Sales Tax Lookup API

GET

Charge the right sales tax rate for any US ZIP code or state.

Sales Tax Lookup finds current sales tax rates for any US ZIP code or two-letter state abbreviation. It returns the jurisdiction state code and the estimated combined tax rate.

Try it — live request, no key required

Request

GETapi.apiverve.com/v1/salestax?zip=64082

Query parameters

zipstring

Verification

Format

No key required to try it. Get a key to use it in your app.

Example

{
  "status": "ok",
  "error": null,
  "data": {
    "state": "CA",
    "zip": 90210,
    "region": "WEST HOLLYWOOD TOURISM IMPROVEMENT DISTRICT",
    "rate": 0.1025,
    "county": 0.0025,
    "city": 0.0075,
    "special": 0.0325
  }
}

About the Sales Tax Lookup API

Pass a five-digit ZIP code or a two-letter state code to retrieve applicable tax rates. Querying a state returns its base tax rate, while a ZIP code returns the estimated combined rate. Paid plans add granular rate breakdowns covering county, city, and special district jurisdictions.

What people use it for

Online Store Checkout: When a customer enters their shipping ZIP code, e-commerce checkouts apply the matching combined rate to calculate cart totals.
Automated Invoice Generation: B2B billing platforms look up state tax rates to append accurate tax line items to monthly customer invoices.
Point of Sale Calculation: Retail POS systems query store location ZIP codes during setup to store local tax percentages for offline transactions.
Subscription Billing Quotes: SaaS quote generators calculate estimated local taxes before sending multi-state sales proposals to prospective corporate clients.

Ways to call it

One endpoint, many ways in — REST with JSON, XML, YAML and CSV, plus GraphQL and an MCP interface for AI agents.

JSON: Default REST response
XML: Markup format
YAML: Human-readable
CSV: Tabular export
GraphQL: Query language
MCP: For AI agents

View all integrations →

Other ways to use Sales Tax Lookup

Same data, same APIVerve account, same credit balance — one key works on all of them.

Give it to an AI agentConnect over MCP and your agent calls it as a native tool — Claude, Cursor, ChatGPT.on VerveKit Google Sheets or ExcelA =VERVE() formula fills a column — no script, no export, recalculates in place.on VerveSheets Ground an agent on itA cited, machine-checkable fact your model can't produce on its own.on VerveContext

Questions.

Common questions about the Sales Tax Lookup API.

Read the docs →

Does this cover sales tax across the entire United States?

Yes, it covers tax jurisdictions across the US. You can look up rates statewide using two-letter state codes or drill down to local areas using standard US ZIP codes.

Can I query a state sales tax rate without providing a ZIP code?

Yes. The state lookup endpoint takes a two-letter state abbreviation and returns the statewide tax rate. You only need a ZIP code when you want combined local rates.

Are city, county, and special district rates included on the Free plan?

No, the Free plan only returns the combined rate and state code. Jurisdiction breakdowns for county, city, special district rates, and region names are premium fields included on Starter and higher paid plans.

What would 50,000 sales tax lookups a month cost me?

A volume of 50,000 lookups requires 100,000 credits, which uses half of the Starter plan's 200,000 monthly credits. That works out to about $0.30 per 1,000 calls. If you only need light testing, the Free plan includes 100 lookups each month.

Can I calculate and display these tax rates in my commercial store?

Yes, commercial use is supported on any paid plan. You can calculate and display tax rates during checkout or invoicing, though you may not resell or redistribute the raw rate data.

Request parameters — GET /v1/salestax

Sent in the query string. Premium parameters are accepted on every plan but only take effect on plans that include them. Anything not listed here is dropped rather than passed through.

Required

Parameter	Type	Example	Description
`zip`Required	string	`64082`	The zip code for which you want to get the sales tax rate length 5-5

Example request

1
2

curl "https://api.apiverve.com/v1/salestax?zip=64082" \
  -H "x-api-key: YOUR_API_KEY"

Authentication

Send your key in the x-api-key header. That is the only auth step — no token exchange, and no per-endpoint scope to configure.

