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Quantumbastions

API Security Testing

Test and protect your APIs from harmful threats and vulnerabilities with Quantumbastions API security testing services. Test, identify, and eliminate potential vulnerabilities and threats from your APIs with quantumbastions API security testing services. Secure your APIs, secure your sensitive data.

How does an API work?

When you use an API, like a flight booking app, it connects to the internet and sends data (to perform an action or fetch information) to a destination server. Upon receiving the data, the server interprets it, takes necessary actions based on the request, and sends the data back to the user’s device. Next, the application interprets the data and shows you the data you requested in a format that you can read and understand.

A glowing “API” interface is visualized on a digital map, surrounded by icons representing users, data points, devices, and global connectivity—symbolizing how APIs enable critical communication across systems and platforms. A person holds a smartphone in focus, indicating real-time interaction with cloud-based services, mobile apps, or IoT devices through exposed APIs. The futuristic blue tones and grid overlay convey a sense of advanced, high-volume data exchange. This image perfectly captures the importance of API Security Testing—ensuring every exposed endpoint is validated, every data flow protected, and every user authenticated in an interconnected digital ecosystem.

APIs (Application Programming Interfaces) are the backbone of modern digital ecosystems—powering web apps, mobile platforms, cloud services, IoT devices, and third-party integrations. While they enable seamless connectivity and data exchange, they also expand the attack surface. Improperly secured APIs can expose sensitive data, authentication tokens, or system-level access to malicious actors.

 

Our API Security Testing Services are designed to identify and eliminate vulnerabilities in your APIs before they can be exploited. We conduct thorough testing that includes both automated scanning and manual ethical hacking, aligned with OWASP API Security Top 10 standards and real-world threat models.

 

Whether you’re developing REST, SOAP, GraphQL, or custom APIs, we help ensure your interfaces are secure, reliable, and compliant with industry regulations.

 


 

🔍 What We Test:

 

  • Authentication & Authorization:
    Evaluate the robustness of access controls, token validation, session handling, and role-based restrictions (RBAC).

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  • Input Validation & Injection Flaws:
    Detect SQL injection, command injection, XML/JSON tampering, and other attacks via improperly sanitized user inputs.

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  • Data Exposure:
    Identify whether sensitive data (e.g., PII, credentials, tokens) is exposed in responses, logs, headers, or URLs.

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  • Rate Limiting & Abuse Protections:
    Assess protection against brute-force, enumeration, denial-of-service (DoS), and replay attacks.

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  • Business Logic Testing:
    Examine how APIs handle misuse, abuse of functions, unexpected input sequences, and privilege escalation scenarios.

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  • Token & Session Security:
    Review OAuth2, JWT, API key handling, and cookie management practices for secure usage and expiration logic.

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  • Error & Exception Handling:
    Verify that error responses don’t leak internal details like stack traces or system paths.

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  • Transport Layer Security:
    Ensure all data transmissions use HTTPS with strong TLS protocols, certificates, and cipher suites.

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Why API Security Testing Matters:

 

  • Protect sensitive data and backend systems

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  • Prevent unauthorized access and privilege escalation

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  • Comply with GDPR, HIPAA, PCI-DSS, ISO 27001, and industry best practices

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  • Avoid breaches that can impact business reputation and customer trust

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  • Enable safe API integrations with third-party applications and partners

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  • Strengthen DevSecOps practices by shifting security left in the development lifecycle

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Whether you’re building a single microservice or a full-scale enterprise API gateway, our API Security Testing Services provide the assurance you need to innovate confidently.

 

Secure every connection. Protect every transaction.

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