Securing Your APIs

Manual API Pentesting

Manual API pentesting focuses on identifying security vulnerabilities in application programming interfaces — the connective tissue between your front-end, back-end, and third-party services. APIs are frequent targets for attackers because they expose business logic and data directly, often with less scrutiny than traditional web interfaces.

Common Vulnerabilities

• Broken Object Level Authorization (BOLA): Accessing data belonging to other users by manipulating resource identifiers.
• Broken Authentication: Exploiting weak token handling, missing rate limiting, or insecure credential flows.
• Excessive Data Exposure: APIs returning more data than the client needs, leaking sensitive fields.

Modern applications rely heavily on APIs — REST, GraphQL, and gRPC endpoints that power everything from mobile apps to microservices. Each endpoint represents a potential attack surface that automated scanners frequently miss because they lack the context to understand your API's intended behavior. Manual API pentesting closes that gap by combining tool-assisted discovery with expert human analysis.

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Our OSCP-certified pentesters map your entire API surface, including undocumented and legacy endpoints, then test for the OWASP API Security Top 10. We probe for authorization flaws, mass assignment vulnerabilities, improper rate limiting, and injection attacks across every endpoint. Findings are validated manually to eliminate false positives and presented with clear proof-of-concept evidence your developers can act on immediately.

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API pentesting is increasingly required for compliance frameworks including SOC 2, PCI DSS, and HIPAA, particularly as regulators recognize APIs as a primary data breach vector. Our detailed, developer-friendly reports provide the evidence auditors need and the remediation guidance your engineering team can implement before your next release cycle.