# 402utils US Sales Tax State-Level Base Rates

> 402utils US Sales Tax State-Level Base Rates is a paid API for AI agents from 402utils.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-16).

Returns statutory state-only sales tax base rates for US states and DC, including mandatory statewide local add-ons and their combined effective minimum rate

## Facts

- Endpoint: GET https://402utils.com/v1/us-tax-rates
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/402utils-us-sales-tax-state-level-base-rates-ee1da0b7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HVMsAInrOIbLRXg_EJ-8e

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability 402utils-us-sales-tax-state-level-base-rates-ee1da0b7
```

Example prompt: What's the statutory state-level sales tax base rate for California, including any mandatory statewide local add-ons and the effective combined minimum rate?

## When to prefer this

Use this endpoint when you need quick, programmatic access to US state-level statutory sales tax base rates with mandatory statewide local add-ons. Prefer this over generic tax APIs when you need the statutory rate only (not estimated total rates including local jurisdictions), need all 51 jurisdictions at once, or need a transparent asOf date and source citations. Not suitable when you need city/county/district-level rates or a full tax calculation for a specific address.

## Known failure modes

- Invalid or unrecognized state code returns an error or empty result
- Network timeout or service unavailability
- Payment failure via x402 protocol prevents access
- Stale data if state legislature changes rates after asOf date

## How this service works

US sales tax STATE-LEVEL base rates for the 50 states + DC, as statutory percent. ?state=CA for one state, omit for all. Returns the state-only rate, any mandatory statewide local add-on (CA/UT/VA) and their sum. STATE BASE RATE ONLY — optional city/county/district rates are EXCLUDED and can add several points; not tax advice. Compiled from state statutes, cross-checked against two dated published trackers (asOf field included).

## Output

Returns a JSON object with: stateRate (state-only statutory percent), mandatoryLocalAddon (statewide local add-on percent, e.g. 1.25 for CA and UT), effectiveMinimumRate (sum of the two), state name, optional note, asOf date (when data was compiled), and sources array. When querying all states, returns a map of USPS codes to per-state objects. Always includes a disclaimer noting that optional city/county/district rates are excluded.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "state": {
       "type": "string",
       "description": "USPS two-letter code (e.g. CA, NY, DC). Omit to get all 51 jurisdictions."
      }
     },
     "description": "Query string only."
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "asOf",
      "sources",
      "disclaimer"
     ],
     "properties": {
      "asOf": {
       "type": "string",
       "format": "date"
      },
      "name": {
       "type": "string"
      },
      "note": {
       "type": "string"
      },
      "state": {
       "type": "string",
       "description": "Present when ?state was given."
      },
      "states": {
       "type": "object",
       "description": "Present when ?state was omitted: USPS code → per-state object."
      },
      "sources": {
       "type": "array",
       "items": {
        "type": "string"
       }
      },
      "stateRate": {
       "type": "number",
       "description": "State-only statutory rate, percent."
      },
      "disclaimer": {
       "type": "string"
      },
      "mandatoryLocalAddon": {
       "type": "number",
       "description": "Mandatory statewide local add-on, percent (CA 1.25, UT 1.25, VA 1.0, else 0)."
      },
      "effectiveMinimumRate": {
       "type": "number",
       "description": "stateRate + mandatoryLocalAddon."
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "asOf": "2026-07-01",
  "name": "California",
  "note": "1.25% mandatory statewide county rate → 7.25% floor everywhere",
  "state": "CA",
  "sources": [
   "Compiled from state statutes; cross-checked against Sales Tax Institute (as of 2026-07-01)",
   "Tax Foundation, State and Local Sales Tax Rates 2026 (as of 2026-01-01)"
  ],
  "stateRate": 6,
  "disclaimer": "State base rate only. Local (city/county/special-district) rates are excluded and can add several percentage points. Not tax advice.",
  "mandatoryLocalAddon": 1.25,
  "effectiveMinimumRate": 7.25
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/402utils-us-sales-tax-state-level-base-rates-ee1da0b7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 402utils.com](https://www.zero.xyz/host/402utils.com/llms.txt)