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NexSMS

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NexSMS is a sending-only OTP SMS API for teams outside China whose users are in China mainland. Call one endpoint with three parameters (phone, template, variables) and we deliver verification codes through multiple China mainland channels with automatic failover. No sender-ID or template registration on your side. Flat USD 0.05 per message, no monthly fee, 20 free test messages after email verification. Per-customer rate limits and IP allowlists help protect against SMS pumping. Documentation and support in English, Traditional Chinese and Simplified Chinese. NexSMS only sends to China mainland numbers; it does not provide phone numbers for receiving codes.

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