API Testing
Comprehensive REST and GraphQL API validation using Postman and Newman — schema validation, authentication flows, contract testing, and full CI/CD integration from day one.
Everything in one engagement
Every endpoint does what it claims. Correct responses for valid inputs, correct error codes for invalid inputs, business logic validated at the API layer.
OAuth flows, JWT validation, API key auth, role-based access control. Can a regular user access admin endpoints? Do tokens expire correctly?
API responses match the documented schema. Contract tests protect both API producers and consumers from breaking changes between services.
Response time benchmarks under normal load. Identification of slow endpoints before they become production problems.
Full coverage for both REST and GraphQL APIs — query validation, mutation testing, subscription testing, and introspection schema checks.
Newman runs your Postman collections in any CI pipeline. Automatic API regression on every deployment.
How we work together
Document every endpoint, authentication method, and expected behaviour. Identify the highest-risk flows — auth, payments, data writes.
Build comprehensive Postman collection organised by endpoint and test type. Environment files for dev, staging, and production.
Newman configuration for automated runs in your CI pipeline. Failure alerts and detailed reports on every execution.
Full collection documentation, contribution guide, and a walkthrough session so your team can extend the suite as the API grows.
The stack I use
API test suites typically find 3x more bugs than UI tests at 10x the speed.
Common questions
Both. Extensive experience with REST via Postman/Newman and GraphQL via specialised tooling and custom PyTest suites.
Yes — using Pact for consumer-driven contract testing in microservice architectures. Prevents breaking changes between services.
All auth methods — OAuth 2.0, JWT, API keys, Basic Auth, session tokens, SAML. Including token refresh flows and expiry testing.
We prioritise by risk. Critical endpoints get comprehensive coverage. Read endpoints get happy path plus key edge cases.
What clients say
"Exceptional work — thorough, timely, and clearly communicated at every stage. Our release confidence improved dramatically."
"Reliable and detail-oriented. The framework saves our team hours every sprint. Brilliant at catching edge cases nobody else found."
"Brought real structure and professionalism to our QA process. Proactive, technically strong, and genuinely invested in our product."
Tell me about your project. I will respond within 24 hours with a clear plan and transparent pricing — no commitment required.
Free 30-min discovery call · No commitment · Custom quote within 24 hours