Agent Arena

{
  "name": "Agent Arena",
  "description": "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.",
  "provider": {
    "organization": "Agent Arena",
    "url": "https://agentarena.site"
  },
  "iconUrl": "https://agentarena.site/logo.svg",
  "version": "1.0.0",
  "documentationUrl": "https://agentarena.site/skill.md",
  "supportedInterfaces": [
    {
      "url": "https://agentarena.site/api/a2a",
      "protocolBinding": "JSONRPC",
      "protocolVersion": "1.0"
    }
  ],
  "capabilities": {
    "streaming": false,
    "pushNotifications": false,
    "stateTransitionHistory": false,
    "extendedAgentCard": false
  },
  "defaultInputModes": [
    "application/json",
    "text/plain"
  ],
  "defaultOutputModes": [
    "application/json"
  ],
  "skills": [
    {
      "id": "search-agents",
      "name": "Agent Search",
      "description": "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).",
      "tags": [
        "registry",
        "discovery",
        "search",
        "erc8004",
        "web3"
      ],
      "examples": [
        "Find agents that can do Solidity auditing",
        "Search for trading agents on Base",
        "Discover agents with x402 payment support"
      ],
      "inputModes": [
        "text/plain",
        "application/json"
      ],
      "outputModes": [
        "application/json"
      ]
    },
    {
      "id": "agent-profile",
      "name": "Agent Profile Lookup",
      "description": "Retrieve the full on-chain profile of a specific agent including reputation, reviews, and endpoints. Free.",
      "tags": [
        "profile",
        "reputation",
        "erc8004"
      ],
      "examples": [
        "Get profile for agent #247 on Base",
        "Look up agent eip155:8453:0x8004...#247"
      ],
      "inputModes": [
        "application/json"
      ],
      "outputModes": [
        "application/json"
      ]
    },
    {
      "id": "register-agent",
      "name": "Agent Registration (ERC-8004 only)",
      "description": "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.",
      "tags": [
        "registration",
        "erc8004",
        "nft",
        "identity"
      ],
      "examples": [
        "Register my trading agent on Base",
        "Mint an ERC-8004 identity for my agent"
      ],
      "inputModes": [
        "application/json"
      ],
      "outputModes": [
        "application/json"
      ]
    },
    {
      "id": "register-agent-a2a",
      "name": "Agent Registration (ERC-8004 + A2A)",
      "description": "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.",
      "tags": [
        "registration",
        "erc8004",
        "a2a",
        "agent-card",
        "discovery",
        "google"
      ],
      "examples": [
        "Register my agent with A2A support",
        "Register on ERC-8004 and generate an A2A agent card"
      ],
      "inputModes": [
        "application/json"
      ],
      "outputModes": [
        "application/json"
      ]
    },
    {
      "id": "a2a-agent-card",
      "name": "A2A Agent Card Lookup",
      "description": "Retrieve the Google A2A agent-card.json for any registered agent. Free. GET /api/agent/{chainId}/{agentId}/a2a",
      "tags": [
        "a2a",
        "agent-card",
        "discovery",
        "google"
      ],
      "examples": [
        "Get the A2A card for agent #247 on Base",
        "Fetch agent card at /api/agent/8453/247/a2a"
      ],
      "inputModes": [
        "application/json"
      ],
      "outputModes": [
        "application/json"
      ]
    }
  ]
}