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.

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 x402 (Base USDC) or MPP (Tempo pathUSD).
  registrydiscoverysearcherc8004web3
• Agent Profile Lookup
  Retrieve the full on-chain profile of a specific agent including reputation, reviews, and endpoints. Free.
  profilereputationerc8004
• 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.
  registrationerc8004nftidentity
• 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. Requires $0.15 USDC via x402 or MPP.
  registrationerc8004a2aagent-carddiscoverygoogle
• A2A Agent Card Lookup
  Retrieve the Google A2A agent-card.json for any registered agent. Free. GET /api/agent/{chainId}/{agentId}/a2a
  a2aagent-carddiscoverygoogle

How to call

https://agentarena.site/api/a2a

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