Zip Codes Lookup API

GET

Find every ZIP code in a city or map a code to its location.

Zip Codes Lookup finds all postal codes within a US city or resolves a five-digit ZIP code to its city and state. Paid plans add geographic coordinates.

Try it — live request, no key required

Request

GETapi.apiverve.com/v1/zipcodes?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": {
    "zipcode": "64082",
    "state_abbr": "MO",
    "latitude": "38.850243",
    "longitude": "-94.39570",
    "city": "Lees Summit",
    "state": "Missouri"
  }
}

About the Zip Codes Lookup API

Zip Codes Lookup works by querying a large database of zip codes to retrieve the zip codes of a city. It returns the zip codes in a structured format.

What people use it for

Checkout Address Autofill: Fill in city and state names automatically when an online shopper types their five-digit postal code during checkout.
Delivery Zone Assignment: Dispatch software queries a target city and state to collect every valid postal code before assigning regional courier routes.
Territory Sales Mapping: When sorting sales leads, CRM systems look up postal codes to group prospects under the correct state and municipal account reps.
Shipping Address Verification: To prevent delivery exceptions, order management systems check customer-entered postal codes against returned state codes before processing fulfillment.

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 Zip Codes 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 Zip Codes Lookup API.

Read the docs →

Can I search in reverse from a city to find its ZIP codes?

Yes. You can look up a single ZIP code to retrieve its city and state, or submit a city and state pair to get every ZIP code associated with that municipality.

How fresh and extensive is the ZIP code database?

The database covers more than 40,000 ZIP codes across the United States and is updated monthly.

How far does the Starter plan go for ZIP code lookups?

The Starter plan covers 100,000 lookups per month. Each request uses 2 credits, which works out to about $0.30 per 1,000 calls. The Free plan includes 100 calls each month for development and testing.

Are latitude and longitude coordinates included on the Free plan?

No. Latitude and longitude are premium fields that require a paid subscription. The Free plan provides city, state, state abbreviation, and ZIP code, while any paid plan unlocks the exact geographic coordinates.

What does the response return when a city contains multiple ZIP codes?

When searching by city and state, the response returns a list containing every ZIP code registered to that location, each with its corresponding state on every plan and coordinate data on paid plans.

Can I use the returned location data inside a commercial application?

Yes, commercial use is supported on all paid plans. You may use the retrieved location and ZIP code data inside your own services, provided you do not resell or redistribute the raw dataset.

Request parameters — GET /v1/zipcodes

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 data length 5-5

Example request

1
2

curl "https://api.apiverve.com/v1/zipcodes?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/zipcodes

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": {
    "zipcode": "64082",
    "state_abbr": "MO",
    "latitude": "38.850243",
    "longitude": "-94.39570",
    "city": "Lees Summit",
    "state": "Missouri"
  }
}

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
`zipcode`	string	`"64082"`	The ZIP code for the requested location
`state_abbr`	string	`"MO"`	Two-letter state abbreviation code
`latitude`Premium	string	`"38.850243"`	Geographic latitude coordinate of the location
`longitude`Premium	string	`"-94.39570"`	Geographic longitude coordinate of the location
`city`	string	`"Lees Summit"`	City name associated with the ZIP code
`state`	string	`"Missouri"`	Full state name corresponding to the abbreviation

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	Zip Codes 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/zipcodes

No SDK to install — this is a plain HTTPS call to /v1/zipcodes 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/zipcodes" \
  -H "x-api-key: YOUR_API_KEY"

Resources

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

Also published for

@apiverve/zipcodesnpm apiverve-zipcodesPyPI APIVerve.API.ZipCodesLookupNuGet

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/zipcodes

Install the Node.js SDK, then call the Zip Codes 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/zipcodes

Node.js

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

Resources

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

Also published for

apiverve-zipcodesPyPI APIVerve.API.ZipCodesLookupNuGet

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

Call it from Python — GET /v1/zipcodes

Install the Python SDK, then call the Zip Codes Lookup API with your key. The client wraps the same HTTPS request, so anything it returns is what the endpoint returns.

Install — PyPI

pip install apiverve-zipcodes

Python

import requests

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

Resources

PyPIapiverve-zipcodesThe published Python client, versioned and signed.GitHubapiverve/zipcodes-apiSource, issues and the examples this page is built from.ReferenceZip Codes Lookup API docsEvery parameter, every response field, and the errors.ParametersWhat this call acceptsRequired and optional inputs, with example values.

Also published for

@apiverve/zipcodesnpm APIVerve.API.ZipCodesLookupNuGet

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/zipcodes

Install the C# / .NET SDK, then call the Zip Codes 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.ZipCodesLookup

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/zipcodes");
Console.WriteLine(json);

Resources

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

Also published for

@apiverve/zipcodesnpm apiverve-zipcodesPyPI

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

Call it from Go — GET /v1/zipcodes

No SDK to install — this is a plain HTTPS call to /v1/zipcodes 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/zipcodes", 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/zipcodesnpm apiverve-zipcodesPyPI APIVerve.API.ZipCodesLookupNuGet

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

Call it from PHP — GET /v1/zipcodes

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

PHP

$ch = curl_init("https://api.apiverve.com/v1/zipcodes");
curl_setopt($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/zipcodesnpm apiverve-zipcodesPyPI APIVerve.API.ZipCodesLookupNuGet

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

Call it from Ruby — GET /v1/zipcodes

No SDK to install — this is a plain HTTPS call to /v1/zipcodes 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/zipcodes")
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/zipcodesnpm apiverve-zipcodesPyPI APIVerve.API.ZipCodesLookupNuGet

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

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Zip Codes Lookup API

Try it — live request, no key required

About the Zip Codes Lookup API

What people use it for

Ways to call it

Other ways to use Zip Codes Lookup

Questions.

Request parameters — GET /v1/zipcodes

Required

Authentication

Response — GET /v1/zipcodes

Response fields

Response headers

Errors

What a call costs — 2 credits per call

Call it from cURL — GET /v1/zipcodes

Resources

Also published for

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

Resources

Also published for

Call it from Python — GET /v1/zipcodes

Resources

Also published for

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

Resources

Also published for

Call it from Go — GET /v1/zipcodes

Resources

Also published for

Call it from PHP — GET /v1/zipcodes

Resources

Also published for

Call it from Ruby — GET /v1/zipcodes

Resources

Also published for

Zero-code embed — one snippet, no backend

Changelog — Zip Codes Lookup API

Geography

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