Agent Arena Registry

Official3 toolsLive

by smukh

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

io.github.smukh/agent-arena — MCP Server

This MCP server provides access to an on-chain ERC-8004 agent registry. It supports searching agents, registering new entries, and checking reputation. The registry covers deployments across 16 chains, enabling cross-chain lookup and reputation verification.

🛠️ Key Features

On-chain ERC-8004 agent registry
Search agents
Register agents
Check agent reputation
Spans 16 chains

🚀 Use Cases

Find and list agent entries across multiple chains
Register new agents into the ERC-8004 registry
Verify reputation for agents on supported networks

⚡ Developer Benefits

Cross-chain agent search and reputation checks across 16 chains
Dedicated MCP tooling count: 3 tools

⚠️ Limitations

Described functionality is limited to search, register, and reputation checking in the ERC-8004 registry; no other capabilities are provided in the available data.

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.

io.github.smukh/agent-arena — MCP Server

🛠️ Key Features

🚀 Use Cases

⚡ Developer Benefits

⚠️ Limitations

search_agents

get_agent_profile

register_agent

Install

Remote endpoint

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