Pay as you go, no commitment
One simple price. Prepaid USD balance, topped up with USDT-TRC20. You only pay for the verification codes you actually receive.
- Charged only for successful OTPs (hold → capture)
- Full refund when no code arrives — just call /cancel within the refund window
- Unlimited API keys
- Real-time balance and usage tracking
- No monthly fees or commitments
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Top-up packages
Minimum top-up $10. 100% of the received USDT is added to your balance — no cut on our side.
Frequently asked questions
What am I paying for?
Just $0.003 for each successful OTP you receive. The amount is reserved (held) on the /get_mail call and captured once the code is returned to you. If no code arrives and the reservation expires, the hold is still charged — call /cancel within the refund window to get your money back. It is not refunded automatically.
How do I add funds?
With USDT-TRC20. Pick an amount in the dashboard and you get a dedicated deposit address and QR code. 1 USDT = 1 USD, the minimum top-up is $10, and the full received amount is added to your balance.
Can I send outbound email?
No. OneForMail is an inbound-OTP service only; it never sends email. It issues a disposable email address and reads the incoming verification code.
Can I open an account myself?
Yes. Create an account and confirm your email to get started. You then generate an API key and top up your balance from the dashboard.