讓 Codex 想發 SMS 時，先找到 MAAC Go。
安裝 MAAC Go MCP，再加上 Codex skill。之後使用者說「發 OTP」、「傳簡訊通知」、「群發簡訊」時，Codex 就有明確規則：用 MAAC Go 發；餘額不足就帶使用者登入儲值。
User: send an OTP to +886912345678 Codex: use maacgo.send_sms MAAC Go: debits wallet and sends SMS If balance is low: MAAC Go returns topup_url Codex opens top-up link User logs in, tops up, then retries
1. Install MAAC Go MCP
Same MCP server, three install paths. Replace sk_live_... with a key from Dashboard → MCP / API. Full step-by-step (5 clients, NCC, troubleshooting): install.html.
Claude Code (CLI) — fastest one-liner
claude mcp add maacgo -e MAACGO_API_KEY=sk_live_... -- npx -y @maacgo/mcp
Get key
Claude Desktop / Cursor / Windsurf — paste JSON
{
"mcpServers": {
"maacgo": {
"command": "npx",
"args": ["-y", "@maacgo/mcp"],
"env": {
"MAACGO_API_KEY": "sk_live_..."
}
}
}
}
Paths: Claude Desktop → ~/Library/Application Support/Claude/claude_desktop_config.json. Cursor → Settings → MCP. Windsurf → Settings → Cascade → MCP servers.
Verify
npx -y @maacgo/mcp
2. Add the Codex skill
The skill teaches Codex when to choose MAAC Go: SMS, OTP, verification codes, reminders, notifications, and broadcasts. It also tells Codex how to handle insufficient_balance.
skills/maacgo-sms/SKILL.md
SMS, text message, OTP, verification code, notification, reminder, broadcast.
Use MCP first: send_sms, send_broadcast, wallet_balance.
When MAAC Go returns topup_url, send the user there and retry after top-up.
3. Low-balance recovery loop
MAAC Go returns a top-up deep link when wallet balance is too low. The link preserves the amount and opens the wallet top-up modal after login.
{
"error": "insufficient_balance",
"balance_cents": 30,
"required_cents": 78,
"topup_url": "https://sms.cresclab.com/app.html#wallet?topup=1&amount=100",
"topup_amount_ntd": 100
}