Header	When	Value
`x-api-key`Required	Every request	Your API key. Header names are case-insensitive, so `X-API-Key` is the same header.
`Authorization`Alternate	Instead of the above	`Bearer <key>` — for clients that only expose bearer auth. Resolves to the same account and the same billing.

401 is the only auth verdict

A 401 means the key is missing, invalid or expired. A 403 means the key is valid but not permitted here — blocked by a key restriction or an IP allow-list. Running out of credits is a 429.

Response — GET /v1/salestax

Every APIVerve endpoint returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape.

Sample response

{
  "status": "ok",
  "error": null,
  "data": {
    "state": "CA",
    "zip": 90210,
    "region": "WEST HOLLYWOOD TOURISM IMPROVEMENT DISTRICT",
    "rate": 0.1025,
    "county": 0.0025,
    "city": 0.0075,
    "special": 0.0325
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Field	Type	Example	Description
`state`	string	`"CA"`	Two-letter state code for the tax jurisdiction
`zip`	number	`90210`	ZIP code that was looked up
`region`Premium	string	`"WEST HOLLYWOOD TOURISM IMPROVEMENT DISTRICT"`	The geographic region or jurisdiction name for the tax rate
`rate`	number	`0.1025`	Estimated combined sales tax rate for the location
`county`Premium	number	`0.0025`	Estimated county tax rate
`city`Premium	number	`0.0075`	Estimated city tax rate
`special`Premium	number	`0.0325`	Estimated special district tax rate

Response headers

Every response carries your balance, so your own code always knows where it stands without polling anything. All four are exposed to browsers through CORS.

Header	What it carries
`x-api-remaining-credits`	Credits left in the current cycle
`x-api-credits-used`	Credits spent in the current cycle
`x-api-max-credits`	The allowance for the cycle
`x-api-version`	Version of the endpoint that answered

Errors

Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change.

Status	Meaning	What to do
`400`	Input was rejected	Read `error`; it names the parameter that has to change.
`401`	Key missing or invalid	Check the header name and the key value.
`403`	Key valid, but not permitted here	A key restriction or an IP allow-list — never a bad key.
`429`	Rate limited, or out of credits	Read `error` to tell them apart, then back off or top up.

What a call costs — 2 credits per call

Credits are shared across every APIVerve API — one balance, one key, one bill. Failed requests never count against it, so a rejected input costs nothing.

Plan	Per month	Credits	Sales Tax Lookup calls	Per 1,000 calls
Free	Free	200	100	Free
Starter	$29.99	200,000	100,000	$0.30
Pro	$99.99	1,000,000	500,000	$0.20
Mega	$299.99	4,000,000	2,000,000	$0.15

Calls are what the credits buy at this API's rate — spend them here, on any of the other APIs, or across both. Nothing is reserved per endpoint.

Compare all pricing tiers →

Call it from cURL — GET /v1/salestax

No SDK to install — this is a plain HTTPS call to /v1/salestax with your key in the x-api-key header. Swap in a real key and it runs as-is.

cURL

1
2

curl "https://api.apiverve.com/v1/salestax" \
  -H "x-api-key: YOUR_API_KEY"

Resources

GitHubapiverve/salestax-apiSource, issues and the examples this page is built from.ReferenceSales Tax Lookup API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

@apiverve/salestaxnpm APIVerve.API.SalesTaxLookupNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Node.js — GET /v1/salestax

Install the Node.js SDK, then call the Sales Tax Lookup API with your key. The client wraps the same HTTPS request, so anything it returns is what the endpoint returns.

