Xiarch API & Web Service Penetration Testing is a professional security assessment service that identifies and exploits vulnerabilities in web services and APIs. The service is provided by Xiarch Solutions Private Limited, a CERT-IN empanelled and ISO 9001:2015 | ISO 27001-2013 certified cybersecurity company. The service conducts authorized penetration testing on various API types including SOAP, REST, and JSON-based web services. Testing covers authentication vulnerabilities, JSON web token issues, business logic flaws, injection vulnerabilities, and transport layer encryption weaknesses. The assessment methodology follows a six-phase approach: scope definition, information gathering using OSINT tools, enumeration, attack and penetration using manual and automated techniques, comprehensive reporting, and discussion with remediation support. Testing aligns with industry standards including OWASP Top Ten and PCI Compliance requirements. Deliverables include a detailed digital security assessment report with remediation steps, security certificates after patch verification, and access to qualified security consultants holding certifications such as CHECK Team Member, CEH, ECSA, OSCP, CISA, and CISSP. The service addresses security gaps in API-based applications that may provide direct access to critical business data, helping organizations prevent APIs from being used as attack vectors. Xiarch has served government organizations, Fortune 1000 companies, and startups across banking, insurance, and technology sectors.