Deliver verification codes
Send your application's one-time codes by SMS, with voice delivery when needed. Your application controls the verification process.
Explore code delivery →Add verification codes and customer messaging through the TNZ API. Use SubAccounts to separate customer activity and costs, with NZ support when you need help integrating.
Start with SMS. Add email, WhatsApp and voice through the same account as your product grows.
Call the REST API directly or use a library for your language. The work depends on how your application triggers messages and handles the results.
Use REST, .NET, Python or Node.js/TypeScript. For software that already sends email, consider Email-to-SMS.
Supply the destination and message, then configure delivery results and incoming replies. Decide how your application will handle each event.
Check message delivery, replies and failure handling with your team. The SMS API also has a Test mode for processing requests without a live send.
Choose a use case for API details, channel options and integration guides.
Send your application's one-time codes by SMS, with voice delivery when needed. Your application controls the verification process.
Explore code delivery →Trigger customer notifications from your application and bring replies into your own interface through webhooks.
Explore the SMS API →Send receipts, account updates and other emails generated by your software. Connect through the API or an email gateway.
Explore transactional email →Configure the API to retry a failed SMS as an automated call, or let your application decide when a call is needed.
Explore automated voice →Send approved WhatsApp templates and receive customer replies through the API. Configure SMS fallback if WhatsApp delivery fails.
Explore WhatsApp →Connect alerts from your monitoring software by API or Email-to-SMS. Your monitoring system decides who needs the notification.
Explore SMS alerts →No matching use cases. Try another term or reset the filters. You can also browse all integrations.
Use SubAccounts to organise activity by customer. For SaaS providers and agencies, this gives you a way to allocate usage and prepare customer charges.
Delivery webhooks include the message price. Your billing workflow can use that data alongside monthly reports to reconcile costs.
See the account and billing structure →Start with one message workflow. Map your current authentication, request fields and delivery callbacks to TNZ, then test the sending number and replies.
Compare local short-code access, NZD pricing and reporting alongside the API work. TNZ provides fast delivery and an NZ support team for integration questions.
James Dunlop Textiles needed better customer emails from its existing ERP. TNZ built a file processor to convert the ERP output into branded emails and deliver them through its cloud email service.
The published story reports that emails going to spam fell from approximately 10% to under 1% for this project.
Read the James Dunlop integration story →Use the SDK links above for application code. For automation and monitoring, start with a supported integration.
Browse 45+ integrations →When you send SMS in New Zealand, your messages come from a TNZ Short Code, a 4-digit number like 3003. One is assigned to you automatically based on your message type. It's instant and included in your plan.
Most businesses start here. Built-in Short Codes work well for appointment reminders, alerts, and general business messaging, with no setup required.
If you're running keyword campaigns (e.g. "Text INFO to 3003"), want full inbound SMS from any NZ mobile, or are building long-term brand recognition, a Dedicated Short Code gives you exclusive ownership of your number.
Start with a built-in Short Code and upgrade if you need more. Talk to our team, we'll give you an honest recommendation.
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