Mercury X402 MCP Server: Install & Setup

Install Mercury X402 in Claude Code

Claude Code

claude mcp add --transport http mercury-x402 https://network.mercury-hq.com/mcp

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

{
  "mcpServers": {
    "mercury-x402": {
      "url": "https://network.mercury-hq.com/mcp"
    }
  }
}

Claude Code

claude mcp add mercury-x402 -- npx -y mercury-x402-mcp

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

{
  "mcpServers": {
    "mercury-x402": {
      "command": "npx",
      "args": [
        "-y",
        "mercury-x402-mcp"
      ]
    }
  }
}

Agent-payable web data over x402: 18 keyless services an agent pays per call.

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

Local + Remote. Can run locally or be used as a hosted remote server.

Run: claude mcp add --transport http mercury-x402 https://network.mercury-hq.com/mcp

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