Peneto Labs: Penetration Testing Services

API Penetration Testing

APIs power your business — but they also expose critical data and backend systems. At Peneto Labs, we simulate real-world attack scenarios to identify API vulnerabilities before attackers do.
  • API Audit Certificate
  • Manual Testing
  • OWASP API Top 10
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Sample Report

Why API Security Testing Matters

APIs often serve as gateways to your core applications, data stores, and microservices. A single broken object-level authorization or misconfigured endpoint can lead to massive data leaks or full compromise.
Peneto Labs has tested mission-critical APIs across banking, healthcare, and SaaS platforms. Our team holds certifications like OSCP, OSCE, GPEN, and is CERT-In empanelled — ensuring credible, impactful assessments.
CERT-In Empanelled

CERT-In Empanelled

REST, GraphQL & SOAP

Developer-Focused Remediation

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What’s at Risk Without API Testing

  • Unauthorized access to sensitive data
  • Broken object-level authorization (BOLA)
  • Insecure API token storage and leakage
  • Over-permissive endpoints & input flaws
  • Logic flaws in workflows & transactions
  • Regulatory violations (PCI, GDPR, HIPAA)
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Our API Pentesting Includes

We go beyond scans with deep manual testing and real attack simulations. Our assessments follow OWASP standards— including API testing aligned with the OWASP API Security Top 10, using Burp Suite, Postman, and custom scripts to uncover vulnerabilities that automated tools often miss. simulations:

Business Logic Manipulation

Authentication & Authorization Flaws

Rate Limiting & Access Control Testing

Token Leakage & Session Misuse

Parameter Tampering & IDOR

Protocol Misuse (REST, GraphQL)

JWT, OAuth2 & SSO Weaknesses

API Privilege Escalation Testing

Reverse Engineering & Code Tampering

Testing is performed on both staging and production environments — including authenticated API calls, logic abuse scenarios, and real-world exploit simulations.
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Process

Our API Security Testing Process

01

Scope & Endpoint Mapping

We discover API surface area, document endpoints, roles, methods, and auth flows.

02

Manual Testing & Exploitation

Our team manually tests for API-specific flaws across auth, data access, and logic flow.

03

Reporting & Retesting

You get clear, risk-ranked findings with developer guidance, PoCs, and free re-testing.

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Sample Certificate of Penetration Testing

What You’ll Receive from our API Security Assessment:

Our API security reports decode complex threats — like broken auth, logic flaws, and injection vectors — into actionable guidance for developers and high-level summaries for management.

  • Risk-Based Technical Report 
  • Executive Summary for Stakeholders 
  • Remediation Guidance for Dev Teams 
  • Exploit PoCs for Critical Issues 
  • Free Re-Testing for Verified Fixes 
  • CERT-In Compliant Audit Certificate
Download Sample Report

Client Testimonials

Some words from our clients

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We recently partnered with Peneto Labs

to conduct vulnerability and penetration testing on our IT infrastructure, and we couldn't be more satisfied with the experience. From beginning to end, their team showed outstanding expertise and professionalism. They delivered a comprehensive report filled with actionable recommendations and provided multiple solution walkthroughs. Their guidance was instrumental in resolving issues, ultimately helping us obtain an audit certificate. This certificate was crucial for achieving compliance with our client. We highly recommend Peneto Labs penetration testing services.

CEO

Anniyam Payment

We can say with confidence

that Peneto Labs are a team of highly skilled and dedicated professionals who have always provided excellent and prompt IT security auditing services which helped us to closing the security gaps in our organisation and prevent compromise.

Dokonally

We’ve been working with Pentolabs

for our VAPT needs and we are happier with their services. They’re professional, efficient and have helped us improve our security posture of the application & infrastructure significantly. Their source code reviews are especially helpful in identifying vulnerabilities. Highly recommended.

