The reliable tax rate data layer for apps, automations, and AI agents

Do not make AI guess tax rates. Give your software a deterministic tax-rate tool with ZIP/postal-code lookup, as-of dates, and audit-aware ingestion behind a simple JSON API.

50 States + D.C. 51 U.S. jurisdictions

Agent Ready OpenAPI-friendly

Date Effective As-of lookups

Coverage by jurisdiction

ALAKAZARCACOCTDEDCFLGAHIID ILINIAKSKYLAMEMDMAMIMNMSMO MTNENVNHNJNMNYNCNDOHOKORPA RISCSDTNTXUTVTVAWAWVWIWY

Updated this week Update failed this week Active coverage No state sales tax Review watch

51 U.S. jurisdictions 13 Canada provinces 27 EU VAT countries 0 guessed rates

Deterministic API response

GET /api/v1/rates ZIP 51358

{
  "zip": "51358",
  "rate": 0.07,
  "effective_date": "2026-06-05",
  "components": ["state", "local"],
  "audit_status": "validated_daily"
}

CollectDaily records NormalizeJurisdiction schema VersionAs-of date records ServeStable JSON API

Built for Deterministic Tax Rate Calls

AI Tool Layer

Stable lookup output for agents, quote flows, and internal automations.

Date-Effective Rates

Ask for the current rate or the rate that applied on a specific date.

Audit-Aware Ingestion

Daily validation, controlled publishing, and historical rate records.

Run health02:14 UTC

Update pipeline telemetry

Rate componentsZIP 51358

State6.0%

Local1.0%

Special0.0%

Canonical rate component model

JSON contract200 OK

Stable, readable API outputs

Ecommerce Extension Paths

TaxAutomator starts as the API-first rate layer, then ships thin adapters for common commerce stacks where merchants need deterministic tax-rate calls.

WooCommerce

First-class WordPress plugin for WooCommerce tax-rate matching. Download plugin.

Shopify

Research-gated app proxy adapter for quote and checkout-extension backends.

BigCommerce

Partner-pilot tax provider adapter for quote payloads and computed tax amounts.

Magento 2

Enterprise starter module with a dependency-injected TaxAutomator client.

PrestaShop

Community starter module for ZIP/postal-code rate lookups.

OpenCart

Community starter model for storefront tax estimate integrations.

Operational Workflow

1. Collect

Collect daily records.
Check completeness.

2. Normalize

Parse into one schema.
Diff changes.

3. Serve

Return dated rates.
Report run health.

Pricing

Self-serve validation access and paid production tiers priced for real tax-aware workloads.

Starter

$0/month

For teams validating accuracy and integration flow before production traffic.

10,000 API calls per month
Self-serve validation access
ZIP lookup and jurisdiction breakdown

Start Free

Developer

$19/month

For small production apps that need reliable monthly lookup volume.

25,000 API calls per month
Annual option: $190/year
Daily nationwide updates
Email support

Launch

$49/month

For early SaaS and commerce teams running tax lookups in production.

250,000 API calls per month
Annual option: $490/year
As-of-date queries and audit-ready validation context
Launch guidance by email

Scale

$149/month

For growing multi-store or multi-system workflows that need higher throughput.

1,000,000 API calls per month
Priority ingestion and health telemetry
Business-hours support

Business

$399/month

For high-volume production teams that need stronger operational support.

2M API calls per month
Advanced audit reports and rate change alerts
Priority support and onboarding

Enterprise

Custom annual

For compliance-heavy organizations requiring custom contracts and support models.

Unlimited query volume options
SLA and dedicated onboarding
Security and procurement support

Contact Sales

API Access

Test the API or open checkout.

Subscribe to API Access

Select a plan and continue through Stripe Checkout.

Selected plan: Launch

Choose Developer, Launch, Scale, or Business to open Stripe Checkout.