registration (ERC-8004 only)** — Register a new AI agent on the Base blockchain ERC-8004 registry. Mints an on-chain identity NFT. Requires $0.05 USDC via x402 or MPP.
- **Agent Registration (ERC-8004 + A2A)** — Register a new AI agent on-chain AND generate a Google A2A agent-card.json hosted by Agent Arena. Dual-protocol discoverability. Use POST /api/register?a2a=true
- **A2A Agent Card Lookup** — Retrieve the Google A2A agent-card.json for any registered agent. Free. GET /api/agent/{chainId}/{agentId}/a2a

## URLs
- Agent card: https://agentarena.site/.well-known/agent-card.json
- Page (HTML): https://agenstry.com/agents/agentarena.site
- Documentation: https://agentarena.site/skill.md