Web Services & API Security Assessment
Secure Your APIs. Protect Your Data. Fortify Your Digital Ecosystem.
API Security is Critical for Modern Applications
APIs are the backbone of modern digital infrastructure, enabling seamless communication between applications, services, and devices. However, they also represent a significant attack surface. Our Web Services & API Security Assessment provides comprehensive testing of REST APIs, SOAP services, GraphQL endpoints, and microservices architectures. With over 3000+ API assessments completed, our team has deep expertise in identifying vulnerabilities that could expose sensitive data or compromise your entire system.
Comprehensive API Security Coverage
API Security Assessment Types
REST API Testing
Comprehensive security assessment of RESTful APIs including endpoint security, HTTP method validation, parameter tampering, and response analysis. We test for IDOR, mass assignment, and improper resource exposure vulnerabilities.
GraphQL Security Testing
Specialized testing for GraphQL APIs including introspection attacks, query depth analysis, batching attacks, and authorization bypass. We identify over-fetching vulnerabilities and sensitive data exposure through complex queries.
SOAP/XML Web Services
Security testing for SOAP-based web services including XML injection, XXE attacks, WSDL exposure analysis, and WS-Security implementation review. We validate message integrity and confidentiality mechanisms.
Automated API Security Scanning
Our automated scanning phase utilizes industry-leading tools like Burp Suite, OWASP ZAP, and custom scripts to rapidly identify common API vulnerabilities. We scan for authentication flaws, injection points, misconfigured CORS policies, and sensitive data exposure. This provides a baseline security assessment before our manual deep-dive testing.
Manual API Penetration Testing
Our expert security engineers manually test your APIs for complex vulnerabilities that automated tools cannot detect. This includes business logic flaws, chained attack scenarios, race conditions, and subtle authorization bypasses. We simulate real-world attack scenarios to identify how an attacker could chain multiple vulnerabilities to compromise your system.
How it works?
Our API Testing Methodology
We follow a rigorous methodology aligned with OWASP API Security Top 10 and industry best practices. Our approach combines automated scanning with manual testing to uncover both common vulnerabilities and complex business logic flaws unique to your API implementation.
API Discovery & Mapping
Enumerate all API endpoints, understand data flows, and document authentication mechanisms.
Authentication & Authorization Testing
Test OAuth, JWT, API keys, and session management for weaknesses and bypass vulnerabilities.
Input Validation Testing
Test all input parameters for injection attacks, data type mismatches, and boundary conditions.
Business Logic Analysis
Analyze API workflows for logic flaws, rate limiting bypass, and privilege escalation.
Report & Remediation
Deliver detailed findings with proof-of-concept exploits and prioritized remediation guidance.
API Security Vulnerabilities We Detect
Broken Object Level Authorization (BOLA/IDOR)
Broken Authentication
Broken Object Property Level Authorization
Unrestricted Resource Consumption
Broken Function Level Authorization
Mass Assignment
Server-Side Request Forgery (SSRF)
Security Misconfiguration
Improper Inventory Management
Unsafe Consumption of APIs
JWT Token Manipulation
API Key Exposure
What you can expect from us
OWASP API Top 10 Coverage
Our testing methodology covers all OWASP API Security Top 10 vulnerabilities plus additional attack vectors specific to your technology stack. We ensure comprehensive coverage of authentication, authorization, and data protection controls.
API Documentation Review
We review your API documentation (OpenAPI/Swagger, RAML, API Blueprint) to identify security gaps, missing authentication requirements, and potential data exposure risks before testing begins.
Detailed Technical Reports
Receive comprehensive reports with detailed vulnerability descriptions, proof-of-concept code snippets, API request/response samples, and step-by-step remediation guidance tailored for your development team.
Compliance Alignment
Our API security assessments align with PCI-DSS, HIPAA, SOC 2, and GDPR requirements. We provide compliance-focused recommendations to help you meet regulatory obligations.
Free Remediation Retest
After your team implements fixes, we provide a complimentary retest to verify that vulnerabilities have been properly remediated and no new issues have been introduced.
Do you know?
99%
of organizations reported API security incidents in 2025, with 34% involving sensitive data exposure or privacy issues.
40%
of all API breaches in 2025 were caused by Broken Object Level Authorization (BOLA), making it the top API vulnerability.
95%
of API attacks in 2025 used authenticated sessions, highlighting the critical need for robust authorization testing.
Get more with Digital Defense
Complete API Inventory
Discover and document all API endpoints including shadow APIs and deprecated versions.
Authentication Analysis
Comprehensive testing of OAuth 2.0, JWT, API keys, and custom authentication mechanisms.
Business Logic Testing
Identify flaws in API workflows that could lead to fraud, data theft, or privilege escalation.
Remediation Support
Work with your development team to implement secure coding practices and API security best practices.