Secure your APIs before attackers find authorization bypasses.

Comprehensive API security testing that exposes broken object-level authorization, authentication flaws, excessive data exposure, and business logic vulnerabilities across REST, GraphQL, and SOAP endpoints.

Expert-led testing aligned to OWASP API Security Top 10 with manual exploitation to validate real-world impact.

Are our APIs vulnerable to authorization bypasses?
Can attackers access sensitive data through our endpoints?
Do we meet OWASP API security standards?
Outcomes

API security that protects data and prevents unauthorized access.

Identify and fix authorization, authentication, and logic flaws before they lead to breaches.

Prevent data breaches

Identify broken authorization, excessive data exposure, and authentication flaws before attackers exploit them.

Protect business logic

Uncover workflow manipulation, rate-limit bypasses, and abuse scenarios that automated scanners miss.

Meet compliance requirements

Demonstrate security controls aligned to OWASP API Top 10, PCI DSS, GDPR, and regulatory standards.

Reduce attack surface

CVSS-scored findings with business context to prioritize remediation across microservices and integrations.

Compliance & Standards

Testing aligned to API security frameworks and regulations.

Demonstrate security controls for OWASP API Top 10 compliance and regulatory requirements.

OWASP API Top 10PCI DSSGDPRHIPAASOC 2ISO 27001
Methodology

Attacker-centric API testing that validates real security controls.

We test APIs the way attackers do—mapping endpoints, exploiting authorization gaps, and validating business logic.

Discovery & Enumeration

Map API endpoints, identify authentication mechanisms, and document data flows across REST, GraphQL, and SOAP.

Authentication Analysis

Test JWT validation, OAuth flows, API key management, and session handling for security weaknesses.

Authorization Testing

Validate object-level and function-level access controls through BOLA/BFLA exploitation attempts.

Business Logic Validation

Identify workflow manipulation, mass assignment, and rate-limit bypass scenarios with real impact.

Risk Assessment & Remediation

CVSS-scored findings with developer-friendly fixes and post-assessment validation support.

Testing process

Scope

Define API inventory, authentication, and testing depth.

Map

Enumerate endpoints and document request/response flows.

Test

Execute authorization, injection, and logic abuse tests.

Exploit

Demonstrate real-world impact with proof-of-concept.

Report

Deliver prioritized findings with remediation guidance.

Services

Complete API security coverage across protocols and architectures.

From REST to GraphQL, microservices to serverless—we test every API type.

REST API Testing

Comprehensive security assessment of RESTful APIs including authorization, authentication, and data exposure.

GraphQL API Testing

Query complexity analysis, introspection attacks, and authorization testing for GraphQL endpoints.

SOAP & XML-RPC Testing

Legacy API security testing including XXE, WSDL enumeration, and SOAP injection vulnerabilities.

Microservices Security

Inter-service authentication, service mesh security, and distributed authorization testing.

Third-Party API Integration

Security assessment of external API dependencies, OAuth flows, and API key management.

WebSocket & Real-time APIs

Security testing for WebSocket connections, message validation, and real-time data streams.

Mobile Backend APIs

Mobile-specific API testing including certificate pinning bypass and device fingerprinting.

API Gateway Security

Kong, Apigee, AWS API Gateway configuration review and security validation.

Serverless API Testing

Lambda, Azure Functions, and Cloud Functions security assessment and IAM policy review.

Testing Coverage

Comprehensive analysis of API-specific attack vectors.

We test the vulnerabilities that lead to data theft, account takeover, and business logic abuse.

Authorization

BOLA/IDORBFLAMass assignmentPrivilege escalation

Authentication

JWT flawsOAuth bypassesAPI key securitySession handling

Data Security

Excessive exposurePII leakageSensitive endpointsResponse filtering

Injection & Input

SQL injectionNoSQL injectionCommand injectionXSS in APIs

Logic & Rate Limits

Workflow abuseBusiness logicRate limitingResource exhaustion
Why Vulnuris

Expert API security testing that finds what scanners miss.

Automated tools can't validate authorization logic or business workflows—our experts can.

OWASP API expertise

Our testers specialize in BOLA, BFLA, mass assignment, and API-specific attack patterns that require manual validation.

Zero false positives

Every finding is validated with working proof-of-concept requests demonstrating actual exploitability.

Developer-focused fixes

Clear remediation guidance with code examples, framework-specific recommendations, and validation support.

Deliverables

Comprehensive API security documentation and remediation guidance.

From executive summaries to request-level proof-of-concepts, we provide actionable intelligence.

Executive summary with business risk analysis

Technical report with affected endpoints and parameters

BOLA/BFLA findings with authorization bypass demonstrations

Authentication and token handling vulnerabilities

Mass assignment and excessive data exposure issues

Injection vulnerabilities (SQL, NoSQL, command, XSS)

Business logic abuse and workflow manipulation scenarios

Rate-limit and resource exhaustion findings

CVSS v3.1 risk ratings mapped to OWASP API Top 10

Proof-of-concept request/response traces

Developer-focused remediation guidance with code examples

Retest validation report with fix verification

Industry Applications

Specialized API testing for regulated and high-risk environments.

Industry-specific threat modeling and compliance-focused API security assessments.

Financial Services

Secure payment APIs, banking integrations, and financial data endpoints against fraud and data theft.

Healthcare & Telemedicine

Protect patient health records and ensure HIPAA compliance for medical data APIs and integrations.

E-Commerce & Retail

Validate cart manipulation, payment processing, and customer data protection in commerce APIs.

SaaS & Technology

Secure multi-tenant APIs, third-party integrations, and microservices architectures at scale.

Engagement Options

Flexible API security programs for every development stage.

From quick audits to continuous security validation integrated into your CI/CD pipeline.

API Security Audit

Automated scanning with manual validation to identify common OWASP API Top 10 vulnerabilities.

Quick assessmentCore endpoints5-7 business days

Comprehensive API Pentest

Full manual testing including authorization bypass, business logic analysis, and deep exploitation.

Annual testingAll endpointsExecutive reporting

Continuous API Security

Ongoing testing integrated into CI/CD with regression testing and security metrics tracking.

Quarterly testingDevSecOps readySecurity dashboard
FAQ

Common questions about API penetration testing.

Clear answers to help you understand our API security testing approach.

API testing focuses specifically on programmatic interfaces, authentication mechanisms, authorization boundaries, and data structures. We test for API-specific vulnerabilities like BOLA, BFLA, mass assignment, and excessive data exposure that aren't typically found in traditional web app testing. API tests validate backend logic directly without the UI layer.

Secure your APIs before authorization bypasses lead to breaches.

Get expert API security testing with zero false positives and developer-focused remediation guidance.

Ready to secure your APIs?
Request Assessment