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Check your inbox in a few minutesSecure your application's backend by identifying and remediating vulnerabilities in your REST, SOAP, and GraphQL APIs. We uncover broken authorization, data exposure, and business logic flaws before attackers can exploit them.
APIs (Application Programming Interfaces) are the connective tissue of modern web applications, mobile apps, and microservices. Because they transfer sensitive data directly between systems—often bypassing traditional front-end security controls—they have become a primary target for sophisticated cyberattacks.
API Penetration Testing involves systematically assessing these endpoints to uncover flaws like Broken Object Level Authorization (BOLA), mass assignment vulnerabilities, and excessive data exposure. We ensure that your data in transit is secure, your authentication mechanisms are airtight, and your business logic cannot be abused.
Frameworks & Standards We Apply
We begin by analyzing the API’s attack surface. This involves reviewing provided documentation (Swagger, OpenAPI, Postman collections) or reverse-engineering the web/mobile app to map undocumented or "shadow" API endpoints.
We analyze the request and response structures, identifying parameters, headers, and methods that process sensitive information, ensuring no endpoint is left untested.
Using specialized API testing tools, we perform deep vulnerability scanning and parameter fuzzing. We inject malformed data, unexpected characters, and massive payloads into the API endpoints to test input validation and error handling.
This automated and manual process helps uncover underlying SQL/NoSQL injections, command injections, and helps us evaluate the effectiveness of your API's rate-limiting and anti-automation controls.
APIs rely heavily on strict access controls. We aggressively test authentication mechanisms (like OAuth, JWT, SAML) for misconfigurations, weak signing algorithms, and token leakage.
We focus specifically on finding Broken Object Level Authorization (BOLA/IDOR) and Broken Function Level Authorization (BFLA)—ensuring that user A cannot access or manipulate the data belonging to user B or perform administrative actions.
Beyond technical vulnerabilities, we analyze the API for business logic flaws. This includes testing for Mass Assignment (modifying fields that shouldn't be user-editable, like `isAdmin=true`) and Excessive Data Exposure (where the API returns more sensitive data than the UI actually needs).
We string together complex, multi-step API requests to emulate how a sophisticated attacker might abuse the application's intended workflows to exfiltrate data or commit fraud.
A comprehensive API VAPT report is delivered within 48 hours of assessment completion. The report maps all findings directly to the OWASP API Security Top 10, including exact API requests and responses used to trigger the vulnerabilities.
We provide actionable, developer-friendly remediation steps and offer a free re-test after fixes are applied to verify your API is fully secured.
Choose the testing approach that matches your API environment and risk profile
Simulates an external attacker who has discovered your API endpoints but lacks documentation or valid credentials. We attempt to bypass authentication, discover hidden endpoints, and exploit public-facing parameters to breach the system.
The most common and effective method for APIs. Testers are provided with endpoint documentation (Swagger/Postman) and standard user credentials. Focus is heavily placed on testing authorization boundaries, such as BOLA/IDOR and privilege escalation.
A comprehensive assessment where security engineers have full access to the API's source code, architecture diagrams, and high-level administrative credentials. This allows for deep logic analysis, identifying complex flaws in backend database queries, insecure cryptographic implementations, and hidden administrative endpoints.
Prevent excessive data exposure and secure the direct pipelines that transfer your critical PII and financial records.
Ensure that third-party integrations, mobile backends, and internal microservices are safely communicating without risk of compromise.
Meet stringent requirements for PCI-DSS, GDPR, and SOC 2 by providing certified proof that your data interfaces are secure.
Stop attackers from manipulating API parameters, bypassing intended workflows, or elevating privileges to administrator levels.