Professional API Penetration Testing Services

APIs Tested & Secured

Client Satisfaction Rate

Complete Assessment Delivery

API Vulnerabilities Discovered

Organizations experienced API security incidents

Increase in API attacks over past year

Average cost of API-related data breach

APIs have critical security vulnerabilities

🔒 Broken Object Level Authorization

Broken object level authorization (BOLA) allows users to access objects they shouldn’t by manipulating object IDs in API requests. Our REST API penetration testing thoroughly examines every API endpoint testing parameter tampering, insecure direct object references, and authorization bypass techniques. We verify that API authentication and authorization testing properly enforces access controls preventing horizontal privilege escalation where users access other users’ data at same permission level.

Testing Approach: Systematic object ID manipulation, authorization boundary testing, cross-user data access attempts, API token security validation, and complete authorization workflow evaluation.

⚡ Broken Function Level Authorization

Broken function level authorization allows users to access functions beyond their permission level. Our API security assessment tests administrative functions, privileged operations, and restricted endpoints verifying proper role-based access control. We attempt vertical privilege escalation gaining admin privileges, test hidden API endpoints, and verify that function-level authorization prevents unauthorized access to sensitive operations like user management, configuration changes, and data exports.

Testing Approach: Role-based access testing, privilege escalation attempts, hidden endpoint discovery, administrative function testing, and complete permission boundary evaluation.

🔑 Broken Authentication Mechanisms

API authentication flaws allow attackers to assume user identities or bypass authentication entirely. Our comprehensive API authentication testing examines OAuth testing for token vulnerabilities, JWT security for signature validation and expiration, API key management for exposure and rotation, session handling, and multi-factor authentication implementation. We test credential stuffing protection, token hijacking scenarios, and authentication bypass techniques specific to REST APIs, GraphQL APIs, and SOAP web services.

Testing Approach: OAuth flow testing, JWT manipulation, API key exposure detection, authentication bypass attempts, session management review, and token lifecycle validation.

📊 Excessive Data Exposure

Excessive data exposure occurs when APIs return more data than necessary, exposing sensitive information. Our API vulnerability assessment identifies API responses containing unnecessary personal data, internal system details, or confidential business information. We examine API response manipulation possibilities, test for sensitive data in error messages, and verify proper output encoding. GraphQL security testing specifically checks for over-fetching vulnerabilities where clients query excessive data.

Testing Approach: Response content analysis, sensitive data identification, error message review, GraphQL query testing, and data minimization verification.

⚠️ Lack of Resources & Rate Limiting

Missing or inadequate rate limiting allows API abuse through excessive requests causing denial of service, data scraping, or brute force attacks. Our API rate limiting testing verifies proper throttling mechanisms, API monitoring capabilities, and resource consumption limits. We test for API fuzzing vulnerabilities, parameter tampering that bypasses rate limits, and lack of resources protection ensuring APIs can’t be overwhelmed by malicious traffic.

Testing Approach: Rate limit bypass testing, API throttling evaluation, resource exhaustion attempts, brute force protection testing, and denial of service resistance verification.

💉 Injection Attacks in APIs

Injection vulnerabilities in APIs allow attackers to inject malicious code through API parameters. Our professional API security testing identifies SQL injection in database queries, NoSQL injection in document databases, command injection in system calls, LDAP injection, XML injection, and other injection vectors. We test input validation, parameter tampering resistance, and proper sanitization across all API endpoints ensuring comprehensive injection protection.

Testing Approach: Comprehensive injection testing across all parameters, automated API fuzzing, input validation verification, output encoding review, and exploitation proof of concept.

🔧 Mass Assignment Vulnerabilities

Mass assignment allows attackers to modify object properties they shouldn’t by binding request parameters to code objects. Our RESTful API security testing identifies mass assignment vulnerabilities where API requests can modify restricted fields like user roles, pricing, or administrative flags. We test parameter tampering across all API endpoints verifying proper whitelist implementation and field-level authorization preventing privilege escalation through mass assignment.

Testing Approach: Systematic parameter addition testing, object property manipulation, privilege escalation through mass assignment, whitelist verification, and field-level authorization validation.

⚙️ Security Misconfiguration

API security misconfiguration includes improper CORS policy testing, missing security headers, verbose error messages, exposed API documentation, default configurations, and unnecessary HTTP methods. Our API security evaluation examines API gateway security, service mesh security configurations, API versioning security, and API schema validation. We identify misconfigurations in REST APIs, GraphQL endpoints, and SOAP services that could expose sensitive functionality or data.

Testing Approach: Configuration baseline review, CORS policy evaluation, security header verification, API documentation exposure testing, and complete infrastructure security assessment.

📝 Improper Assets Management

Improper API assets management occurs when organizations lose track of API versions, endpoints, or documentation. Our web API penetration testing discovers shadow APIs, deprecated API versions still accessible, undocumented endpoints, and old API versions with known vulnerabilities. We inventory all API assets ensuring proper API monitoring, API logging, and lifecycle management preventing attacks through forgotten or unsupported API endpoints.

