Address Correction API

Our address correction service ensures successful deliveries to recipients by correcting postal addresses without error while saving businesses money.

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Trusted USPS Address Verification API

Esendex's USPS address verification tool is trusted by some of the biggest brands in the world.

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USPS Address Verification API Features

When you combine our USPS address verification service with these excellent features, anything is possible!

Our address verification API delivers the tools you need to efficiently deliver mail directly to recipients without issues and seamlessly build powerful address verification applications.

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Address Standardization

Automatically update addresses to adhere to the United States Postal Service's (USPS) standards. This ensures successful deliveries.

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Address Correction

Automatically correct shipping addresses before packages are sent to recipients to save money & stop undeliverable mail.

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Address Validation

Compare each customer address with the USPS database & find a match. If a match is found, then that address is deliverable.

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Residential Delivery Indicator

USPS RDI, or Residential Delivery Indicator, identifies whether a U.S. address is classified as residential or business.

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Proper Case Formatting

Get data in Proper Case format rather than the default uppercase format for automatic scanning of bar codes.

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Carrier Route

Carrier route codes can be presorted to the carrier route level to take advantage of presorting postage discounts.

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Ensure correct primary & secondary data to give mailers the ability to sort their mailings in approximate carrier-casing sequence.

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Geolocation Data

U.S. addresses can yield latitude & longitude, area code, time zone, & daylight savings information as an optional return.

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Legislative Data

Return legislative information, including the congressional district number along with the senate & house district of the address.


1. World Class Support

Most address correction services don't have active online support channels customers can speak to when they need it the most, and we understand.

That's why we have 24/7, around the clock emergency support for our address correction services. Expect fast response times, fast troubleshooting, and email, chat, and phone support.

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2. US Postal Address Correction

Our USPS address correction API enables you to leverage your business in the United States and Canada without any interruptions. Don't worry about the distance! Get correct postal addresses in both countries.

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3. Government Level Security

Our API for address correction USPS is 256 Bit Encrypted (typically only reserved for governments and militaries), SOC2 Type 2 Certified, HITRUST Certified.

Hardware-based correction servers are strategically located in the US, owned and operated by Esendex.

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How Address Correction APIs Works

A few different types of address correction APIs are available, but they all work to clean up and correct addresses entered by users. This is important because it helps ensure that parcels or letters arrive at their intended destination, and it can also help businesses save money on postage.

The USPS Address Correction API (PAV API) can correct an address, verify an address, or standardize an address. One common type of address correction API is the USPS Address Correction API. Esendex offers this service, which can be used to correct the United States and Canadian mail addresses.

ROI, Cost, & Data Management

Businesses can ensure that their customer data is accurate and up-to-date by using an address correction API. This can lead to increased sales and improved customer retention rates.

Additionally, address correction APIs can help businesses save on shipping costs by reducing the number of undeliverable packages. Finally, address correction APIs can help businesses manage their data more effectively by providing a single source of truth for customer addresses.

Programmable Address Correction

Our USPS address correction API integrates with your website, database, or system using SOAP (Simple Object Access Protocol) or REST (Representational State Transfer) protocols.

Unlimited Address Correction Plan

We offer an affordable, unlimited USPS address correction plan that won't limit you by usage and transactions while at the same time saving your business money.

What Does Our Address Correction API Do?

We help you save time, money, and resources by correcting addresses for deliverability before mail and packages are sent out. PAV API helps businesses ensure data quality for all U.S. customers.

Keep in Mind…

Address correction greatly increases delivery time and the likelihood of a successful delivery. However, correction alone does not guarantee deliverability or validity, which is why our PAV API also includes address verification and address standardization.

  • Corrects spelling errors
  • Formats with USPS capitalization
  • Fixes incorrect abbreviations
  • Formats ZIP Codes to ZIP+4
  • Identifies missing information

Examples of Address Correction

Based on the examples below, you can see our address correction API can fix incorrect abbreviations as well as format zip code to zip +4 and so much more.

Fixes Incorrect Abbreviations

An example of a peice of mail thats been corrected
An example of a peice of mail thats been corrected

Formats to ZIP+4

An example of a peice of mail thats been corrected
An example of a peice of mail thats been corrected

USPS Address Correction Pricing

Pick the plan that works best for you.

No hidden fees and no long-term commitment required. Best in industry pricing with either our unlimited or per transaction pricing.

We will not be undersold*. With Esendex you get the most accurate and advanced Postal Address correction API at the absolute best pricing anywhere.

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Some restrictions apply, contact sales for details.

All Plans Include

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Simple USPS Address Correction Documentation

We know that implementing an address correction API into your business takes time. That's why we made our documentation easy to understand and implement into all of your projects!

You'll have no problem connecting with the address correction service using any programming language capable of REST or SOAP calls, as it was created by developers who wanted nothing more than making sure you could get up and running quickly without having trouble understanding what is happening or how things work underneath the hood.

