Documentation

DEVELOPER GUIDES HELP CENTRE FORMS & ADMINISTRATION

Developer Guides

Use the REST API directly or get started faster with a library for your preferred language and runtime.

REST API

Build messaging workflows for SMS, email, fax, voice and text-to-speech using TNZ’s JSON-over-HTTPS API. Authenticate with a JWT bearer access token and receive delivery updates through webhooks.

VIEW API REFERENCE →
  • OpenAPI 3.1 specification
  • Postman collection
  • JWT bearer authentication
  • Delivery-status webhooks

Use an API library

Use a supported package with language-specific examples and installation guidance.

More ways to connect

Connect modern applications, desktop tools and established business systems.

Start building

Generate your access token, test your integration, then configure delivery updates and error handling.

Help Centre

Find answers to common questions:

Search setup guides, account instructions and practical answers for using TNZ services.

Recent Articles

Standard vs Verified WhatsApp Business Accounts

Configuring a Verified WhatsApp Business account so that your business name appears first on messages.

READ ARTICLE

Unsubscribe Option for SMS Messages

Use automation to update Opt Out request, adding these to your TNZ opt-out list. This guide explains the keywords used, how to track opt-outs, and how users can resubscribe.

READ ARTICLE

Platform Throughput and Message Processing Speed

Learn TNZs message throughput limits for SMS, Email, Voice and Fax with per-hour figures, broadcast planning examples, and answers to common capacity questions.

READ ARTICLE
BROWSE ALL HELP ARTICLES →

Forms and Administration

Forms for adjusting credit limits, ordering numbers, requesting direct debits, etc.

Start your free trial today!

Ready to revolutionise your messaging?
Connect with people anywhere - boost engagement, responses and conversations.

20 credits over 14-days. No obligation. No credit card required.