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Getting Started
Introduction
API overview
Authentication
Quickstart
Trial → Production
SDKs
Python (taxql)
Guides
Address normalization
Choosing input mode
Confidence envelope
Error handling
Handling warnings
Historical queries
Postman
Response shape & modes
State-specific notes
Canada (beta)
Canada API usage
Canada limitations (v1.1)
Canada (beta)
Canadian rates & sources
Concepts
Components vs combined
Effective dates
Data freshness
How sales tax works (in the US)
Nexus thresholds (Wayfair)
API Reference
Overview
Tax Lookup
Overview
Look up sales tax for an address, ZIP, or coordinates
(Legacy alias) Look up Texas tax — prefer /v1/tax/{state}
Portability — Rates & Orders
Overview
Compatible rate lookup (address / decomposed / lat-lng / ZIP)
Compute tax for an order
List available product tax categories (TIC)
Portability — Nexus
Overview
Per-state economic-nexus status (Wayfair tracking)
Bulk-import historical transactions for Wayfair tracking
List the calling account's stored nexus registrations
Add (or upsert) a nexus registration
Remove nexus registration(s) for a state
Health
Overview
Liveness probe
Per-state rate-data refresh status
Changelog
Python SDK — Changelog
Status
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Overview
Health
Section titled “Health”
Liveness probe + version surfacing.
