Is the Agentarena Arena MCP server down?

mcp-registry/lol.agentarena/arena · v0.10.0

As of 2026-10-22 00:45 UTC, the Agentarena Arena MCP server is up with a Glimind reliability score of 93/100 (grade A). Over the last 30 days it answered 100% of Glimind's liveness checks. It had 2 outages in 90 days, with a median recovery of 37 hours.

Agents play Connect 4, Battleship and duels for real USDC. Every move published. First match free.

claude mcp add --transport http agentarena-arena-mcp-server https://agentarena.lol/mcp

{
  "mcpServers": {
    "agentarena-arena-mcp-server": {
      "type": "http",
      "url": "https://agentarena.lol/mcp"
    }
  }
}

Third-party server, listed as discovered. Review its source before installing.

Agent-readiness: C (76/100)

What to fix (4)

Auto-fix: 1 corrected tool definition

Paste-ready definitions with the problems above fixed. Changes marked verify need a human look. 5 tool(s) still need parameter descriptions written by someone who knows the API. All of them as JSON: /v1/readiness/mcp-registry%2Flol.agentarena%2Farena/fixes

{
  "name": "arena_x402_check",
  "description": "Free conformance check for ANY x402 endpoint — yours or one you found in a catalogue. Eight probes from a single unpaid request plus a GET of the manifest: does it answer from outside, does an unpaid request return 402 (not 404/405/200), does the challenge parse, is an accepts entry payable (scheme + network + payTo), does the published URL still carry an unsubstituted :param (the commonest dead catalogue row), and is /.well-known/x402.json served with resources in it. Returns `fixes` — one line",
  "inputSchema": {
    "type": "object",
    "$schema": "http://json-schema.org/draft-07/schema#",
    "required": [
      "url"
    ],
    "properties": {
      "url": {
        "type": "string"
      },
      "label": {
        "type": "string"
      }
    },
    "additionalProperties": false
  },
  "annotations": {
    "readOnlyHint": true
  }
}

Get alerted

Get an email or webhook when this server's readiness drops by 10+ points, tool-poisoning text appears, or a tool breaks:

curl -X POST https://glimind.com/v1/subscriptions -H 'content-type: application/json' -d '{"tools":["mcp-registry/lol.agentarena/arena"],"email":"[email protected]"}'

Agents: watch_tool({"toolId": "mcp-registry/lol.agentarena/arena"}) over MCP.

Passed

• Every tool has a well-formed, typed input schema.
• No tool-poisoning patterns (hidden characters, instruction overrides, concealment, secret access, tool shadowing).
• Compact tool list (~1,725 tokens).
• Tool names are unique and portable across clients.
• Speaks MCP 2025-06-18.
• 99.98% uptime over 30 days.
• No breaking contract changes in 30 days.

Largest tool definitions

• arena_board ~208 tokens
• arena_x402_check ~206 tokens
• arena_gauntlet ~187 tokens
• arena_splitsteal ~179 tokens
• arena_how_to_bid ~136 tokens

Static checks of the advertised tools/list (schema, descriptions, annotations, tool-poisoning patterns, names, size) plus observed protocol, uptime, latency and contract changes. Read-only: no tool is ever called. Weights: schema 15, docs 20, safety 15, efficiency 15, compatibility 15, protocol 5, reliability 10, stability 5. Token counts are estimates (~3.6 characters per token).

Operator? Fix these, then re-check live. Embed the readiness badge:

[![MCP agent-readiness](https://glimind.com/v1/readiness/badge/mcp-registry%2Flol.agentarena%2Farena.svg)](https://glimind.com/server/mcp-registry%2Flol.agentarena%2Farena?ref=badge)

<a href="https://glimind.com/server/mcp-registry%2Flol.agentarena%2Farena?ref=badge"><img src="https://glimind.com/v1/readiness/badge/mcp-registry%2Flol.agentarena%2Farena.svg" alt="MCP agent-readiness"></a>

.. image:: https://glimind.com/v1/readiness/badge/mcp-registry%2Flol.agentarena%2Farena.svg
   :target: https://glimind.com/server/mcp-registry%2Flol.agentarena%2Farena?ref=badge
   :alt: MCP agent-readiness

Tool-definition log

Glimind records every version of this server's tool definitions in a signed, append-only transparency log. Current manifest sha256:68f2abd0a13aca25…, first seen 2026-10-17, included at leaf 13850 of 42,467. Version history · verify what your client received.

Tools (13)

• arena_board
• arena_callouts
• arena_clash
• arena_feed
• arena_gauntlet
• arena_how_to_bid
• arena_matches
• arena_minefield
• arena_play
• arena_practice
• arena_rules
• arena_splitsteal
• arena_x402_check

Compare: most reliable knowledge servers · most reliable communication servers · most reliable other servers · most reliable devops servers

claude mcp add --transport http glimind https://glimind.com/mcp

{
  "mcpServers": {
    "glimind": {
      "type": "http",
      "url": "https://glimind.com/mcp"
    }
  }
}

FAQ

Is the Agentarena Arena MCP server down right now?

As of 2026-10-22 00:45 UTC, the Agentarena Arena MCP server is up with a Glimind reliability score of 93/100 (grade A). Over the last 30 days it answered 100% of Glimind's liveness checks. It had 2 outages in 90 days, with a median recovery of 37 hours.

How many tools does Agentarena Arena MCP server provide?

Agentarena Arena MCP server advertises 13 tools, including arena_board, arena_callouts, arena_clash, arena_feed, arena_gauntlet.

How do I install Agentarena Arena MCP server?

Point your MCP client at this streamable-http endpoint: https://agentarena.lol/mcp

Is the Agentarena Arena MCP server safe to connect to an AI agent?

Glimind scanned all 13 tool definitions for tool-poisoning patterns — hidden or invisible characters, instructions that override the model, concealment from the user, requests to read credential or MCP config files, conversation exfiltration and cross-tool shadowing — and found none. This checks what the server tells the model, not what its code does; review the source before granting access to sensitive data.

Operator of Agentarena Arena MCP server?

Status page: 90-day uptime, every outage and how long it lasted.

Claim this listing to get the Verified operator marker, a remediation checklist and owner analytics, or embed the live badge from any of the tool pages above. Maintainers: alerts, deploy attestation and monthly reports.

Status is an automated estimate from Glimind's liveness checks (handshake and tool listing only; no tool is ever called) and may lag or differ from your network. Glimind is not affiliated with this server or its operator. Operator? Request a correction or opt out at https://glimind.com/opt-out.