API Security Testing that proves your APIs enforce the security you designed.
Go beyond traditional API security scanning. Continuously test API authorization, BOLA and BOPLA, object access, business logic, and multi-step workflows under real runtime conditions. Aptori understands the application behind each API—then actively validates whether security weaknesses can be exploited.
Test. Prove.
Understand the application before you test the API.
API security testing validates whether APIs securely enforce authentication, authorization, object access, input handling, and application behavior. But the hardest vulnerabilities are rarely visible in an endpoint alone. They emerge from business logic, identity, relationships, state, and workflow context.
Semantic Runtime Validation gives Aptori the context to test those behaviors. Instead of treating every request as an isolated transaction, Aptori builds a semantic model of how the application is expected to work—then actively tests whether those expectations can be violated at runtime.
Aptori asks: “Given this identity, object, relationship, workflow, and business context—should this action be possible?”
testable behavior.
APIs are not just endpoints.
Modern API risk lives in the relationships between identities, objects, permissions, tenants, and workflows. Traditional scanners see requests and responses. Aptori models the security behavior the application is supposed to enforce.
Identities
Users, roles, services, partners, agents, and tenants.
Objects
Accounts, records, resources, transactions, and sensitive data.
Relationships
Ownership, permissions, dependencies, and access boundaries.
Workflows
Sequences, approvals, state transitions, and business processes.
Runtime behavior
What the application actually permits when controls are exercised.
security
behavior
API authorization testing for BOLA, IDOR, and broken access control.
A request can be syntactically valid, authenticated, and return HTTP 200—and still expose another user’s data. Aptori changes identity, object, role, tenant, and request context to validate the authorization decision itself.
Authorization: Bearer USER_A
ownership(88421) = USER_B
decision = DENY
Authorization: Bearer USER_A
response = 200 OK
exploit = PROVEN
API business logic testing across multi-step workflows.
Some of the most consequential API weaknesses only emerge through sequences. Aptori explores state transitions, approval paths, privilege changes, and multi-step workflows to test assumptions that payload scanners cannot see.
Expected workflow
CONTROL HOLDSAbusive workflow
EXPLOIT PATHProve exploitable API vulnerabilities with runtime evidence.
Every validated issue should answer what happened, who could exploit it, what was exposed, why the control failed, and whether the fix actually closed the path.
- Identity
- USER_A / customer role
- Object
- account_id 88421 / owner USER_B
- Request
- GET /api/v2/accounts/88421
- Observed
- HTTP 200 with cross-account customer data
- Root cause
- Object ownership is not enforced before data retrieval.
- Retest
- Replay same identity + object path after remediation.
Continuous API security testing in CI/CD.
Run the right depth of validation throughout development and release workflows, then carry the same evidence chain through remediation and retesting.
Secure APIs used by humans, applications, and AI agents.
The security question remains the same: should this identity be able to perform this action on this object in this context? Aptori continuously tests the answer.
API security testing coverage for modern application risk.
Aptori combines semantic understanding with runtime validation across authorization, business logic, identity, workflow, data exposure, and agent-driven API behavior.
Test for OWASP API Security Top 10 risks—and the business logic behind them.
Aptori helps teams validate API security weaknesses associated with the OWASP API Security Top 10, including broken object level authorization, broken authentication, broken object property level authorization, broken function level authorization, unrestricted access to sensitive business flows, and other authorization and API abuse risks.
Evaluating API security testing.
What is API security testing?
API security testing evaluates whether APIs securely enforce authentication, authorization, object access, input validation, business logic, and application workflows. Aptori adds semantic application context and runtime validation to prove exploitable behavior.
How is API security testing different from API scanning?
API scanning commonly evaluates endpoints, schemas, parameters, and individual requests. Aptori also models identities, objects, authorization, tenant boundaries, application state, and multi-step workflows, then validates behavior at runtime.
How does Aptori test BOLA and IDOR?
Aptori varies identity, object, role, and tenant context and observes whether the API correctly enforces object ownership and access controls. Exploitable behavior is preserved with runtime evidence.
Can Aptori test API business logic?
Yes. Aptori models and exercises multi-step workflows to identify sequence manipulation, workflow bypass, state abuse, privilege transitions, and application-specific security assumptions.
Can API security testing run in CI/CD?
Yes. Sift is designed for continuous validation during development, CI/CD, staging, release, and remediation workflows so teams can find and close exploitable API risk earlier.
Can Aptori test APIs used by AI agents?
Yes. Aptori can validate APIs and application workflows invoked by users, services, AI applications, agents, and tool-calling systems while preserving the relevant identity and application context.
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