Worldwide Data Coverage
210+ Countries
10k+ Happy Users
300 Free Requests / month
Lightning Fast
Easy-to-use REST API
Easy Integrations
Frequent Updates
Custom Plans
Priority Support
Zuverlässig & Sicher

Zip Code API - Free Postal Code Search & Validation

A completely free Zip Code REST API and the best way to get accurate zip code data for your application.

VAT lookup and validation API
Accounts
>10 thousand
App Rating
4.5
Europe Flag
Europe-based
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Über 10.000 Unternehmen schenken uns bereits ihr vertrauen

Access The API In Just Three Easy Steps

Zip codes are handled differently in almost every country. We provide an efficient data layer to help you validate and normalize zip codes.

Make Request
Step 1

Get Your API Key

With a few clicks, register your new API key. We provide a generous free tier to get you started and cover basic use cases.

Make Request
Step 2

Make A Request

Our API suite provides you with plenty of useful documentation and use case examples to provide you with the best possible experience.

Receive Data
Step 3

Receive Postal Code Data

Receive postal code data in real-time through our Zip code REST-API. All of our data are updated regularly.

Available Data Endpoints

Oour zip code API provides multiple endpoints to allow global searches and postal code related calculations. 

GET /api/v1/search
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// search for zip codes 
curl -X GET \
    --url "https://api.zipcodestack.com/v1/search?codes=20095&country=de" \
    --header "apikey: YOUR-APIKEY"

Search postal codes

Search for postal codes globally or for a specific country.

Documentation 
GET /api/v1/distance
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// calculate distance between two zip codes 
curl -X GET \
    --url "https://api.zipcodestack.com/v1/distance?code=99501&compare=90210" \
    --header "apikey: YOUR-APIKEY"

Distance calculation

Calculates the distance between one and other postalcodes.

Documentation

"We had a few special requirements, and the zipcodestack.com team was super responsive & helpful, as they replied to all our questions and helped us get started within just a few hours. With the help of their ZIP code API, we can now easily handle our global address validation and shipping calculations."

Armin Daryabegi CTO
Worldwide Data Coverage
210+ Countries
10k+ Happy Users
300 Free Requests / month
Lightning Fast
Easy-to-use REST API
Easy Integrations
Frequent Updates
Custom Plans
Priority Support
zipcodestack

Frequently Asked Questions

Everything You Need to Know – Answers to Your Most Common Questions

The Zip Code API provides real-time validation and information about postal codes for various global locations. It helps businesses verify addresses, ensure accurate shipping, and gather location data.

Have More Questions? Feel Free To Contact Us!

4.9 Out Of 5 Based On 86 Reviews

Start Using Our ZIP Code API For Free Today!

The Perfect Tool To Handle Your Address Validation Needs. Our API Helps You With Current And Accurate Postal Code Data. Stop Worrying About Uptime & Outdated Data.

database

Global Coverage

Security

Bank-Level Security

Support

Premium Support

Fast Response

Fast Response Times

Get Started - It's Free! Read Documentation

No Credit Card Required | Instant Access

Used & Loved By The Leading
Companies Of The World

Perfect for E-commerce Checkout

The zipcode validation API has been a game-changer for our e-comm platform. Dramatically reduced shipping errors & improved our checkout completion rate by 12% in just one month.

Michael Chen, CTO

Reliable and Incredibly Fast

We've integrated zipcodestack.com into our logistics platform and have been impressed by the reliability and speed. Response times under 100ms and the accuracy is spot on.

Sarah Johnson, Lead Developer

Cost-Effective Scaling

As our user base grew from thousands to millions, zipcodestack.com scaled perfectly. Their pay-as-you-go pricing saved us thousands compared to competitors, with no compromise on performance.

Marcus Bennett, Product Director