StablecoinX

Name: StablecoinX MCP Server
Author: StablecoinX

stdio

Drive a StablecoinX business account — auth, API keys, sessions, paymaster, and webhooks.

Getting Started

npx @getmcp/cli add io.github.e2xlabs/stablecoinx-mcp

Requires Node.js 18+. Community-contributed server. Review source before installing.

Claude Desktopguide →Vscodeguide →Cursorguide →Windsurfguide →

Required Environment Variables

SCX_API_URL
API base URL.
SCX_CHAIN_ID
EVM chain ID for the smart account. The StablecoinX harness supports three testnets: 84532 (Base Sepolia, default), 421614 (Arbitrum Sepolia), 11155111 (Ethereum Sepolia).
THIRDWEB_CLIENT_ID
Public thirdweb client ID (publishable, not a secret). Must match the harness dashboard client ID.
THIRDWEB_ORIGIN
Origin header sent on outbound thirdweb calls; must be a domain allowed for THIRDWEB_CLIENT_ID.
SCX_STATE_PASSPHRASE
Passphrase used to encrypt the local state file (JWT / API key / session key) at rest. Pick any string.

Configuration

Config file: ~/Library/Application Support/Claude/claude_desktop_config.json

JSON

{
  "mcpServers": {
    "io.github.e2xlabs/stablecoinx-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@stablecoinx/mcp",
        "setup"
      ],
      "env": {
        "SCX_API_URL": "https://api.harness.stablecoinx.com",
        "SCX_CHAIN_ID": "84532",
        "THIRDWEB_CLIENT_ID": "830ece55cd210c34f351166a85edbd0f",
        "THIRDWEB_ORIGIN": "https://business.harness.stablecoinx.com",
        "SCX_STATE_PASSPHRASE": ""
      }
    }
  }
}

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