Address Verification

Address Verification & Validation API

By 31 March 2024May 2nd, 2024No Comments
international address verification and validation api

Address Verification API & Address Validation (245+ Countries)

Capture the right address every time. 245+ Countries Covered. Get Accurate Global Address Data Everytime.


output Address result

3075 14th Ave. #212, Markham,
ON, L3R 5M1, Canada

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Highest Accuracy and Best Address Verification API & Address Validation API Tool

Verify, validate, standardize, auto-complete, and cleanse your address list with PostGrid’s CASS & SERP-certified address validation API in real-time. Use our Standard API to Verify US & Canada Addresses. Use our Global/International Address Verification API to verify, validate, standardize, auto-complete, and cleanse addresses in real-time across 245+ countries and territories worldwide.

address verification and validation api

Why is Address Verification and Validation Important?

Companies invest the highest amount of money in launching direct mail marketing campaigns. Apart from that, most businesses, including financial institutes, real estate businesses, etc., send direct mail pieces regularly.

Businesses put a large amount of money, time, and resources into creating, designing, printing, and shipping direct mail. Once your mail pieces are delivered, they analyze the results based on the response and conversion rates.

Being one of those business owners, you should note that many of the mailpieces you send aren’t reaching the intended recipient.

The direct mail results you’ve analyzed until now can be inaccurate if you don’t regularly clean your database and eliminate the wrong addresses. Based on the outcomes, all money, and resources used in creating, printing, and mailing the direct mails that never reached their recipient have gone in vain.

Hence, to avoid such things from happening to you, consider getting a CASS USPS-certified address verification API. This type of API usually helps you clean and validate your mailing list by matching the details with the official USPS database (USPS address verification). With the right address details of your recipient in your system, you can decrease the misspending and lost opportunities and get more accurate analytical reports.

Let’s determine how your business can benefit from an address verification or validation API.

What is an Address Verification or Validation API?

An address verification service API helps you verify, validate, standardize, parse, geocode and provide a lot of other metadata related to an address adhering to local postal standards.

enterprise security

An address validation API is a service that lets you access the authoritative USPS database which has 160 million postal delivery points and 41,704 ZIP codes. It processes your mailing addresses to determine whether they refer to real places. Otherwise, it lets you spot the incorrect components, which you may ask your customers to modify.

Technically, the address validation API is an application programming interface, or API, that validates all postal information automatically. So it identifies address elements, standardizes your delivery locations for shipping, and replaces incorrect data with correct details. Also, it finds the accurate latitudes and longitudes for the addresses via geocoding.

You can integrate an address API with databases, websites, CRMs, online platforms, and software programs and enrich your mailing list quality.

PostGrid’s API is CASS (Coding Accuracy Support System) certified, helping us build on USPS’s official address data to provide standardization, validation, geocoding, and autocomplete at lightning speed. You can use it to reduce delivery delays and enhance deliverability predictability to improve your customer experience. US address validation APIs normalize addresses to match the standards of the USPS.

PostGrid’s address validation API plays an important role in ensuring the addresses entered are cleansed, accurate, and standardized according to local postal standards for higher accuracy and clean address data for your records.

In many instances, a user is bound to have errors while entering an address on your website or uploading a list with multiple addresses such as missing suite number, wrong postal address, or other types which can cause a lot of confusion, and wasted hours, and resources. An address verification software can eliminate this hassle and have clean addresses that save time and money.

Our address verification software allows you to verify, validate, or standardize addresses in real-time at the point of entry or allows you to verify in bulk allowing you to verify up to 200,000 addresses at once.

Our address validation API integrates with your enterprise system or CRM (primarily your website) to fetch the data and match it with your provided country’s postal address verification web service. Using this, you can ensure you have clean data right at the point of entry, reducing the bounce rate of your mail.

See Our Address Verification API & Tool in Action

Why Do You Need an Address Validation API

An API for address verification can help your companies in a lot of ways and double your returns. Some of them are mentioned below:

Saves Time

Once you merge PostGrid with your CRM or other systems, the address verification API works automatically depending on the instructions you have set. From letting only correct and accurate data enter your system to cleaning and updating the customer details, PostGrid does it all automatically.

This way, you get to save a lot of time that you might have otherwise spent collecting and matching the data with the official database manually.

Enhance Your Conversion Rate

The faster your customer reaches the call to action, the better your conversion rate will be. The address validation API provides the address suggestions as your customers start typing their addresses.

It lets your customers and prospects fill in their details at a better speed and take them to the final CTA more quickly.

Plus, it also ensures that they only enter the correct address. For example, as an individual starts typing their address details, PostGrid will recommend several addresses depending on the area and zip code they’ve entered. It’ll force them to choose one of the suggested addresses.

If they fail to do so and the API doesn’t recognize the address they have typed, they’ll have to change it and choose the correct address. This way, you can guarantee the order’s shipping and delivery to the right address on time.


Over the years, things have changed vastly, and technology has advanced way too much. Similarly, no company in the business of sending regular direct mails would be willing to do it the traditional way.

The old ways are not only time-consuming but cost a lot too. With an automated address validation API in place, you can eliminate all such methods and the money you’d otherwise spend operating in those ways.

