OpenTIN API - API to verify the vaildity of Tax Identification Numbers

OpenTIN API is a SaaS solution that enables automated validation of Tax Identification Numbers (TINs) according to official OECD and CRS specifications.
It helps financial institutions, fintechs, regtech providers, and compliance teams verify whether a TIN is structurally valid for a given country, improving data quality and reducing compliance risk.

The API supports country-specific TIN formats, length rules, and structural checks as defined by international standards. By integrating OpenTIN API into onboarding, KYC, AML, and reporting workflows, organizations can automatically detect invalid or malformed TINs before submission to regulators or counterparties.

OpenTIN API is designed for easy integration via a simple REST interface and can be used in real time or batch processing scenarios. It is particularly well suited for use cases such as customer onboarding, tax residency validation, regulatory reporting, data cleansing, and cross-border compliance processes.

Delivered as a fully managed cloud service, OpenTIN API removes the need to maintain local validation logic and ensures consistent application of up-to-date international rules. Availability through Azure Marketplace allows customers to deploy quickly, scale on demand, and consolidate billing within their existing Azure environment.