Documentation | Developers

Developer documentation

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 → ASK AI
  • 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 documentation

Find an answer in the Help Centre

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

Recent Help article

Unsubscribe Option for SMS Messages

Adding and managing opt-out/unsubscribe requests

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Recent Help 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.

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Recent Help article

Configuring Webhooks and API Notifications

Learn how to configure TNZ API webhooks for real-time delivery reports and inbound SMS. Automate your workflow with Zapier, Make, and custom integrations.

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Account administration

Forms and authorities

Download the form you need as a PDF or Word document, ready to complete and return to TNZ.

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