Testing Approach: API endpoint discovery, version enumeration, shadow API identification, deprecated endpoint testing, and complete API asset inventory creation.

🔐 Insufficient Logging & Monitoring

Insufficient API logging and monitoring prevents detection of API attacks and security incidents. Our comprehensive API security assessment evaluates API logging coverage, API monitoring systems, alerting mechanisms, and incident detection capabilities. We verify that security events are properly logged, logs are protected from tampering, and monitoring can detect attacks like API abuse, authentication failures, and authorization violations enabling effective incident response.

Testing Approach: Logging coverage assessment, monitoring system evaluation, alert mechanism testing, incident detection validation, and log integrity verification.

Certified API Security Testers

Our certified API security testers hold specialized certifications and extensive API testing experience. They understand REST API security, GraphQL vulnerabilities, OAuth complexities, JWT security, and microservices architecture. Our team has performed 600+ API security assessments discovering thousands of critical API vulnerabilities across diverse technology stacks and implementation patterns.

• Specialized API security certifications
• 10+ years API testing experience
• Deep knowledge of API technologies
• Proven track record with 600+ assessments

Specialized API Testing Methodology

Our API penetration testing methodology specifically targets API vulnerabilities following OWASP API Security Top 10 and API security testing best practices. We test broken object level authorization, broken function level authorization, mass assignment, excessive data exposure, rate limiting, and API-specific injection attacks that general web testing misses.

• OWASP API Security Top 10 coverage
• REST, GraphQL, SOAP testing expertise
• Authentication & authorization focus
• API-specific vulnerability identification

Advanced API Penetration Testing Tools

We use specialized API penetration testing tools including Burp Suite Professional for API testing, Postman for API endpoint testing, custom scripts for OAuth testing and JWT security validation, API fuzzing tools, and proprietary tools for GraphQL security testing. Our toolkit enables comprehensive API vulnerability assessment beyond what standard web scanners can achieve.

• Enterprise API testing tools
• Custom OAuth and JWT testing scripts
• GraphQL-specific security tools
• Automated and manual testing combination

Comprehensive API Security Audit Report

Every API security audit includes detailed documentation covering all tested endpoints, authentication mechanisms, authorization logic, and discovered vulnerabilities. Reports include API security audit checklist coverage, proof of concept exploits, CVSS scoring, business impact analysis, and specific remediation recommendations with code examples for developers.

• Executive summary for stakeholders
• Technical findings with proof of concept
• API-specific remediation guidance
• Secure coding examples included

All API Types & Architectures

Our comprehensive API security testing covers REST API penetration testing, GraphQL security testing, SOAP API testing, microservices security testing, API gateway testing, mobile API penetration testing, cloud API security testing, third-party API security testing, and internal API penetration testing. We secure entire API ecosystems regardless of architecture complexity.

• REST, GraphQL, SOAP, gRPC support
• Microservices architecture expertise
• Cloud-native API security testing
• Mobile backend API assessment

API Security Services & Support

Professional API penetration testing services include ongoing remediation support, developer consultation, secure API design guidance, and free re-testing. We help development teams fix vulnerabilities correctly, implement proper API authentication and authorization, and establish API security testing best practices for continuous protection.

• 90-day remediation support included
• Developer security training
• Secure API design consultation
• Free comprehensive re-testing

API Discovery & Documentation

Initial Assessment Phase:

• Complete API endpoint discovery and enumeration
• API documentation review (Swagger, OpenAPI)
• Technology stack identification (REST, GraphQL, SOAP)
• Authentication mechanism mapping (OAuth, JWT, API keys)
• API versioning and deprecation analysis
• Third-party API integration identification

Authentication & Authorization Testing

Security Controls Evaluation:

• OAuth testing for token vulnerabilities
• JWT security validation and manipulation
• API key management and exposure testing
• API token security and lifecycle testing
• Broken object level authorization testing
• Broken function level authorization testing
• Session management security evaluation

Comprehensive Vulnerability Testing

Deep Security Assessment:

• Mass assignment vulnerability testing
• Excessive data exposure identification
• API rate limiting testing and bypass attempts
• Injection attack testing (SQL, NoSQL, command)
• Parameter tampering and input validation
• API fuzzing for unexpected behaviors
• Business logic vulnerability assessment

Reporting & Remediation

Documentation & Support:

• Comprehensive API security audit report
• Proof of concept exploit development
• CVSS scoring and risk prioritization
• API-specific remediation recommendations
• Secure coding examples for developers
• 90-day remediation support
• Free re-testing of fixed vulnerabilities

Basic API Assessment

Essential API security testing

Perfect for small API projects

• Up to 15 API endpoints tested
• REST API penetration testing
• Basic authentication testing
• Common vulnerability assessment
• API security report included
• CVSS scoring and risk rating
• 30-day remediation support
• Email consultation

