Endpoint validation
We check that each endpoint conforms to business rules. Response codes, data structures and mandatory fields are validated.
Managed Services
Web Service and API Testing Services
We validate the integration layer without depending on the interface.
Schedule a meetingWeb Service and API Testing Services
Web service and API testing validates functionality at the service layer independently of the interface. We check that endpoints conform to business rules, response structure and error handling, and we test the integration chain end to end.
What this service solves
Enterprise applications depend on many internal and external services. A change to one integration contract can disable a flow that looks unrelated. Testing through the interface surfaces those defects late and only indirectly.
Validation at the service layer catches the defect at source and runs markedly faster than interface testing. That is why we position API testing as the foundation layer of coverage.
Our scope
Contract testing
We detect changes to the service contract. The impact on the consumer side is reported before the change goes live.
Integration chain testing
We validate flows spanning several services end to end and identify where the chain breaks.
Error and boundary scenarios
We test invalid data, timeout and unauthorised access scenarios, and confirm that error handling is predictable.
Authorisation and security checks
We test authentication and authorisation boundaries and check for unauthorised access paths.
How do we work?
We plan around your release rhythm, manage the operation and improve it in every cycle.
Planning
We define scope, test levels and success criteria against your release calendar. Environment and test data requirements are resolved before the work begins.
Management
We take on team, tool and environment management. Progress is reported regularly against defined KPIs.
Execution
We run the tests and prioritise the findings. We track closure together with your development teams.
Improvement
At the end of every cycle we review scope, automation rate and escaped defect rate. The priorities for the next cycle are set from that review.
Virgosol
How technology supports the service
We run API validation through RabbitQA's SmartAPI module, so service tests are tracked in the same structure as the requirement and scenario layers. For organisations preferring standalone execution, AutoRunner runs API tests as one layer of the automation suite.
What you receive
Deliverables
- An endpoint-level test case library
- Contract change detection reports
- Integration chain execution results
- Error and boundary scenario findings
- Automated API execution connected to the deployment pipeline
What changes for the business
- Integration defects are caught before interface testing
- The impact of a service change is visible before it goes live
- Execution time falls compared with an interface-heavy structure
- Risk in third-party integrations becomes trackable
Frequently Asked Questions
Does API testing replace interface testing?
It does not, but it takes over a significant share of coverage. Moving business rule validation to the service layer reduces the number of interface tests and shortens execution time. Interface tests remain necessary to validate the integrity of the user journey.
How do you test third-party services?
We replace external services with virtual equivalents in the test environment, which makes tests repeatable and independent of the external system's availability. We also validate against the real service at defined intervals.
When is contract testing needed?
It becomes necessary as service count rises and teams begin releasing independently. Contract testing shows early where one team's change will affect another.
Our API documentation is incomplete. Can tests still be written?
Yes. We examine the existing endpoints and derive the actual behaviour. Documentation gaps found during that work are identified and reported.
Let us assess your integration coverage together
Complete the form and we will discuss your service architecture, your external integration count and your current API test coverage.