AishiSec Services
API Security Testing
Could your API expose data or actions that should stay protected?
APIs are the pipes that move your data between apps, devices and partners. They are also the least visible part of a system, and often the most rewarding target, because one weak API can expose far more than one weak page.
We test your APIs the way an attacker would: map what is exposed, probe how access is controlled, and verify whether data or actions can be reached that should not be.
What we test
Authentication: API keys, tokens and OAuth flows, and how they can fail
Authorization: whether changing an object ID or calling a function returns something it shouldn't
Rate limiting: whether an attacker can enumerate accounts or brute-force at scale
Input validation: injection, malformed payloads and fields the API was never meant to accept
Data exposure: whether responses return more fields than the client actually needs
Documentation and versioning: deprecated endpoints and accidental public exposure
How we test it
We agree the scope first: what to test, when, and what is off limits.
Testing combines manual work with automated tools and AI assisted analysis.
Every finding is verified by hand, with evidence captured for your team.
The weaknesses that matter
These are the kinds of findings this assessment is built to catch, each explained the way it would appear in your report.
OWASP API1:2023 (BOLA)
Broken object-level authorisation
Changing an object identifier in a request returns another user's records: a single API flaw that can expose an entire customer database.
OWASP API2:2023
Broken authentication
Tokens and API keys that never expire, can be replayed or are issued to anyone who asks. The attacker borrows a legitimate identity instead of breaking in.
OWASP API3:2023 (BOPLA)
Mass assignment
A field the API was never meant to accept, like a role or a balance, is accepted anyway, letting a user promote themselves or alter a value.
OWASP API4:2023
Unrestricted resource consumption
No rate limiting or cost controls means an attacker can enumerate accounts, hammer endpoints or drive up your bill, quietly and at scale.
OWASP API5:2023 (BFLA)
Broken function-level authorisation
An ordinary user calls an administrative function, creating, deleting or approving records, because the API checks the call, not the caller's role.
OWASP API7:2023 (SSRF)
Server-side request forgery
An API that fetches a user-supplied URL can be pointed at internal systems, cloud metadata, databases or admin panels that were never meant to be reachable.
What you receive
Executive summary written for decision-makers
Findings with severity, business impact and evidence
Practical remediation guidance for your team
Retest results after fixes are applied
When to perform it
Before a new API goes live, after significant changes, and whenever partner or customer data starts flowing through it.
Who it's for
Businesses with mobile apps, modern web frontends, partner integrations or any backend exposed over HTTP, which is most businesses running software today.
Common questions
Know where your security stands.
Tell us what you're building, operating or protecting. We'll help you determine where security testing should start.