Phoenix Zero MCP Server: Install & Setup

Install Phoenix Zero in Claude Code

Claude Code

claude mcp add phoenix-zero-execution-oracle-for-l2s -- npx -y phoenix-mcp-server

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "phoenix-zero-execution-oracle-for-l2s": {
      "command": "npx",
      "args": [
        "-y",
        "phoenix-mcp-server"
      ]
    }
  }
}

Frequently asked questions

What does the Phoenix Zero MCP server do?

Pre-transaction PASS/FAIL for an L2. Free verdict delayed ~60 s, no revert ratio; live via x402.

Is the Phoenix Zero MCP server free?

Probably not entirely. The listing mentions pay-per-call, credits or a subscription. Check the provider for current pricing.

Does Phoenix Zero run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add Phoenix Zero to Claude Code?

Run: claude mcp add phoenix-zero-execution-oracle-for-l2s -- npx -y phoenix-mcp-server

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