Robust API testing for seamless integration and confident, continuous delivery

Accelerate delivery, reduce risk, and monitor APIs across complex environments.

Assurity’s API testing services help reduce delivery risk, accelerate time to market, and ensure system reliability. With a focus on automation, reusability, and continuous monitoring, our solutions support confident decision-making and seamless integration across your digital ecosystem.

Key benefits

Identify integration issues early to reduce delivery risk

Detect failures early across services and dependencies – reducing rework, outages, and delivery risk.

Accelerate releases with automation in CI/CD

Run fast, reliable API tests in every pipeline to shorten feedback loops and speed up delivery.

Maximise value with reusable test assets

Build once, use everywhere – across regression, monitoring, and integration testing phases.

Core capabilities

End-to-end system integration testing

Validating APIs alongside services, file transfers, and reports across complex digital ecosystems.

Contract testing implementation

Ensuring reliable system interactions by verifying API contracts at digital integration points.

Automated API testing frameworks

Building robust, reusable test suites using tools like REST Assured and integrated CI/CD pipelines.

Behaviour Driven Development (BDD)

Creating business-readable API tests that double as living documentation for shared understanding.

Reusable and portable test assets

Designing automation assets for reuse across integration, regression, and production monitoring.

Multi-environment and cloud testing

Delivering API testing across diverse platforms, vendors, and cloud-based environments with flexibility.

Engagement models

Flexible engagement models aligned to strategic goals, delivery timelines, and resource needs.

On-demand talent

Access enterprise-grade testing capabilities when and where needed. Through the Assurity Cloud, we provide scalable services like AutomationFlex and PerformanceFlex to meet evolving delivery demands.

Project-based delivery

Structured, outcome-focused testing aligned to your project’s scope, timeline, and risk profile. Assurity delivers across all test phases to ensure quality from design to go-live.

Managed services

A long-term quality assurance partnership. Assurity takes full responsibility for continuous testing, automation maintenance, and production monitoring, freeing your teams to focus on innovation.

Case studies

Inland Revenue

Assuring Inland Revenue’s shift to Oracle goes smoothly with QA & testing

  • Provided testing and assurance for 26 integrations with other systems within and external to IR.
  • Reduced maintenance costs while accelerating time to market for the Oracle Cloud.
  • Automated Regression tests now take just 6 hours; an equivalent manual test would take 15 person-days.
Read Case Study

Why partner with Assurity?

Proven expertise and trusted delivery

With 20+ years of experience and 2,000+ engagements, Assurity is a trusted partner to over 350 New Zealand organisations, including major government agencies and enterprises.

Innovative, end-to-end quality approach

Assurity integrates Quality Engineering across the lifecycle, using lean, risk-based methods and platforms like Assurity Cloud and Assurity Intelligence to deliver smarter, faster testing.

Skilled, cross-functional teams

Assurity’s 150+ consultants bring deep expertise across testing, DevOps, Agile, and business analysis—tailoring solutions to fit any delivery model or technology stack.

Long-term, outcome-focused partnerships

Assurity goes beyond resourcing to deliver managed outcomes, with strong governance, dedicated Delivery Managers, and accelerators that build lasting test capability.

What clients say

“There’s a very narrow window for testing quarterly patches, so it’s an intense process. Assurity’s work streamlines this crucial task; without the support of automated testing, it’s hard to see how managing these updates would be feasible.”

Lara Ariell

CFO, Inland Revenue

“Automated testing and reusable test assets go beyond the value delivered to IR. It means each agency can access proven artifacts along with the reference architecture for systems implementation. And that means taxpayers get more value for their money as government agencies transform for the future.”

Lara Ariell

CFO, Inland Revenue

FAQs

Assurity integrates API testing early in the lifecycle, using automation and contract testing to detect issues at system boundaries – reducing integration risk and accelerating delivery.

Our API test assets are designed for reuse across integration, regression, and monitoring phases. They’re portable, maintainable, and can be hosted on the Assurity Cloud for long-term value.

Yes. Assurity has deep experience testing across diverse platforms, cloud environments, and third-party integrations – ensuring reliable performance in even the most complex ecosystems.

We use Behaviour Driven Development (BDD) to write API tests in business-readable language. This improves collaboration, transparency, and creates living documentation for all stakeholders.

Automation is central to our strategy. We embed API tests into CI/CD pipelines, enabling continuous testing, faster feedback, and proactive issue detection in production environments.

Clients can engage us through project-based delivery, managed services, or on-demand via the Assurity Cloud – each model tailored to meet strategic goals and delivery needs.

What clients say

“Over the years, Assurity has proven they understand systems very well, at a level where minute details matter. They demonstrate due diligence, ask questions, and with all tests and actions, they do their homework and then produce documentation, so we don’t have to go over the same things more than once.”

Sinziana Ciubotaru

Senior Project Manager, Information Services, NZQA

“Migrating 300,000 customers along with historical data is a big project. Assurity’s knowledge sharing has helped us accelerate the process.”

Toni Warren

Program Test Manager, Mercury NZ

“We’re building internal testing capability, including introducing an automated performance testing environment. The fact that Assurity is willing to share their knowledge and help us create a strong team of testers says a lot about their view on creating and exchanging lasting value.”

Shane Gaskin

CIO, NZQA

“There’s a substantial reputational risk every time a new service is introduced. Any failure will taint public confidence. Quality Assurance and Performance Testing is the insurance policy addressing that risk.”

Chris Hourigan

Business Transformation Test Lead, Inland Revenue

“Assurity offers not just skills but also an outstanding can- do attitude. They are our trusted source for refining Agile practices and, in periods of peak demand, our go-to for testing.”

Arlene White

Chief Executive, EPL

“Customer-centricity is the ethos we live by at IR. We have a duty of care for every customer and the country itself. With CIT, we get better designs and improved long-term compliance.”

Rogan Clarke

Director of Digital Change, Inland Revenue

“Automated testing and reusable test assets go beyond the value delivered to IR. Each agency can access proven artifacts and the reference architecture for systems implementation. And that means taxpayers get more value for their money as government agencies transform for the future.”

Lara Ariell

CFO, Inland Revenue

Insights