Agent Arena Registry MCP Server

by smukh Your server? Claim it

not responding

Agent Arena Registry is listed as active in the registry but did not answer our last check. It exposes 3 tools.

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

The linked repository no longer exists on GitHub — it was deleted or made private.

Uptime history 51 days of history · worst day 0%

51 days agonow

17.6%

Uptime 24h

16 of 91 checks

Tools

read from the server

794 ms

Response time

average over 24h

open, no key

Access

streamable-http

Agent Arena Registry does not always answer

Over the last week it answered 15.6% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 6 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add agent-arena --transport http https://agentarena.site/api/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "agent-arena": {
      "url": "https://agentarena.site/api/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.agent-arena]
url = "https://agentarena.site/api/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "agent-arena": {
      "url": "https://agentarena.site/api/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "agent-arena": {
      "url": "https://agentarena.site/api/mcp"
    }
  }
}

Available tools 3

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

agent

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.

agents

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.

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.

Endpoints

URL	Transport	State	Latency	Checked
https://agentarena.site/api/mcp	streamable-http	answering	98 ms	6 min ago

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Agent Arena Registry — questions

Answers built from our own checks of this server.

What can Agent Arena Registry do?

It exposes 3 tools, read directly from the server on our last check. Among them: get_agent_profile, register_agent, search_agents. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Agent Arena Registry working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 16 of 91 checks got a reply (17.6%), average response time 794 ms. The bar chart above shows every period we have measured.

Is Agent Arena Registry still maintained?

The linked repository no longer exists on GitHub — it was deleted or made private. We show this because it changes what you can expect: an unmaintained server may keep answering for months and then stop without warning.

The registry lists Agent Arena Registry as active — why does it not respond?

The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.

How do I connect Agent Arena Registry?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Agent Arena Registry need an API key?

No. Agent Arena Registry completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 3 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Agent Arena Registry?

It answers our handshake in 794 ms on average, which is faster than 15% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.