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  • Uncomplicated API References
  • Code in Multiple Programming Languages
  • Technical Customer Support
  • Helpful FAQ Section for Dev
Address Correction Docs

The Esendex Difference

Since the early 2000s, Esendex has been one of the industry's most trusted address correction providers. The truth is we do things differently.

Our vision is to shape your connections to the world through reliable, usable, and adaptable Communication and Data APIs.

24/7 Support

Lowest Pricing

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Michael K.

President, Program Development, 1-10 employees
Used the API for: 30+ years

"We have used PAV API for over 30 years. Since switching to Esendex we have noticed increased accuracy at a fraction of the cost of other available services. I haven't found anything we don't like about PAV API."

We've been rated 5 out 5 stars on Capterra and GetApp.

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Benefits of Using an Address Correction API

Besides making sure your mail gets where it's supposed to go, there are many benefits to using an address correction service like our PAV API.

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Return On Investment

Reach customers the first time and improve the results of your mail campaigns. Easily increase your companies ROI.

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Decrease Costs

Stop wasting money on undeliverable mail and postal returns, and qualify for bulk discounts that save yourself money.

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Lightning-Fast Speed

Get bulk USPS address correction results in just a fraction of a second with our programmable address API.

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Data Management

Correction address data and ensure customer information is up-to-date and accurate on a consistent basis.

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Great Protection

Reduce fraud by identifying invalid or fake addresses before sending mail and packages to your customers.

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Amazing Coverage

Get address correction coverage for addresses in all U.S. territories, the United States, and even Canada.

When To Use Address Standardization API

Address correction services are used in just about every industry. From global corporations to local nonprofits, almost every organization sends mail. To make sure your mail is delivered to the correct address in a timely manner, use an address standardization service.

Address Correction Is Perfect For Every Industry

Debt Collection

Send debt validation notices, DNC confirmations, and more.


Make sure medical bills and test results reach the correct patient.


Reward loyal customers with exclusive discounts and offers.


Mail timely reminders about license renewals and state inspections.

Correct Addresses For:

  • Mailing Campaigns
  • License Renewals
  • Customer Rewards
  • Donation Drives
  • Exclusive Discounts
  • Loyalty Programs
  • Rebate Offers
  • Financial Information
  • Legal Documents
  • Membership Renewals
  • Paper Billing
  • Company Newsletters
  • Political Messages

How To Get Address Correction For Your Business

Send your mail to the correct address every time with an address correction software. Esendex's CASS Certified™ PAV API maximizes address quality without sacrificing speed or accuracy.

To be USPS CASS Certified™, an API must be evaluated on and a achieve a certain level of accuracy in the following areas:

Your business benefits from having a verified and corrected contact database. You’ll also receive discounts in shipping, bulk mailing, and more.

Common Address Correction API Use Cases

USPS address correction can be used in so many ways to correct your customers address effectively. Here are a few ideas you could implement into your business to decrease undeliverable mail, save money, and cleanse your database.

Establish your online store ensuring products get delivered to customers.

Ensure shipments from warehouses arrive on time to their correct destinations.

Verify personal information to run credit and save money by verifying backgrounds.

Cleanse and verify raw incoming address data from anywhere by parsing it.
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USPS Address Correction API FAQ's

Get your United States and Canadian USPS address standardization API questions answered here.

1. What is address correction service?

An address correction service helps to ensure that your mail is delivered to the correct address. This can be especially important if you've moved recently or have a new business location. The service can also help to make sure that your mail is correctly formatted and that all the required information is included.

2. How does address correction work?

Address correction is updating an address to ensure that it is accurate and deliverable. This can be done manually or through an automated system. An address correction API allows businesses to automate the address correction process by integrating it into their existing systems. Esendex offers an address correction API that can be used to update addresses in the United States and Canada.

3. How to request address correction?

You can request to use Esendex's address correction API by contacting our helpful sales team and creating an account. The process is fast and straightforward.

4. How to see if you have an address correction on file with USPS?

If you're not sure if you have an address correction on file with the United States Postal Service (USPS), you can check in a few ways. One way is to look up your address using the USPS Address Lookup service. This service will show you whether or not your address is currently in their system and if any changes need to be made. Another way to check is to sign up for Esendex's USPS Address Correction API. This API will allow you to check for address corrections and make changes as needed automatically. If you have any questions about whether or not you have an address correction on file with USPS, you can always contact one of our helpful sales representatives to get access to our API.

5. What is the cost for address correction?

Please contact our helpful sales team about pricing and unlimited address correction plan. Overall, our team can help find the best pricing package that fits your business.

Explore Our Address Correction API Blog Topics

The Esendex blog has the latest content for all of your USPS address correction needs.

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