Web Application & API Protection
Real-time threat detection and prevention for all API traffic using Nginx reverse-proxy architecture. Blocks SQL injection, DDoS, and OWASP Top 10 vulnerabilities before they reach your origin servers.
APIs are the backbone of modern applications—and one of the most targeted attack surfaces. Osto's professional API penetration testing services systematically uncover authentication flaws, injection vulnerabilities, broken access controls, and logic errors before malicious actors exploit them. Built for startups and scaling enterprises, our testing goes beyond automated scans to deliver manual, expert-driven assessments with actionable remediation guidance.
Comprehensive API security assessments covering every layer of your API attack surface, from authentication to business logic.
Real-time threat detection and prevention for all API traffic using Nginx reverse-proxy architecture. Blocks SQL injection, DDoS, and OWASP Top 10 vulnerabilities before they reach your origin servers.
AI-powered scanner that automatically analyzes API endpoints, scores security posture, and categorizes vulnerabilities by severity with step-by-step remediation guidance for every discovered issue.
Full-spectrum vulnerability assessment and penetration testing delivered as a managed service, combining automated discovery with manual expert analysis to surface critical API security gaps.
Integrate API security testing earlier in the development lifecycle to catch vulnerabilities at the design and development stage, reducing remediation costs and preventing issues from reaching production.
Automatically detects and intelligently profiles API traffic patterns using machine learning, providing smarter visibility into anomalies, abuse, and misuse in real time.
Enforces Zero Trust principles for API access with secure authentication workflows and granular access controls, ensuring only verified identities and devices can reach sensitive API resources.
We begin by mapping your full API attack surface—REST, GraphQL, SOAP, or gRPC—documenting all endpoints, authentication methods, and data flows. This ensures no endpoint is missed and testing is precisely scoped to your environment.
See how Osto has helped startups and scaling enterprises secure their APIs and eliminate critical vulnerabilities.
Osto combines AI-powered automation with deep manual expertise to deliver API security testing that is thorough, fast, and built for modern businesses.
Our machine learning algorithms deliver 2x faster vulnerability detection with improved accuracy, reducing noise and surfacing what matters most.
Every test is mapped to the OWASP API Top 10, ensuring comprehensive coverage of the most critical and frequently exploited API vulnerability classes.
Detailed findings include precise endpoint locations, severity ratings, and step-by-step remediation guidance your developers can act on immediately.
Osto is designed for growing startups and enterprises that need enterprise-grade API security without the overhead of a large dedicated IT security department.
A dedicated team of cybersecurity experts committed to securing modern APIs.
Osto was built with a single mission: to simplify cybersecurity for new age businesses without compromising on depth or rigor. As a comprehensive cybersecurity platform, Osto has rapidly expanded its capabilities—from core web application protection and API security to full multi-cloud posture management across Azure, AWS, and GCP. Through continuous innovation, including the launch of AI-driven adaptive protection profiling, audit logs, and Zero Trust network access, Osto has established itself as a trusted security partner for startups, growing businesses, and scaling enterprises that demand agility and modern cyber resilience from their security stack.
API penetration testing is a security assessment that simulates real-world attacks against your API endpoints to identify vulnerabilities before malicious actors do. APIs are a primary target for attackers because they directly expose backend logic and data. Testing helps uncover broken authentication, injection flaws, excessive data exposure, and access control issues that automated scanners alone often miss.
Talk to an Osto security expert for a free consultation tailored to your API environment.
All API assessments aligned to the OWASP API Top 10 standard
Verified security posture management across Azure, AWS, and GCP
Machine learning-driven threat detection and vulnerability assessment certified
Fill out the form below and an Osto security specialist will reach out to discuss your API environment, define the testing scope, and provide a tailored assessment plan. Most engagements can be scoped and initiated within 48 hours.
For immediate assistance, feel free to give us a direct call at You can also send us a quick email at connect@osto.one
For immediate assistance, feel free to give us a direct call at You can also send us a quick email at connect@osto.one