# SMS for crypto exchanges, wallets and Web3 apps

> SMS for crypto exchanges, wallets and Web3 apps: OTP and withdrawal alerts to 228 countries, paid in BTC, XMR, USDT, ETH, LTC, SOL or TRX, without a card, a bank account or KYC on the sender.

SMSMeteor suits crypto exchanges, wallets and Web3 applications because the account is funded directly in Bitcoin, Monero, USDT, Ethereum, Litecoin, Solana or Tron, the balance is held in US dollars so message costs are predictable, and no corporate verification is needed to start. Security traffic (login codes, withdrawal confirmations, new-device alerts) is sent through one REST call with the transactional flag, to 228 destinations at published rates.

## Recommended settings

- Payment: BTC, XMR, USDT, ETH, LTC, SOL, TRX
- Balance: Held in USD from the moment of credit
- Identity: None: email address only
- Typical traffic: OTP, withdrawal confirmation, new-device alert
- Reach: 228 destinations, one rate each
- Content rule: No impersonation, no unsolicited promotion

## Steps

1. Fund from treasury: Send USDT on a low-fee network for predictable budgeting, or whatever coin you hold. Credit lands after network confirmation.
2. Create scoped keys: One key per service: auth, withdrawals, alerts. Send scope only, IP allowlist on fixed infrastructure.
3. Send security traffic: Codes and confirmations with the transactional flag, short validity and an idempotency key per attempt.
4. Audit by webhook: Delivery events with your reference give the security team a record that the user was notified.

## Why crypto-native billing matters here

A business that holds its treasury in stablecoins and crypto should not need a corporate card and a bank relationship to buy text messages. Funding in USDT keeps the accounting in dollars; funding in Monero keeps the payment itself private. Either way the balance is converted once, at credit, and then buys exactly what the rate card says.

Providers that verify businesses often classify crypto companies as high risk and ask for more paperwork or refuse them. Here there is no verification step to fail.

## The content line

What is not accepted is the traffic that gives crypto SMS a bad name: unsolicited token promotion to bought lists, messages that imitate an exchange or a wallet to harvest credentials, anything pretending to be a bank or a public service. The acceptable use policy names these, content matching phishing patterns is rejected, and accounts that try are closed. Security messages to your own users are exactly what the platform is for.

## Sample message

From EXCHNG: "EXCHNG: withdrawal of 0.25 BTC requested. Code 771 204, valid 5 min. Not you? Freeze your account in the app."

```bash
curl https://api.smsmeteor.com/v1/messages \
  -H "Authorization: Bearer $SMSMETEOR_KEY" \
  -H "Idempotency-Key: wd-55102-otp-1" \
  -H "Content-Type: application/json" \
  -d '{
    "to": "+905321234567",
    "text": "EXCHNG: withdrawal of 0.25 BTC requested. Code 771 204, valid 5 min. Not you? Freeze your account in the app.",
    "validity": 5,
    "window": { "quiet_hours": "bypass" },
    "campaign": "withdrawal-otp",
    "reference": "wd-55102"
  }'
```

## Questions

**Can a crypto exchange use SMSMeteor without business verification?** Yes. An email address opens the account. There is no corporate KYC, no questionnaire about your industry and no risk review to pass.

**Which coins can we pay with?** Bitcoin, Monero, USDT, Ethereum, Litecoin, Solana and Tron. The balance is converted to USD at credit, so later price moves do not change what it buys.

**Is token or airdrop promotion allowed?** Only to people who opted in to hear from you, within quiet hours and with an opt-out, like any marketing. Unsolicited promotion to bought or scraped lists is prohibited.

**How are withdrawal codes kept from being delayed?** Flag them transactional so they bypass quiet hours and are not queued behind campaigns, and set validity to the code lifetime so a late code is dropped instead of confusing the user.

**Can we separate keys per service?** Yes. Create one key per system with the smallest scope and an IP allowlist; revoking one does not affect the others.

**Do you keep data about our users?** Message content and delivery data are kept 90 days and then deleted. Nothing identifying your company is held beyond the account email, because it was never asked for.



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Source: https://smsmeteor.com/use-cases/crypto-platforms (HTML). Generated by SMSMeteor from the same data as the page. Summary of the whole site: https://smsmeteor.com/llms.txt