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Arena Predictions MCP Setup & Guide

MCP ServerMCP RegistryOfficial

com.arena-predictions/arena · v0.5.0

Paper trade prediction markets at live prices from your AI agent, and score every trade.

View on MCP Registry ↗

Copy the install config on this page first, then verify docs and permissions upstream.

Overview

Paper trade prediction markets at live prices from your AI agent, and score every trade. Arena Predictions is a MCP Server listed from MCP Registry. Transports: stdio. This page includes an overview, setup tutorial, install commands, and use cases for Trae, Tongyi Lingma, Cursor, Claude Code, and VS Code.

AgentHub Verified AvailabilityTested & Ready

Automated pipeline validated install commands, protocol & client compatibility

Verified At2026-10-04
Install Snippets TestedCLI & JSON config syntax verified
Protocol Handshake ReadyComplies with JSON-RPC 2.0 specifications
Origin Registry ActiveSourced from official-mcp-registry
Verified ClientsClaude Code、Claude Desktop、Cursor 等
Security Tier: A+ 级 · 官方认证推荐 (A+)·Maintained by official/verified teams, audited for standard MCP protocol compliance.

Copy by platform

Choose your platform

  1. Open or create .cursor/mcp.json in your project root
  2. Click Copy config and paste; merge only this mcpServers entry if others exist
  3. Replace <placeholders> in env with real secrets (see Environment variables below)
  4. Save, then Cmd+Shift+P → Reload Window

Pre-fill Environment Variables (Optional)

Privacy Guarantee: Keys are replaced 100% locally in your browser memory and are NEVER uploaded or stored on any server.
Click to copy snippet
{
  "mcpServers": {
    "arena": {
      "command": "npx",
      "args": [
        "-y",
        "arena-mcp-server"
      ]
    }
  }
}

Setup tutorial

  1. Open the Arena Predictions page and confirm this MCP Server (source: MCP Registry).
  2. Copy the Cursor, Claude Code, or VS Code snippet.
  3. Merge it into mcpServers and replace env placeholders with real secrets.
  4. Reload the window, then call the MCP tools from your agent chat.

Install commands

Install commands and setup steps are in the HTML so search engines and no-JS browsers can read them without running client JavaScript.

Claude Code (local)

  1. Install Claude Code CLI
  2. Copy the command below, replace <placeholders> with real env values, then run in terminal
  3. See Environment variables below if listed
claude mcp add arena -- npx -y arena-mcp-server

Cursor — .cursor/mcp.json (local)

  1. Open or create .cursor/mcp.json in your project root
  2. Click Copy config and paste; merge only this mcpServers entry if others exist
  3. Replace <placeholders> in env with real secrets (see Environment variables below)
  4. Save, then Cmd+Shift+P → Reload Window
{
  "mcpServers": {
    "arena": {
      "command": "npx",
      "args": [
        "-y",
        "arena-mcp-server"
      ]
    }
  }
}

VS Code — .vscode/mcp.json (local)

  1. Install GitHub Copilot in VS Code with MCP support
  2. Open or create .vscode/mcp.json in your project root
  3. Click Copy config and paste; merge only this mcpServers entry if others exist
  4. Replace <placeholders> in env with real secrets
  5. Save and Developer: Reload Window
{
  "mcpServers": {
    "arena": {
      "command": "npx",
      "args": [
        "-y",
        "arena-mcp-server"
      ]
    }
  }
}

Claude Desktop — claude_desktop_config.json (local)

  1. Open Claude Desktop claude_desktop_config.json (see remote guide for paths)
  2. Click Copy config and merge under mcpServers
  3. Replace <placeholders> in env with real secrets
  4. Fully quit and restart Claude Desktop
{
  "mcpServers": {
    "arena": {
      "command": "npx",
      "args": [
        "-y",
        "arena-mcp-server"
      ]
    }
  }
}

Trae — .trae/mcp.json (local)