Technical Architect

Axlerate Futuretech

The Phishing email services

offered by Pentolabs have been excellent which is an essential part of Cyber Security awareness which was very effective to understand for the security managers on how people react to such emails. I personally recommend it to anybody who wants to increase their Cyber threat awareness. An Ideal and a must for all employees in the organization. Thank you Pentolabs

Senior Manager - Cyber Security & BCP

National Commodity Clearing Limited

We have been conducting security assessments

for the 14 years. However, Peneto Labs expertise, Methodology, and reporting are world class. No reports from our past vendors match their quality & skills. They have done a wonderful job.

Manager

IT. String Information Services

The team at Peneto Labs are highly trained

, extremely knowledgeable, professionals who have assisted us in the successful installation of our firewall. Peneto Labs is an amazing company who has always been a fantastic support for our business. They are fast, reliable, friendly and helpful, and always available in case of an emergency. The staff are really experienced and we would not hesitate to recommend them highly to any business

I.T Head

Expertus
Geojit (1)
federal-bank (1)
aditya-birla-capital (1)
karur-vysya-bank (1)
dhanlaxmi-bank (1)
axis-finance (1)
m2p-fintech
photon
manappuram
latentview
hexagon
ncdex

Don’t Let APIs Become Your Weakest Link

Unsecured APIs can be silent entry points into your systems. Peneto Labs finds these risks before attackers do.
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Frequently Asked Questions

APIs play a critical role in modern applications by enabling data exchange between systems, mobile apps, web platforms, and third-party services. However, they also create a significant attack surface. 

API Penetration Testing is essential because poorly secured APIs can expose sensitive data, authentication tokens, or business logic, making them prime targets for attackers. Testing helps identify security flaws before they can be exploited, ensuring that your APIs are robust, compliant, and safe to use in production environments.

API Penetration Testing can uncover a wide range of vulnerabilities that attackers often exploit. These include broken authentication and authorization, excessive data exposure, lack of rate limiting, insecure endpoints, injection flaws like SQL or command injection, insecure communications, and misconfigured access controls. 

We also assess for logic-based vulnerabilities and improper input validation that could lead to data leakage or privilege escalation. At Peneto Labs, we use both automated tools and manual testing to ensure no critical gaps are missed.

Yes, API Penetration Testing is often necessary to meet compliance requirements for data protection and cybersecurity standards. Regulations like PCI-DSS, HIPAA, GDPR, and ISO 27001 emphasize the importance of secure data transfer and robust access controls—both of which directly involve APIs. 

Our API testing services provide detailed reports with risk ratings, technical evidence, and remediation guidance, all of which support compliance documentation and audit readiness.

 Once the test is complete, you’ll receive a comprehensive report that outlines each vulnerability discovered during the assessment. For each issue, we include a description of the technical risks, its potential impact, technical details of the exploit, and clear remediation steps. 

The report also features an executive summary for leadership teams, a methodology section, and optional mapping to compliance standards. If retesting is required after you implement fixes, we provide an updated report confirming whether the issues have been resolved.

API Penetration Testing should be performed regularly, ideally once a year, or whenever critical changes are made to the API infrastructure. This includes the addition of new endpoints, changes in authentication mechanisms, integrations with third-party systems, or architectural overhauls. Testing on a routine basis helps you stay ahead of evolving threats and maintain a strong security posture as your API ecosystem grows.

While no security measure can offer 100% protection, API Penetration Testing significantly reduces the risk of data breaches by uncovering and helping you fix exploitable vulnerabilities. 

APIs often handle sensitive data such as customer information, financial records, or access tokens. If left unprotected, these assets are vulnerable to unauthorized access or abuse. Testing acts as a proactive defense mechanism by identifying security issues before malicious actors can exploit them.

Our API testing process is designed to be non-disruptive and performance-safe. Tests are typically conducted in a staging or test environment that mirrors your production setup to avoid impacting live traffic. 

If testing must be conducted in production, we coordinate carefully with your team to ensure minimal risk. We avoid running stress tests or denial-of-service attacks unless specifically requested. Your API’s availability and performance remain a top priority throughout the engagement.