Home • Services • API & Integration Testing

API & Integration Testing

Know it broke before your customer files a ticket.

We test APIs and integrations for contract accuracy, edge cases and failure handling — so a third-party change, a bad response, or a silent timeout gets caught by a test, not a support ticket. Senior QA engineers, fixed scope, integrations your team can trust are actually working.

180+ teams shipping with our engineers · ISO 27001-secure · NDA on request

— What we build

Four ways we test your APIs and integrations.

From a first contract test suite to full multi-system integration testing, we test the behavior that actually breaks in production — edge cases and failures, not just the happy path. (Need the API built, or load-tested under traffic instead? See our API Development & Integration and Performance & Load Testing pages.)

API contract testing

Verify that an API’s actual responses match its documented schema — so a silent breaking change gets caught immediately.

Schema validation

Contract testing

Breaking-change detection

Third-party & webhook testing

Test integrations with external APIs and webhook consumers, including how your system handles their failures and changes.

Third-party API testing

Webhook testing

Failure simulation

Error handling & edge-case testing

Deliberately test timeouts, malformed responses, rate limits and network failures — not just the successful request.

Timeout testing

Malformed data

Rate-limit handling

Multi-system integration testing

Test end-to-end flows across several connected systems, so a failure in one doesn’t silently corrupt data in another.

End-to-end flows

Cross-system validation

Data consistency checks

Most integration bugs aren't in the happy path
they're in what happens when something goes wrong.

Most “the integration silently broke” incidents happen because testing only ever checked the successful case — nobody simulated what happens when the third-party API times out, returns malformed data, or changes its response format without warning. Before we call anything tested, we deliberately test the failure modes — because that’s where integrations actually break in production.

Failure modes tested

Contract-verified

Breaking changes caught

Runs on every deploy

MAP

Identify every integration point & its contract

TEST

Verify happy path, edge cases & error handling

AUTOMATE

Wire tests into CI/CD to run on every deploy

Outcome

We start with an integration map — so tests cover every point where your system depends on another one, not just the ones that are easy to test.

14 YEARS · 300+ PRODUCTS

Built to catch the silent break,
not just the loud one.

19+

Chatbots shipped

across 9 industries

14yrs

Years in business

founded 2012

95%

Engagement extension

clients renew or expand

<2wk

Kickoff time

brief → first standup

Capabilities & stack

Boring tech that
ships on time.

We test with proven, widely-adopted API testing tools — not a custom Postman collection only one person maintains. Real coverage, integrated into your release process.

How we pick

Map every integration point first

Before we write tests, we inventory every place your system depends on another API or service — many integration points are undocumented until someone maps them.

Test the failure, not just the success

A test suite that only checks the happy path misses where integrations actually break — we deliberately test timeouts, malformed responses and rate limits.

Validate the contract, not just the connection

A successful HTTP response doesn’t mean the data is correct — we validate response schemas against the documented contract, catching silent breaking changes.

Wire tests into every deploy

Integration tests run automatically in CI/CD, so a breaking change gets caught before it reaches production, not discovered by a customer.

API TESTING TOOLS

Postman / Newman

REST-assured

Karate

Insomnia

CONTRACT TESTING

Pact

JSON Schema validation

OpenAPI contract checks

MOCKING & SIMULATION

WireMock

MockServer

Third-party failure simulation

CI/CD INTEGRATION

GitHub Actions

GitLab CI

Automated regression suites

MONITORING & ALERTING

Datadog

Synthetic monitoring

Third-party API change detection

Industries

Integration testing,
tuned for your industry.

Every industry depends on different third-party systems, with different consequences when an integration silently fails. We bring playbooks, not generic test collections — and target testing at your organization’s real integration risks from day one.

01 · Industry

Healthcare

Testing for integrations that carry patient data.

0 · Industry

Finance & Fintech

Testing for integrations where a silent failure costs money.

03 · Industry

Retail & E-commerce

Testing for integrations that touch checkout and inventory.

04 · Industry

Logistics

Testing for integrations where a bad sync means a missed shipment.

Engagement models

Pick how you want to
ship with us.

Three ways in — all senior QA engineers, all fixed against the reliability outcome we agree on before the first test is written.

Fixed-scope

Integration testing audit

Best when you’re not sure how much of your integration surface is actually tested.

Project-based build

Best for a defined set of APIs or integrations needing real coverage.

Embedded

Staff augmentation

Plug senior API testing engineers into your team.

FAQ

The questions
everyone asks before kickoff.

Not sure how much of your integration surface is actually tested? Book a 30-min call with a senior QA engineer.

What's the difference between API testing and integration testing?

API testing verifies an individual endpoint behaves correctly in isolation. Integration testing verifies that multiple connected systems work correctly together, including how failures in one propagate to another. We build both, since real production bugs often live in the gap between them.

A third-party API we depend on changed without telling us — could testing have caught that?

Yes — contract testing specifically checks that responses match the documented schema, so a silent breaking change from a third party gets flagged by a failing test instead of a confused support ticket.

Do you only test the "happy path," or do you test what happens when things go wrong?

We specifically prioritize testing failure modes — timeouts, malformed responses, rate limits, network errors — because that’s where most integration bugs actually happen, not in the successful case everyone already tests.

Can you test webhooks, or only request/response APIs?

Yes — webhook testing verifies your system correctly handles incoming events, including out-of-order delivery, retries, and malformed payloads from the sending system.

We have many microservices talking to each other — can you test all of it?

Yes — we test both individual service contracts and end-to-end flows across multiple services, checking that data stays consistent as it moves between them, not just that each service works in isolation.

Will these tests run automatically, or do we need to run them manually each time?

We wire integration tests into your CI/CD pipeline so they run automatically on every deploy — catching a breaking change before it reaches production, not after a customer reports it.

Can you test integrations with specific third-party services we already use?

Yes — we test whatever your system actually depends on, whether that’s a payment processor, a shipping carrier, a CRM, or an internal service, and simulate their failure modes specifically.

Who owns the test suite after handover, and can our team maintain it?

You own it, fully — test code, CI configuration, and documentation, with no vendor lock-in. We hand over everything your team needs to maintain and extend it as your integrations grow.

ISO 27001-secure · Certified since 2012

Let's find out what's actually untested.

Send your brief — a senior QA engineer (not a sales rep) replies within 24 hours with a read on your integration coverage gaps, and a fixed-scope plan for the test suite.

What you’ll get