API Penetration Testing Services
Manual API security testing for SaaS, fintech and payment applications, focused on authorization, tenant boundaries and business logic.
- Test object and function authorization across agreed roles and tenants.
- Validate authentication, token handling and business-logic risks within scope.
- Receive evidence, reproducible findings and actionable remediation.
Who this is for
- SaaS teams needing an independent API test for an enterprise customer security review.
- Fintech and payment teams releasing API-driven features or changing transaction workflows.
- Engineering teams concerned about cross-tenant object access or privileged API functions.
- Growing businesses that need evidence and practical fixes for API authorization risks.
What you receive
- Endpoint and interface scope
- Use an endpoint inventory and specification documentation when available to agree targets, interfaces, exclusions and reporting needs. Protocol coverage is confirmed during scoping.
- Roles and rules of engagement
- Agree user roles, tenants, environments, authorization, test windows, permitted techniques and escalation contacts before testing.
- Object and function authorization
- Assess access to objects and functions across agreed accounts, roles and tenant boundaries.
- Authentication and token handling
- Validate authentication and token-related risks within the agreed API endpoints and interfaces.
- Business-logic and workflow testing
- Investigate workflow abuse. For payment applications, transaction and workflow authorization are tested only where explicitly agreed.
- Reproducible findings and fix guidance
- Receive an executive summary and technical findings with severity, evidence, reproduction steps and remediation guidance. An optional retest can verify agreed fixes.
How the engagement runs
- 01Define the scope
Review available endpoint documentation and agree authorized interfaces, roles, tenants, environments and exclusions.
- 02Assess the environment
Test object and function access, token handling and agreed business workflows within scope.
- 03Prioritize the findings
Validate reproducible API risks and rank them by exploitability and business impact.
- 04Deliver the action plan
Deliver evidence and remediation guidance, with optional retesting separately agreed.
Who you work with
ControlSolid's senior-led application-security work includes API testing aligned to the OWASP API Security Top 10, with a focus on authorization and business logic.
- Scope is tied to agreed API endpoints, interfaces, roles and tenants.
- Reporting gives engineering teams evidence and reproducible fix guidance.
API penetration testing is not PCI SSF validation or proof that every applicable PCI testing requirement is met. Share only a high-level scope and business need in the public form. Do not send credentials, API keys or sensitive system details.