Install — npm

npm install @apiverve/salestax

Node.js

const res = await fetch("https://api.apiverve.com/v1/salestax", {
  headers: { "x-api-key": "YOUR_API_KEY" },
});
const { data } = await res.json();
console.log(data);

Resources

npm@apiverve/salestaxThe published Node.js client, versioned and signed.GitHubapiverve/salestax-apiSource, issues and the examples this page is built from.ReferenceSales Tax Lookup API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

APIVerve.API.SalesTaxLookupNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Python — GET /v1/salestax

No SDK to install — this is a plain HTTPS call to /v1/salestax with your key in the x-api-key header. Swap in a real key and it runs as-is.

Python

import requests

res = requests.get(
    "https://api.apiverve.com/v1/salestax",
    headers={"x-api-key": "YOUR_API_KEY"},
)
print(res.json()["data"])

Resources

Also published for

@apiverve/salestaxnpm APIVerve.API.SalesTaxLookupNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from C# / .NET — GET /v1/salestax

Install the C# / .NET SDK, then call the Sales Tax Lookup API with your key. The client wraps the same HTTPS request, so anything it returns is what the endpoint returns.

Install — NuGet

dotnet add package APIVerve.API.SalesTaxLookup

C# / .NET

using var client = new HttpClient();
client.DefaultRequestHeaders.Add("x-api-key", "YOUR_API_KEY");

var json = await client.GetStringAsync("https://api.apiverve.com/v1/salestax");
Console.WriteLine(json);

Resources

NuGetAPIVerve.API.SalesTaxLookupThe published C# / .NET client, versioned and signed.GitHubapiverve/salestax-apiSource, issues and the examples this page is built from.ReferenceSales Tax Lookup API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

@apiverve/salestaxnpm

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Go — GET /v1/salestax

No SDK to install — this is a plain HTTPS call to /v1/salestax with your key in the x-api-key header. Swap in a real key and it runs as-is.

req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/salestax", nil)
req.Header.Set("x-api-key", "YOUR_API_KEY")

res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))

Resources

Also published for

@apiverve/salestaxnpm APIVerve.API.SalesTaxLookupNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from PHP — GET /v1/salestax

No SDK to install — this is a plain HTTPS call to /v1/salestax with your key in the x-api-key header. Swap in a real key and it runs as-is.

PHP

$ch = curl_init("https://api.apiverve.com/v1/salestax");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-api-key: YOUR_API_KEY"]);

$response = curl_exec($ch);
echo $response;

Resources

Also published for

@apiverve/salestaxnpm APIVerve.API.SalesTaxLookupNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Call it from Ruby — GET /v1/salestax

No SDK to install — this is a plain HTTPS call to /v1/salestax with your key in the x-api-key header. Swap in a real key and it runs as-is.

Ruby

require "net/http"

uri = URI("https://api.apiverve.com/v1/salestax")
req = Net::HTTP::Get.new(uri)
req["x-api-key"] = "YOUR_API_KEY"

res = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) { |h| h.request(req) }
puts res.body

Resources

Also published for

@apiverve/salestaxnpm APIVerve.API.SalesTaxLookupNuGet

Only the languages APIVerve ships a client for are listed — the rest call the endpoint directly over HTTPS.

Finance

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Sales Tax Lookup API

Try it — live request, no key required

About the Sales Tax Lookup API

What people use it for

Ways to call it

Other ways to use Sales Tax Lookup

Questions.

Request parameters — GET /v1/salestax

Required

Authentication

Response — GET /v1/salestax

Response fields

Response headers

Errors

What a call costs — 2 credits per call

Call it from cURL — GET /v1/salestax

Resources

Also published for

Call it from Node.js — GET /v1/salestax

Resources

Also published for

Call it from Python — GET /v1/salestax

Resources

Also published for

Call it from C# / .NET — GET /v1/salestax

Resources

Also published for

Call it from Go — GET /v1/salestax

Resources

Also published for

Call it from PHP — GET /v1/salestax

Resources

Also published for

Call it from Ruby — GET /v1/salestax

Resources

Also published for

Zero-code embed — one snippet, no backend

Changelog — Sales Tax Lookup API

Finance

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