Korean public holidays with substitute-holiday logic, plus accurate Revised Romanization of Korean text - in one fast, zero-dependency JSON API on a global edge. Check if any date is a public holiday, list a year's holidays, romanize Hangul, or get today's Korea date and holiday status. Lunar-solar conversion, the 24 solar terms and the sexagenary cycle coming in v1.1.

The Experimentation Nexus API Interface provides a comprehensive set of tools for researchers and developers to design, manage, and analyze experiments in a seamless way. With endpoints for experiment creation, data collection, and analytics, users can efficiently orchestrate complex experimentation workflows and gain insights into their results. The API supports integration with various data sources and offers customizable templates for A/B testing, multivariate testing, and user feedback collection, making it an essential resource for data-driven decision-making.

Streamline ERP fiscal integration with our ERP Fiscal Integration Validator API, ensuring your documents meet SEFAZ schema requirements.

Detect and pinpoint errors in e-invoice XML with our E-invoice Error Checking API — returns the exact element paths that failed.

Catch schema errors in your fiscal documents with our Fiscal Document XML Validator API, ensuring straightforward compliance checks.

Verify CT-e XML schema compliance quickly using our CT-e XML Schema Compliance API for hassle-free validations.

Validate and verify NF-e XML documents seamlessly with our reliable NF-e XML Validation Service API.

Check your NF-e XML against current SEFAZ schemas and catch errors before submission.

Ensure NFC-e accuracy with our Validation and Error Check API, streamlining your fiscal compliance effortlessly.

Clarify corporate structures and ownership with detailed CNPJ insights for businesses.

Traverse complex ownership hierarchies with our multi-hop CNPJ traversal API.

Perform credit risk analysis and enrich CNPJ data to mitigate financial threats.