REST API Testing
The most common API architecture, tested for authentication, authorization, and input handling issues.
Secure Your APIs Against Modern Cyber Threats
API Penetration Testing & Security Assessment Services
Your APIs are your product's backbone, and they're often the easiest way in for an attacker. PlutoSec manually tests your REST, GraphQL, and SOAP APIs against the OWASP API Top 10 to find broken authorization, data exposure, and abuse paths before they reach production.
- Certified API Penetration Testing Experts
OSWE and OSCP certified testers specialize in REST, GraphQL and SOAP API security assessments.
- Real World Testing Methodology
We exploit authentication, authorization and logic flaws the way real API attackers do.
- Clear Security Reporting
Reports map findings to the OWASP API Top 10 with clear guidance for your development team.
- Confidential & Secure
Network access and test findings remain confidential under strict non disclosure terms.
About API Security Testing
Trusted API Penetration Testing Services
APIs power everything from mobile apps to partner integrations, which means a single weak endpoint can expose far more than a typical web page ever could. API security testing is a manual assessment of your endpoints, authentication, and authorization logic to find the flaws that perimeter tools like firewalls and gateways simply can't catch.
The most damaging API issues rarely show up in an automated scan. A user changing an order ID in a request and pulling up someone else's data, or a low privilege account reaching an admin only function, are logic problems that need a human tester thinking like an attacker. With APIs now driving most modern applications, testing them on their own, separate from the web or mobile front end, has become essential.
Comprehensive API Coverage
Manual, Expert Led Testing
OWASP API Top 10 Alignmen
Actionable Remediation Guidance
INDUSTRIES WE SERVE
Security Expertise Across Every Sector
From regulated industries to critical infrastructure, our assessments are scoped for your sector's specific threats and compliance requirements.
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Ready to Strengthen Your Cybersecurity?
Protect your business with expert led security assessments, penetration testing, and managed security services. Talk to our specialists today.
Book a Free ConsultationOur Testing Methodology
- 1.
Scoping and planning
We review your API documentation, endpoints, and authentication model to define the test plan.
- 2.
Endpoint discovery
We map every accessible endpoint, including ones not listed in your documentation.
- 3.
Vulnerability discovery
We test each endpoint against the OWASP API Top 10 categories.
- 4.
Controlled exploitation
We validate findings like BOLA and broken authentication with real, working proof of concept.
- 5.
Risk analysis
We rate each finding by what an attacker could actually access or do, not just a severity label.
Why Choose Plutosec
Expert API Security Testing
Modern businesses rely on APIs to power applications, integrations, and digital services. PlutoSec helps organizations secure these critical assets through expert API security testing, vulnerability identification, and clear remediation guidance before attackers can exploit them.
API Security Experts
Our consultants specialize in identifying vulnerabilities across REST, SOAP, GraphQL, and modern API environments.
Real World Testing
We simulate attacker techniques to uncover authentication, authorization, and data exposure risks.
Actionable Remediation
Receive clear recommendations to fix vulnerabilities and strengthen API security controls.
Detailed Reporting
Comprehensive technical and executive reports provide complete visibility into security findings.
What We Cover
GraphQL Testing
We test query depth, introspection exposure, and batching abuse specific to GraphQL schemas.
SOAP and Legacy API Testing
We assess older API formats still running in many enterprise environments.
Mobile Backend API Testing
We test the APIs behind your iOS and Android apps, often the weakest link in mobile security.
Third Party and Partner API Testing
We assess integrations with external vendors that connect into your environment.
Pre Release API Testing:
We test new endpoints before they go live in production.
Our Approach
- API Discovery and Documentation Review
- Authentication and Authorization Testing
- Injection and Input Validation Testing
- Business Logic and Workflow Abuse
What You Get
- Executive & Technical Reporting
- Proof-of-Concept Exploitation
- Risk Prioritization (CVSS)
- Actionable Remediation Guidance
Tools We Use
- Burp Suite Professional
- Postman
- OWASP ZAP
- GraphQL Voyager and InQL
- Arjun
- Ffuf and Wfuzz
- JWT Tool
- Custom Python Scripts
Get Started
Ready to Strengthen Your Cybersecurity?
Protect your business with expert led security assessments, penetration testing, and managed security services. Talk to our specialists today.
Book a Free ConsultationWhy API Security Testing Matters
Prevent Unauthorized Access
Identify authentication and authorization weaknesses before attackers can exploit them.
Protect Sensitive Data
Secure customer, financial, and business critical information from exposure and unauthorized access.
Reduce API Security Risks
Discover and remediate vulnerabilities that could lead to data breaches or service compromise.
Secure Business Integrations
Ensure APIs, cloud services, and third party connections remain protected against modern cyber threats.
CLIENT VOICES
What our clients say
4.89 / 5based on 93 verified reviews
Insights & Research
ThreatResearch,CVEAnalysis,andSecurityGuides
Hands on analysis from our engineers, current vulnerabilities, emerging attack patterns, and the security decisions shaping enterprise risk in 2026.
1 min readFeb 14, 2026By Admin
Cloud Security in 2026: What Businesses Must Know to Protect Data
Cloud security is evolving fast in 2026, and Canadian businesses need to be prepared. From new threats to compliance requirements, learn how to protect your cloud
Read articleFAQ
Frequently asked questions
Answers to the questions we hear most. Still unsure how it applies to your environment? Our engineers are happy to talk it through.
What's the difference between API testing and web application testing?
Web app testing focuses on the front end a user interacts with. API testing focuses on the back-end endpoints powering that app, mobile clients, and any integrations, which often have separate, less visible vulnerabilities.
Do you need our API documentation to test?
It helps speed things up, but it's not required. We can also test undocumented or "shadow" endpoints we discover during the engagement.
What is BOLA and why does it matter so much?
Broken object level authorization happens when an API doesn't properly check whether a user is allowed to access a specific record. It's the leading cause of real-world API breaches because it's easy to miss and easy to exploit.
Can you test GraphQL APIs?
Yes. We test for introspection exposure, query depth abuse, batching attacks, and authorization issues specific to GraphQL schemas.
How often should we test our APIs?
At least once a year, and after any major change to authentication, authorization logic, or new endpoint releases.
Will testing disrupt our production environment?
We test in a controlled way and can work against staging environments where available, to avoid any impact on live traffic.
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Ready to See What Your Current Security Is Missing?
Book a short consultation with PlutoSec and get a practical view of where your current security model may be exposed.