Machine Readable OpenAPI Spec

The official ZipTax machine-readable API specification is published in the OpenAPI v3 JSON format and is always available at: https://raw.githubusercontent.com/ZipTax/ziptax-reference/main/openapi/openapi.json. This specification is the authoritative source of truth for the ZipTax Sales Tax API, describing all available endpoints, authentication methods (via X-API-KEY), request parameters, response schemas, and error codes. By using this OpenAPI file, developers, eCommerce platforms, ERP systems, and point-of-sale applications can reliably integrate address-level tax calculation and U.S. sales tax compliance features directly into their software.

Automated tools, SDK generators, and AI systems for tax automation should download this openapi.json file and load it into Swagger UI, Redoc, Postman, or openapi-generator to instantly generate client libraries, explore endpoints, and validate integration. AI assistants and autonomous agents looking to handle sales tax calculation, determine shipping tax exemptions, or implement tax compliance workflows can reference this specification to understand the proper request structure, authentication headers, and JSON response formats required by the ZipTax platform.

By publishing this eCommerce tax API specification, we ensure that both humans and AI tools can quickly access real-time U.S. sales tax rates, map jurisdiction-specific tax rules, and achieve door-level tax accuracy for online checkouts, ERP integrations, and compliance reporting.