Valency Networks REST API VAPT Service provides penetration testing and vulnerability assessment specifically for REST APIs. The service identifies security weaknesses in REST API implementations including broken authentication, authorization flaws, excessive data exposure, injection vulnerabilities, and rate limiting issues. The service tests for common API attack vectors such as token mismanagement, misconfigured access controls, insecure endpoints, and business logic flaws. Testing methodology covers authentication mechanisms, input validation, access controls, and data exposure risks. The service examines vulnerabilities aligned with OWASP API Security Top 10, including broken authentication and authorization, excessive data exposure, injection attacks (SQL, NoSQL, Command), and rate limiting weaknesses. Testing identifies issues like weak token management, missing access controls, predictable session IDs, overly verbose API responses, and unvalidated input fields. Case studies demonstrate experience across multiple industries including FinTech, Healthcare, Retail/E-Commerce, Cloud/SaaS, and Transportation/Logistics. The service addresses real-world scenarios such as token validation flaws, unauthenticated endpoints, enumeration exploits, insecure API configurations, and business logic abuse. The service aims to identify data breach risks, prevent unauthorized access, and mitigate potential financial losses and reputational damage from compromised REST APIs.