---
title: "Official sales-tax rate (CA/WA)"
method: POST
path: "/api/locus_address_sales_tax"
tags: ["sales-tax", "commercial-tenant", "address", "read-only", "free", "free"]
---

# Official sales-tax rate (CA/WA)

`POST /api/locus_address_sales_tax`

## Request

- Base URL: `https://api.locus.report`
- URL: `https://api.locus.report/api/locus_address_sales_tax`
- Auth: none required

Official combined sales-tax rate by street address in California and Washington for agents checking a commercial lease. Outside coverage returns out_of_coverage; unmatched addresses and upstream failures are unavailable, never zero. Dated rate context, not tax advice or a taxable-sale determination. Direct flat-body route for this one free resource; no API key, payment, or catalog wrapper. Return only the cited bounded evidence described here; this route never produces a paid brief or full report.

## Request body

- object
  - `address` string, required: Full street address with city, state abbreviation and ZIP, e.g. 1 Dr Carlton B Goodlett Pl, San Francisco, CA 94102

## Response `200`

Free cited evidence response.

- object

## Other responses

- `400`: Invalid request body.
- `429`: Rate limited.

---

[API](https://skmtc.dev/locus/apis/locus-api.md) · [All operations](https://skmtc.dev/locus/apis/locus-api/llms.txt) · [OpenAPI document](https://skmtc.dev/locus/apis/locus-api/revisions/ba7786b74adb?raw)