  1. Trae → Settings → MCP, or edit .trae/mcp.json / global mcp.json
  2. Click Copy config and merge mcpServers
  3. Replace <placeholders> in env with real secrets
  4. Save and reload Trae
{
  "mcpServers": {
    "arena": {
      "command": "npx",
      "args": [
        "-y",
        "arena-mcp-server"
      ]
    }
  }
}

Cherry Studio — MCP settings (local)

  1. Cherry Studio → Settings → MCP Servers → Add (STDIO)
  2. Or import JSON: click Copy config and merge mcpServers
  3. Replace <placeholders> in env; ensure Node.js / uv (npx, uvx) are installed
  4. Enable the server and check tools load
{
  "mcpServers": {
    "arena": {
      "command": "npx",
      "args": [
        "-y",
        "arena-mcp-server"
      ]
    }
  }
}

Tongyi Lingma — MCP config (local)

  1. Lingma Settings → MCP → + → STDIO or config file
  2. Click Copy config and merge mcpServers
  3. Replace <placeholders> in env; need Node.js 18+ (npx) or uv (uvx)
  4. Confirm connected before using tools in agent chat
{
  "mcpServers": {
    "arena": {
      "command": "npx",
      "args": [
        "-y",
        "arena-mcp-server"
      ]
    }
  }
}

Windsurf — mcp_config.json (local)

  1. Edit ~/.codeium/windsurf/mcp_config.json
  2. Click Copy config and merge mcpServers (stdio same as Cursor)
  3. Replace <placeholders> in env, save, refresh Cascade
{
  "mcpServers": {
    "arena": {
      "command": "npx",
      "args": [
        "-y",
        "arena-mcp-server"
      ]
    }
  }
}

Cline — MCP Servers (local)

  1. Cline panel → Settings → MCP Servers
  2. Click Copy config and merge
  3. Replace <placeholders> in env, then save
{
  "mcpServers": {
    "arena": {
      "command": "npx",
      "args": [
        "-y",
        "arena-mcp-server"
      ]
    }
  }
}

WorkBuddy — .workbuddy/mcp.json (local)

  1. Edit ~/.workbuddy/mcp.json (user) or project .workbuddy/mcp.json
  2. Or Plugins → MCP Servers → Configure MCP and paste the JSON below
  3. Replace <placeholders> in env; on Windows prefer absolute paths for command/scripts
  4. Save, restart WorkBuddy, confirm connector status is green
{
  "mcpServers": {
    "arena": {
      "command": "npx",
      "args": [
        "-y",
        "arena-mcp-server"
      ]
    }
  }
}

Troubleshooting & Common ErrorsFAQ

Common connection errors and verified fixes for Arena Predictions

Getting 'connection closed' or exit code 1 in Cursor / Claude Code for Arena Predictions?

Usually caused by missing runtime paths or IDE environment inheritance. Fix steps: 1. Verify Node.js 18+ (npx) or Python 3.10+ (uvx) is installed; 2. Run 'which npx' or 'which uvx' in terminal, and replace 'command' with absolute path; 3. Reload or restart the client window after modifying config.

Fix Snippet
# Check binary path in terminal:
which npx
node -v
Getting 'spawn npx ENOENT' or 'command not found'?

The editor background process does not inherit your full terminal PATH. Solution: Globally install the package, or set the absolute binary path (e.g. C:\Program Files\nodejs\npx.cmd on Windows, or /usr/local/bin/npx on macOS).

Missing required environment variable or authentication failure?

Arena Predictions requires environment variables (ARENA_MCP_ALLOW_TRADE、ARENA_ALLOW_RESET、ARENA_CREDENTIALS_FILE). Ensure you have added valid keys under the 'env' object in your config file without trailing whitespace.

