API testing services
Thorough testing for the APIs your product depends on.
Functional, negative, and error-handling tests for your APIs, from authentication to edge cases, delivered as a reusable suite and a findings report.
Beyond the happy path
Invalid input, missing auth, timeouts, and partial failures, not only success cases.
Reusable suite
The tests we write stay with you, in Testnir or your own tooling.
Clear findings
Each issue comes with the request, the response, and why it matters.
What you receive
- A test plan covering the endpoints in scope
- A reusable request collection or test suite
- A findings report with reproducible requests
What we need from you
- API documentation or a specification, if available
- A test environment and credentials for it
How it works
A clear process from first call to final report.
Submitting an inquiry is not a contract. No work starts until the scope is agreed in writing.
Discover
We learn your product, users, risks, and release plans.
Agree scope
We agree what is tested, how, and what you receive.
Test and review
Testers do the work and review findings before reporting.
Report findings
You get prioritized, reproducible findings with evidence.
Improve
We help you act on the results and plan the next round.
See whether Testnir fits your team.
Book a demo of the platform, discuss a testing project, or both. We will reply by email to plan the conversation.