API VAPT
API security is different from web security: we test auth logic, endpoint exposure, business flows, rate limiting, and data leakage in service-to-service APIs.
Security context before security testing.
APIs expose business objects and privileged operations directly. A single authorization mistake can allow bulk data access, cross-account changes or administrative actions without ever touching the browser interface.
We build an endpoint and object model, compare permissions across users and roles, then test how the API behaves under manipulation. The assessment covers documented and discovered endpoints, token trust, object-level authorization, rate controls and workflow abuse.
Your platform is API-first or used by multiple client applications
Endpoints handle sensitive objects across users or tenants
The API uses OAuth, JWTs, service accounts or third-party integrations
Undocumented or legacy versions may still be reachable
What our specialists examine.
Coverage is adapted to your architecture and risk profile. These modules form the baseline for a complete api vapt.
Endpoint and schema discovery
Documented, undocumented, versioned and GraphQL operations, parameters and object relationships.
Object-level authorization
BOLA, IDOR, cross-tenant access and ownership changes across read and write operations.
Function-level authorization
Administrative actions, hidden methods, role escalation and privileged workflow access.
Token and identity trust
JWT validation, OAuth flows, scopes, refresh behavior, service tokens and session invalidation.
Input and data handling
Mass assignment, injection, excessive data exposure, unsafe deserialization and file processing.
Abuse and resilience controls
Rate limits, enumeration, replay, resource consumption, batching and business-flow automation.
What we need to begin efficiently.
Perfect documentation is not required. A clear starting point helps us confirm scope, reduce setup time and spend more of the engagement testing the risks that matter.
Assets and boundaries
A current list of the api vapt assets, environments and exclusions that should be covered.
Representative access
Docs, collections or traffic, plus the roles, accounts or technical context needed to test realistic trust boundaries.
Operational contacts
A technical owner, emergency contact, approved testing window and any production constraints we should follow.
Architecture and priorities
Relevant diagrams, recent changes, high-value workflows and known concerns help us focus effort where failure matters most.
Share your architecture or business objective. We will help turn it into a practical assessment boundary and testing plan.
Start a scoping conversation →A controlled assessment with clear checkpoints.
You know what is being tested, what has been proven and what your team needs to do next throughout the engagement.
Inventory and scope
We map API endpoints, data models and authorization flows before testing begins.
Attack path validation
We test for broken object-level authorization, mass assignment, and insecure direct object access.
Remediation guidance
We deliver actionable fixes with example payloads and verify them after patching.
Report, debrief and retest
We explain the attack paths, support remediation and verify submitted fixes with updated evidence.
Evidence your teams can actually use.
The output is designed for remediation, decision-making and assurance, not just for archiving after the test.
API attack-surface inventory
A tested view of endpoints, methods, roles, objects and versions observed during the engagement.
Reproducible request evidence
Raw requests, response differences, object references and repeatable proof for each finding.
Authorization findings matrix
Clear mapping of which identities can perform sensitive operations and where controls fail.
Remediation guidance
Practical fixes for authorization middleware, schema controls, token validation and abuse prevention.
Retest and closure report
Verification of patched endpoints with updated request evidence and final status.
Bring us in when the decision carries real risk.
Secure a new public or partner API
Validate object access, token handling and abuse controls before integrations go live.
Test multi-tenant authorization
Confirm customer and workspace boundaries remain intact as roles and objects expand.
Review OAuth or gateway migration
Assess trust changes introduced by a new identity provider, gateway or service mesh.
One assessment. Clear outcomes for every team involved.
The same technical evidence is translated into the context each audience needs to make decisions, implement fixes and demonstrate assurance.
Reproduce and resolve findings faster.
Receive evidence, root-cause context and practical remediation guidance directly from the specialists who performed the work.
Prioritize risk with defensible context.
Understand exploitability, attack paths, systemic control gaps and the fixes that reduce the most meaningful exposure.
Use clear evidence for assurance decisions.
Get an executive view, standards mapping and verified closure status that can support governance, customer and audit conversations.
Security testing conducted with operational discipline.
A strong assessment must protect the systems and information it is intended to secure. These controls apply throughout the engagement.
Written authorization
Scope, permitted techniques, excluded assets and responsible contacts are agreed before any assessment activity begins.
Controlled execution
Testing follows defined windows, rate limits and production-safe rules with an immediate escalation and stop process.
Protected evidence
Engagement data and proof are access-controlled, handled confidentially and retained only for the agreed period.
Verified communication
Critical issues are escalated as soon as they are confirmed, with direct access to the specialist for remediation questions.
What teams ask before kickoff.
We finalize scope, access and safety controls before testing. These are the questions we answer most often for this service.
What do you need to begin an API assessment?
Do you test undocumented endpoints?
Can you test service-to-service APIs?
Ready to make this assessment part of your security program?
We scope your environment, verify the risks, and hand you a remediation-ready report your team can act on.
Receive an engagement plan and transparent quote within one business day.
Request a quote →No obligation. NDA available before scoping.