Software Testing & Quality Assurance
API Testing & Validation
Thorough testing of your REST, GraphQL or SOAP APIs for correct responses, schema compliance, error handling, authorisation and performance, independent of any user interface.
Overview
Why it matters
for your business.
APIs power your web app, mobile app and partner integrations, so a fault in one endpoint can break all three. Testing at API level is faster and more stable than through the UI. We review your OpenAPI or GraphQL specifications, then test each endpoint for correct status codes, response schemas, validations and business logic.
Beyond happy paths, we test malformed payloads, missing fields, pagination limits and authorisation, confirming a user cannot read another customer’s records by changing an ID. Tests are automated into collections or code that run in your pipeline, and we highlight gaps between documentation and actual behaviour so specs stay accurate for consumers.
What's included
- API test plan based on specifications
- Automated API test collections or code
- Schema and contract validation checks
- Negative and authorisation test scenarios
- Basic response time measurements per endpoint
- Specification discrepancy report
Outcomes
What changes
for your business.
Ideal for
- API-first SaaS and fintech products
- Mobile apps backed by REST services
- Businesses exposing APIs to partners
Reliable endpoints
Consistent responses and error handling make life easier for every app and partner that consumes your APIs.
Access flaws caught
Authorisation checks reduce the chance of users reaching data that belongs to someone else.
Accurate documentation
Specs that match behaviour help partner developers integrate faster with fewer support questions.
How we deliver
A clear, accountable
process.
Every engagement follows the same disciplined approach, adapted to the size and urgency of your project.
- 01
Assess
We understand your data sources, applications or risks and agree priorities and scope.
- 02
Plan
A clear approach covering tools, coverage, controls and responsibilities is agreed with you.
- 03
Implement
We build the pipelines, dashboards, test suites or security controls and verify they work.
- 04
Report & improve
Findings, metrics and recommendations are shared regularly so quality keeps improving.
Ways to work with us
- Fixed-price projectsDefined scope, milestones and deliverables.
- Dedicated teamsAssigned engineers, testers or marketers for ongoing work.
- Time & materialFlexible delivery based on actual effort and resources.
- Monthly managed servicesRecurring application, IT, marketing or infrastructure support.
FAQ
Common
questions.
Something else on your mind? Ask us directly.
We have no API documentation. Can you still test?
Yes. We can capture traffic from your web or mobile app, review the code with your developers and build an initial OpenAPI specification as we go. That document becomes a useful asset for your team and future integrations.
Does API testing include security testing?
It includes functional security checks such as authentication and authorisation behaviour. Deeper security testing, like injection, rate limiting abuse and OWASP API Top 10 analysis, is covered by our application security testing and API security services.
Let's talk about API Testing & Validation.
Tell us what you need and get a clear plan and proposal, free and with no obligation.