API Security Testing involves the assessment of application programming interfaces (APIs) to identify security weaknesses and prevent unauthorized access, data leaks, or service disruption. As APIs become a foundational layer in modern applications, securing them is vital. API testing ensures that communication between services is secure, authenticated, and authorized, especially in microservices, cloud-native, and mobile environments.
Verifies secure implementation of OAuth, JWT, API keys, and other access mechanisms.
Ensures that endpoints enforce role-based access control (RBAC) and prevent privilege escalation.
Checks for injection vulnerabilities like SQL Injection, Command Injection, and XML External Entity (XXE).
Validates proper sanitization of user input.
Tests the API's ability to withstand abuse via excessive or malformed requests.
Validates rate limiting, throttling, and DoS (Denial-of-Service) protections.
Ensures sensitive data is not exposed in API responses or error messages.
Checks encryption in transit (TLS/HTTPS) and proper handling of PII.
Tests for token predictability, leakage, reuse, and secure storage.
Validates proper session expiration and refresh token behavior.
Identifies flaws in the workflow or transaction logic of the API.
Checks for improper sequence validation or pricing manipulation.
- Secures endpoints that exchange sensitive data (e.g., tokens, customer info, payment data).
- Reduces risk of unauthorized access through unprotected or improperly configured APIs.
- Helps comply with PCI-DSS, GDPR, HIPAA, ISO 27001, and other security standards.
- Produces evidence of security validation for audits and regulatory checks.
- Ensures APIs can be safely used by third-party partners and internal teams.
- Protects mobile apps, web platforms, and microservices that rely on APIs.
- Identifies and eliminates unnecessary or undocumented endpoints ("shadow APIs").
- Assures minimal exposure and proper security configurations.
- Provides feedback to API developers on secure design practices.
- Promotes secure-by-design principles in API lifecycle management.
- Prevents potential losses from security incidents and downtime.
- Ensures secure releases, reducing costly rollbacks or emergency patches.
As organizations rapidly adopt APIs for microservices, mobile apps, and integrations, each exposed API becomes a potential attack vector.
Cloud-native and containerized environments depend heavily on secure APIs. API testing ensures resilience across Kubernetes, serverless, and multi-cloud infrastructures.
Both public-facing and internal APIs can be exploited if misconfigured or vulnerable. Testing both is essential for full-stack security.
We deliver high-quality, affordable cybersecurity solutions with flexible pricing tailored to your needs. We build lasting partnerships with our...
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