SAT.WS is a Mexican fintech platform that provides API-based solutions for accessing and processing tax data from Mexico's tax authority (SAT - Servicio de Administración Tributaria). The company operates in the open finance and regulatory technology space, offering tools that enable businesses to retrieve, validate, and analyze fiscal information through automated digital interfaces. SAT.WS serves financial institutions, fintech companies, accounting firms, and businesses that require programmatic access to official tax documents, invoices (CFDIs), and compliance data. The platform's API infrastructure allows clients to integrate SAT data directly into their systems for purposes including credit scoring, KYC verification, financial analysis, and accounting automation. By digitizing access to Mexico's fiscal ecosystem, SAT.WS helps companies streamline operations that traditionally required manual document collection and verification. The service is particularly relevant for lenders performing financial due diligence, accounting software providers building tax compliance features, and enterprises managing vendor validation. Based in Cuauhtémoc, Ciudad de México, the company addresses a critical need in Mexico's digital financial infrastructure by bridging the gap between government tax data and private sector applications. The platform's focus on SAT integration positions it at the intersection of open finance, RegTech, and financial data infrastructure, enabling more efficient and accurate financial decision-making across multiple sectors.