Fix Snippet
// .cursor/mcp.json 或 claude_desktop_config.json
{
  "env": {
    "API_KEY": "your_actual_key_here"
  }
}
Still not connecting? Read the MCP troubleshooting guide →

Tool Mock Playground

Sandbox

Arena Predictions Tool Interface Simulation · Preview tool schema & outputs without local runtime

Sandbox Ready
fn: arenaExecute the core tool interface of Arena Predictions
Request ArgumentsJSON Schema
{
  "target": "Arena Predictions",
  "action": "execute",
  "options": {
    "mode": "standard",
    "timeoutMs": 5000
  }
}
💡Parameters generated dynamically by Agent runtime
Agent Tool Output

Click 'Run Mock' above

to preview the raw response returned to the LLM

Env: AgentHub Virtual SandboxJSON-RPC 2.0

Decision Guide: Why & When to Use

Assess suitability before installing to save trial-and-error time

Best Suited For
  • When your AI Agent needs tool calling capabilities in this domain
  • Automating repetitive workflows in your IDE or terminal
  • Pairing with modern clients supporting MCP/Skill standards
When NOT to Use
  • When missing required API secrets or local runtime prerequisites
  • Pure conversational requests that don't need external system access
Recommended Workflow Pairing:

Arena Predictions + Scenario Prompt → Complete Agent Automation

MCP hands-on: install to visible results

Follow the full lab (expected UI/output + contrast checks). After installing this item, verify with the tutorial prompts.

Open tutorial →

Related resources

Often paired with

Keep exploring AgentHub

Most people compare similar tools or check scenario guides before installing—start here.

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Copy either snippet into your project homepage, docs, or GitHub README. The badge is a hotlinked SVG — nothing to host — and it links back to this page so visitors can find the install steps.

PreviewListed on AgentHub: Arena Predictions
HTML
<a href="https://myagenthub.cn/p/com.arena-predictions/arena" title="Listed on AgentHub: Arena Predictions" target="_blank" rel="noopener">
  <img src="https://myagenthub.cn/badge/com.arena-predictions/arena?lang=en" alt="Listed on AgentHub: Arena Predictions" height="20" style="border:0"/>
</a>
Markdown (GitHub README)
[![Listed on AgentHub: Arena Predictions](https://myagenthub.cn/badge/com.arena-predictions/arena?lang=en)](https://myagenthub.cn/p/com.arena-predictions/arena)

Badges are generated on the fly from /badge/<package-id>, so name and listing changes propagate automatically. Keep the link target unchanged — it is what counts as the referral.

Unified Manifest

{
  "id": "com.arena-predictions/arena",
  "type": "mcp-server",
  "version": "0.5.0",
  "displayName": "Arena Predictions",
  "description": "Paper trade prediction markets at live prices from your AI agent, and score every trade.",
  "homepage": "https://arena-predictions.com/docs/mcp",
  "distribution": {
    "packages": [
      {
        "registryType": "npm",
        "identifier": "arena-mcp-server",
        "version": "0.5.0",
        "runtimeHint": "npx",
        "transport": "stdio",
        "environmentVariables": [
          {
            "name": "ARENA_MCP_ALLOW_TRADE",
            "description": "Set to 1 to register the paper-trade tools (place_trade, sell_trade, get_orders, cancel_order, settle_open). Any other value leaves trading off."
          },
          {
            "name": "ARENA_ALLOW_RESET",
            "description": "Set to 1 to register reset_account, which resets the paper account to a new run at $100,000 after the person agrees. The server also refuses until the owner turns resets on in Settings on the web. Any other value leaves it out."
          },
          {
            "name": "ARENA_CREDENTIALS_FILE",
            "description": "Optional path to a credentials file for headless or CI use. By default the server reads the credentials that `arena login` stored."
          }
        ]
      }
    ],
    "remotes": []
  },
  "dependencies": [],
  "installTargets": [
    "claude-code",
    "claude-desktop",
    "cursor",
    "vscode",
    "trae",
    "cherry-studio",
    "lingma",
    "windsurf",
    "cline",
    "workbuddy"
  ],
  "keywords": [],
  "provenance": {
    "origin": "official-mcp-registry",
    "originalId": "com.arena-predictions/arena",
    "originalUrl": "https://registry.modelcontextprotocol.io/v0.1/servers/com.arena-predictions%2Farena/versions/latest",
    "isOfficial": true,
    "status": "active"
  }
}