Contract & schema testing
Versioned contract validation so breaking changes are caught in CI, not in a partner's incident channel.
Quality Engineering
Your APIs are your product. Test them like it.
UI tests exercise one happy path through an API that dozens of consumers hit in ways your UI never will. Contract drift, silent breaking changes, and unhandled error paths ship quietly — until an integration partner's production breaks on your release day.
Independent quality engineering & cybersecurity since 2020 — 100+ security & quality engineers, delivering on platforms we build and run ourselves.
API defects are multiplied defects: one broken endpoint fails every consumer at once, and the consumer's users blame the consumer. Integration partners remember whose release broke them.
What we do
Functional & negative testing
Beyond 200-OK: auth failures, malformed payloads, pagination edges, idempotency, and error-body correctness across REST, GraphQL, and event-driven services.
Integration-flow testing
Multi-service scenarios that mirror real consumer behavior — sequences, retries, and partial-failure handling, not isolated endpoint pokes.
Performance baselines
Latency and throughput baselines per endpoint, so regressions surface as numbers in a build, not complaints in production.
How it’s delivered
01
Inventory
Map the API surface, consumers, and contracts — including the undocumented endpoints.
02
Design
Coverage plan by endpoint criticality; agree what CI gates on.
03
Automate
Suites built in your stack, running against every build.
04
Baseline
Performance and contract baselines tracked release over release.
Tools & standards
- Frameworks our engineers work in
- Postman/Newman, REST Assured, Playwright API, k6
- Contract & schema
- OpenAPI/Swagger validation, GraphQL schema checks
What you receive
- An automated API regression suite in your CI
- Contract validation gates that catch breaking changes pre-release
- Endpoint-level coverage and latency baselines
- Defect reports with request/response evidence and repro scripts
Engagement
Ways to engage the same senior bench
Buy it as a scoped project, embed it in your team, or run it as a managed service — same engineers, same governance, whichever shape fits.
Scoped project
A defined piece of work with a fixed outcome — a test suite built, a release hardened, a backlog cleared — delivered by our team and handed over with documentation.
Embedded QE
Our engineers work inside your sprint teams, on your tools and cadence, owning quality alongside your developers rather than testing from the outside.
Managed QE service
We own the discipline as an ongoing service — coverage, execution, and reporting — scaling the bench up or down as your release pressure moves.
Who this is for
- Platform teams whose APIs have more consumers than their test suite has cases
- Product companies whose partners integrate against versioned public APIs
- Teams adopting microservices and discovering integration defects the hard way
Common questions
How does this relate to API security testing?
This is functional and contract testing — does the API behave correctly for its consumers. API security testing is the adversarial counterpart. Many clients run both; they share the endpoint inventory.
Do you test event-driven and GraphQL APIs, or just REST?
All three. Contract, integration, and negative testing across REST, GraphQL, and event-driven or message-based services — the schemas and failure modes differ, so the test design does too.
Can this run in our CI pipeline?
Yes — API suites are built to run on every merge, so a breaking contract change is caught by the pipeline before a downstream consumer finds it in production. VirtueATLAS accelerates authoring where it helps, but the suite runs in your CI on your terms.
Who actually does the work?
Senior engineers from our own bench — 63% hold industry certifications (CISSP, CEH, eCPPT, ISTQB, AWS). The people who scope your engagement are the people who run it; there is no rotating offshore bench behind the proposal.
One practice, not one vendor
This is one stage of a single assurance loop: findings become regression tests, and their indicators become live detections — so a problem, once fixed, can’t quietly come back. That’s what you get from one integrated partner that a stack of separate vendors can’t. See how the loop connects →
Where is your quality engineering today?
Walk through your suite, coverage, and release cadence with a QE lead.