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Professional API Testing

Comprehensive API security assessment

Ideal for most organizations

• Up to 50 API endpoints tested
• REST & GraphQL security testing
• OAuth and JWT security testing
• Complete authorization testing
• Mass assignment vulnerability testing
• Rate limiting assessment
• Comprehensive API security audit
• Proof of concept exploits
• Executive presentation
• 60-day remediation support
• One free re-test included

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Enterprise API Security

Complete API ecosystem testing

For large API ecosystems

• Unlimited API endpoints testing
• REST, GraphQL, SOAP testing
• Microservices security assessment
• API gateway security testing
• Complete OAuth/JWT analysis
• Third-party API security testing
• Mobile API penetration testing
• Cloud API security assessment
• Service mesh security testing
• Executive presentation with Q&A
• 90-day premium support
• Unlimited re-testing

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SafetyBis REST API penetration testing discovered critical broken object level authorization allowing users to access any account data. Their OAuth testing identified JWT security vulnerabilities we never would have found. The comprehensive API security assessment was exactly what we needed for our SaaS platform. Outstanding API security services.

Their GraphQL security testing uncovered excessive data exposure vulnerabilities in our mobile API. The API authentication and authorization testing was incredibly thorough. Professional API penetration testing services that actually understand modern API architectures. The detailed API security audit report made remediation straightforward.

We needed comprehensive microservices security testing for our cloud infrastructure. Their API penetration testing methodology covered our entire API ecosystem including API gateway security and service mesh security. Found critical mass assignment and rate limiting vulnerabilities. Best API security testing investment we’ve made.

What is API penetration testing?

API penetration testing is specialized security assessment targeting Application Programming Interfaces examining authentication mechanisms, authorization logic, rate limiting, injection vulnerabilities, and API-specific security risks. Professional API security testing covers REST API penetration testing, GraphQL security testing, SOAP API testing, and microservices security testing identifying broken object level authorization, broken function level authorization, mass assignment, excessive data exposure, and other critical API vulnerabilities. Comprehensive API vulnerability assessment combines automated scanning with manual testing by certified API security testers.

How much does API penetration testing cost?

API penetration testing cost varies based on API complexity, endpoint count, and testing depth. Basic API security testing costs $4,000-6,000 for small APIs with 10-15 endpoints. Professional API penetration testing services range $9,000-12,000 for medium APIs with 30-50 endpoints. Comprehensive enterprise API security assessment costs $18,000-25,000 for large API ecosystems with microservices. Factors affecting cost include authentication complexity (OAuth, JWT), API types (REST, GraphQL, SOAP), third-party integrations, and required testing depth. Investment prevents API breaches averaging $5.9 million making professional API security testing extremely cost-effective.

What API penetration testing tools do you use?

Our professional API security testing uses specialized API penetration testing tools including Burp Suite Professional for comprehensive API testing, Postman for API endpoint testing, custom OAuth testing and JWT security validation scripts, GraphQL-specific testing tools, API fuzzing tools for input validation, and proprietary tools for authorization testing. However, tools alone are insufficient—our certified API security testers perform extensive manual testing for broken object level authorization, broken function level authorization, mass assignment, business logic flaws, and API-specific vulnerabilities that automated tools cannot detect. Comprehensive API security assessment requires combination of automated scanning and expert manual testing.

How often should we perform API security testing?

Minimum: annual comprehensive API security assessment for all production APIs. Recommended: quarterly API vulnerability assessment for business-critical APIs and public endpoints. Essential: immediate API penetration testing after new endpoint releases, authentication changes, or major updates. Continuous: automated API security monitoring and rate limiting testing. For mobile API penetration testing and third-party API security testing, test whenever integrations change. Internal API penetration testing should occur semi-annually for microservices architectures. Regular professional API security testing ensures ongoing protection against evolving API-specific threats and authorization vulnerabilities.

Do you test GraphQL and microservices?

Yes! Our comprehensive API security testing includes specialized GraphQL security testing examining query depth limits, query complexity, over-fetching vulnerabilities, introspection exposure, and GraphQL-specific injection attacks. We provide extensive microservices security testing covering service-to-service authentication, API gateway security, service mesh security, distributed authorization, and inter-service communication security. Our professional API penetration testing services support REST API penetration testing, GraphQL APIs, SOAP API testing, gRPC, and all modern API architectures including mobile API penetration testing and cloud API security testing ensuring complete API ecosystem protection.

What’s included in the API security audit report?

Every API security audit report includes comprehensive documentation covering executive summary for stakeholders, detailed technical findings with proof of concept, API security audit checklist coverage verification, OWASP API Security Top 10 mapping, broken authorization vulnerabilities (object and function level), mass assignment findings, excessive data exposure issues, rate limiting assessment, OAuth testing and JWT security results, injection vulnerabilities, CVSS scoring and risk ratings, business impact analysis, specific remediation recommendations with code examples, and API security testing best practices guidance. Reports serve as complete documentation for developers, security teams, and compliance requirements.

600+ APIs Tested

Proven API expertise

Certified API Testers

Specialized expertise

All API Types

REST, GraphQL, SOAP

90-Day Support

Complete remediation help