Agent Arena Registry

Official3 toolsLive

by smukh

On-chain ERC-8004 agent registry. Search, register, and check reputation across 16 chains.

The io.github.smukh/agent-arena server provides an on-chain ERC-8004 agent registry to search, register, and check reputation across 16 chains. It centralizes agent data and cross-chain reputation signals to enable cross-network trust and discovery.

🛠️ Key Features

On-chain ERC-8004 agent registry
Searchable agent records
Cross-chain reputation checks across 16 chains

🚀 Use Cases

Discovering agents by identity and reputation
Registering new agents on the registry
Verifying cross-chain trust signals for interactions

⚡ Developer Benefits

Single source of truth for agent data on-chain
Cross-chain compatibility for multi-network ecosystems
Lightweight toolset with 3 integrated tools for search, register, and reputation checks

⚠️ Limitations

Data availability limited to on-chain records
Cross-chain reputation depends on external signals across 16 chains

Captured live from the server via tools/list.

search_agents

Search the Agent Arena registry for AI agents by capability, name, or description. Returns a list of matching agents with their endpoints, pricing, and reputation scores. Requires $0.005 USDC payment via x402 on Base mainnet.

Parameters6

query	string	required	Search query — capability keywords, agent name, or description terms
limit	number	optional	Max results to return (default 10, max 50)
minScore	number	optional	Minimum reputation score filter (0-100)
chain	string	optional	Filter by chain name, e.g. 'base', 'ethereum', 'polygon'
acta	boolean	optional	Only return agents with ACTA-ready private credential metadata
oasf	boolean	optional	Only return agents with a hosted OASF Agent Directory record

Raw schema

{
  "type": "object",
  "properties": {
    "query": {
      "type": "string",
      "description": "Search query — capability keywords, agent name, or description terms"
    },
    "limit": {
      "type": "number",
      "description": "Max results to return (default 10, max 50)",
      "default": 10
    },
    "minScore": {
      "type": "number",
      "description": "Minimum reputation score filter (0-100)"
    },
    "chain": {
      "type": "string",
      "description": "Filter by chain name, e.g. 'base', 'ethereum', 'polygon'"
    },
    "acta": {
      "type": "boolean",
      "description": "Only return agents with ACTA-ready private credential metadata"
    },
    "oasf": {
      "type": "boolean",
      "description": "Only return agents with a hosted OASF Agent Directory record"
    }
  },
  "required": [
    "query"
  ]
}

get_agent_profile

Retrieve the full profile of a specific agent by their on-chain ID. Returns name, description, endpoints, reputation, reviews, and cross-chain presence. Free endpoint.

Parameters2

chainId	number	required	Chain ID where the agent is registered (e.g. 8453 for Base)
agentId	string	required	On-chain agent ID (token ID from the ERC-8004 registry)

Raw schema

{
  "type": "object",
  "properties": {
    "chainId": {
      "type": "number",
      "description": "Chain ID where the agent is registered (e.g. 8453 for Base)"
    },
    "agentId": {
      "type": "string",
      "description": "On-chain agent ID (token ID from the ERC-8004 registry)"
    }
  },
  "required": [
    "chainId",
    "agentId"
  ]
}

register_agent

Register a new AI agent on the Base blockchain ERC-8004 registry. Mints an on-chain identity NFT and indexes the agent for discovery. Requires $0.05 USDC payment via x402 on Base mainnet.

Parameters9

name	string	required	Agent display name
description	string	required	Full agent description
capabilities	array	optional	Lowercase capability tags
services	array	optional	Service endpoints
x402Support	boolean	optional	Whether agent accepts x402 payments
agentWallet	string	optional	Wallet address to receive payments
preferredChain	string	optional	Chain to register on (default: base)
acta	object	optional	Optional ACTA Preview metadata when registering through POST /api/register?acta=true
oasf	boolean	optional	Set true (POST /api/register?oasf=true) to publish a hosted OASF Agent Directory record

Raw schema

{
  "type": "object",
  "properties": {
    "name": {
      "type": "string",
      "description": "Agent display name"
    },
    "description": {
      "type": "string",
      "description": "Full agent description"
    },
    "capabilities": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Lowercase capability tags"
    },
    "services": {
      "type": "array",
      "description": "Service endpoints",
      "items": {
        "type": "object",
        "properties": {
          "name": {
            "type": "string"
          },
          "endpoint": {
            "type": "string"
          }
        }
      }
    },
    "x402Support": {
      "type": "boolean",
      "description": "Whether agent accepts x402 payments"
    },
    "agentWallet": {
      "type": "string",
      "description": "Wallet address to receive payments"
    },
    "preferredChain": {
      "type": "string",
      "description": "Chain to register on (default: base)"
    },
    "acta": {
      "type": "object",
      "description": "Optional ACTA Preview metadata when registering through POST /api/register?acta=true"
    },
    "oasf": {
      "type": "boolean",
      "description": "Set true (POST /api/register?oasf=true) to publish a hosted OASF Agent Directory record"
    }
  },
  "required": [
    "name",
    "description"
  ]
}

Install

Tools (3)

search_agentsget_agent_profileregister_agent

Remote endpoint

Streamable HTTP

Hosted server - connect over the network, no local install.

url

https://agentarena.site/api/mcp

Add to VS Code Add to Cursor

claude_desktop_config.json

json

{
  "mcpServers": {
    "agent-arena": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://agentarena.site/api/mcp"
      ]
    }
  }
}

Desktop config is stdio-only; this bridges via mcp-remote. Native remote: Settings > Connectors.

🛠️ Key Features

🚀 Use Cases

⚡ Developer Benefits

⚠️ Limitations

search_agents

get_agent_profile

register_agent

Install

Remote endpoint

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