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Welcome to the Antei API documentation.

Our API provides a comprehensive and reliable interface for calculating tax rates, validating customer tax IDs, and ensuring global compliance across multiple jurisdictions. Whether you’re integrating tax rules into your checkout flow or building reconciliation workflows, the Antei API offers a modular, secure, and developer-friendly experience.

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Use Cases

  • Determine real-time tax rates for any location and customer type
  • Validate international tax IDs (GSTIN, VAT, etc.)
  • Perform unified tax + validation calls in a single request
  • Fetch global or local tax exposure details
  • Build tax-aware invoices and billing flows with ease

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Customer Profile

  • Developers building financial or invoicing products
  • Businesses with cross-border sales and tax compliance needs
  • Enterprise platforms managing tax reconciliation and audit readiness

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API Base URLs

Depending on your environment, use the appropriate base URL:
Live: https://api.antei.com
Sandbox: https://sandbox.antei.com
All API calls are made over HTTPS.