API and application endpoint security testing
AI systems don’t operate in isolation. Q9 Continuous tests the APIs and endpoints that connect them to your business: fuzzing, BOLA, IDOR and authentication bypass for AI-connected infrastructure.
01What it does
What it does
API and endpoint testing covers AI-facing APIs and model endpoints, the interfaces through which applications, users and other systems reach your AI.
These interfaces inherit classic weaknesses, so testing combines established API security techniques with the specifics of how AI endpoints accept input and return output.
Coverage is confirmed during scoping, based on the endpoints and authentication flows your application exposes.
02Risk register
Risks we evaluate
What Q9 Continuous tests for within your agreed scope. Coverage is confirmed during scoping; not every item applies to every deployment.
- 04.01Authentication bypassWays to reach AI endpoints without valid credentials.
- 04.02BOLA and IDORBroken object-level authorisation that exposes other users’ data or conversations.
- 04.03Authorisation flawsFunctions or models a caller can reach beyond their role.
- 04.04Rate limitingWhether endpoints can be abused for cost, data harvesting or denial of service.
- 04.05Injection surface exposureInput paths that carry injection into the model or connected systems.
- 04.06FuzzingUnexpected or malformed input that triggers errors, leaks or unsafe behaviour.
03Who needs it
Who needs it
- Teams exposing model endpoints or AI features through public or partner APIs.
- Products where AI features sit behind existing web and mobile APIs.
- Organisations integrating third-party AI services into their own infrastructure.
04Approach
How Q9 Continuous tests it
Every test follows the same path, agreed in writing before any testing starts.
Discovery
We map your AI architecture, understand your threat model, and define what’s in scope based on your risk appetite and compliance obligations.
Agreed scope & written authorisation
Scope, environments, accounts and testing windows are agreed in writing. Nothing is tested without written authorisation from the people responsible for the system.
Testing
Q9 Continuous runs AI-driven tests against the authorised system, tailored to your deployment.
Human-reviewed findings
Every finding is reviewed by a person before it reaches you, with severity, context and stated limitations.
Reporting & remediation
Severity ratings, reproduction steps and remediation guidance your engineering team can act on, plus an executive summary for board-level reporting.
Re-testing where agreed
Where agreed, fixes are re-tested within the authorised scope through Continuous AI Pen Testing.
Testing runs on Q9 Continuous: fixes and significant changes can be re-tested within the authorised scope, and Q9 Driftmark (early access) can show when a checked system changes. Automated checks complement, and do not replace, independent penetration testing.
05Deliverables
What you receive
- A findings report with severity ratings, reproduction steps and remediation guidance
- An executive summary for board-level reporting
- Coverage of the endpoints and authentication flows in scope
Each test is a point-in-time check of an agreed scope. It is not a certification and does not guarantee that every risk has been found.
What We Test
Other things we test
- 01
Large language models
Prompt injection, jailbreaks, unsafe model behaviour and the data a model can reach.
- 02
Retrieval-augmented generation (RAG)
Retrieval pipelines, vector stores and knowledge-base isolation.
- 03
Agentic AI and tool execution
Autonomous agents, the tools they call and the permissions they hold.
- 05
AI application security controls
Model access, data flows, trust boundaries, secrets and monitoring.
- 06
AI usage discovery
Finding AI systems and integrations so they can be brought into testing scope.