The address validate API stores the instructions given to it and manages the tasks quickly and accurately. This way, you save money from the beginning of the tasks. However, for some reason, if your customer returns the parcel and you need to send a different package to the same address, you can do it with a few clicks without entering every detail again.

Improve User-Experience

When your customers or potential customers visit your store, they judge it by the interior of walls, furniture, staff, and of course, the quality of your products.

Similarly, when someone visits your website, they check out how it represents your brand, how easy it is to find things there, and the user-friendly features you have displayed.

A good company will always try to make their user’s journey a cakewalk on their website. Hence, you must use such features that enhance the user experience and enable them to place an order quickly.

The API for address validation can help you do it just by its integration with your CRM.

High-Quality Data

The address verification API, like PostGrid, offers you at least three features: address parsing, standardization, and validation. By parsing and standardizing the data present in your mailing list, API makes sure that the data is available in the right format. By validation, it ensures that the addresses are correct as per USPS guidelines.

Plus, the USPS address validation API web service keeps on updating with the new location details. Hence, PostGrid keeps on updating your mailing list accordingly. Besides that, as you grow, new addresses keep on filling your mailing list. With entry-point verification, PostGrid makes sure that only the correct data enters your system.

This way, the data in your mailing list is always of high quality.

International Supplies

When you’re in a business where you have to send parcels, packages, and direct mail pieces overseas, nothing changes for shipping it to the correct address except for fear of damage.

When you send something locally or even within the same nation, you have a thorough knowledge of the addresses’ format and other details.

However, it’s not the same for the international addresses. Every country has its laws, making it difficult for you to follow up.

PostGrid has databases of over 150 countries, allowing you to ship to the right address confidently without fearing the loss you might have to face on the loss of your direct mail pieces.

Plus, just like you can automate the shipping of your direct mail pieces in the US, you can also automate them overseas.

How Does Address Validation API Work?

automate integrate with sales crm

After studying the benefits of address API, you can determine how much loss the lack of a proper verification API can do to your business.

By sending your mailpieces to the wrong addresses, you can hurt your chances of increasing sales, deepening bonds with your customers, and nurturing or delighting your current clients. Apart from that, you also lose the money, resources, and time you put into it.

Manually standardizing and validating the addresses can be time-consuming and tiresome. Being tedious tasks, they can let you slip on a few errors, like typing, spelling, or formatting mistakes. That may affect your brand’s reputation considerably.

Hence, you must clean the data of your mailing list regularly and keep a check on the wrong information from entering your system. You can solve all of such problems with a single PostGrid API.

Moving forward, we’ll discuss how you can easily and effectively use one such API to drop the time, money, and resources you put into a direct mail service campaign and get better returns.

Address verification API works by integrating with your system to check and correct all the address data. It can also instantly verify any address that you have entered and provide you with a whole lot of other metadata such as Latitude/Longitude, Geo-coordinates, RDI, ZIP+4, and many more.

Our API is both CASS (USPS) and SERP (Canada Post) certified which ensures all addresses are cleansed, verified, and standardized to local postal standards.

Our address validate API can be integrated in the following way

  • Create an account with PostGrid – Enter the required details and get your account ready in just a few minutes. The set-up is very self-explanatory and quick.
  • Login – Login into your account with your unique user ID and password. A go-to dashboard will be made accessible to you, which will contain everything that you need to use the API.
  • Use the API keys – Your test and live API keys will be available for you through the settings menu. You will have to copy the keys from here. It is recommended that you use these keys only on trusted servers to ensure maximum security.
  • Paste the keys – The next step will be to paste the URL of our validation API to your website’s address form, where you want the addresses to be verified.
  • Start API calls – Once you paste the URL, you will receive successful API calls on request. You can even customize it according to you. If you get stuck at any stage or the API is not responding in the way you need, feel free to contact us, and we will help you out instantly.

Here are the steps of how PostGrid Address Validation API works:

send certified mail letters

  • To get started with PostGrid’s address validation service API, you’d need to integrate it with your CRM, website, or other systems.
  • Once integrated, it’ll fetch all of the customers’ details present in your database.
  • After collecting the data, it’ll parse each of the customer records present in your mailing list. By parsing, it means breaking down the different components of an address to make it clearer.
  • Next to data parsing, it’ll standardize all of the records. It means changing the formatting according to the guidelines of USPS.
  • Once all of the separate customer addresses are in the right format and are CASS certified, the API will validate each of the entries with USPS’s official database.
  • Besides, it lets only accurate and valid addresses enter your system once integrated. Thus, keeping the quality of your mailing list high and keeping the spam away from your system.
  • For entry-point data cleaning, the API suggests valid addresses to the prospects as they start typing in the empty field. Gradually, as they continue to type, the recommendations get better and more exact. Now at the end, they can select the right suggestion and save it.
  • If the prospect fails to select one of the suggested addresses, the address correction API will not let them move to the next step, and they will need to locate the error they’re making and fix it. This step ensures that only correct data enters your system.

You can also do it manually by following these steps:

  • Collect all the entries of customers from your system’s data that you want to validate
  • Go through each record one by one, keeping the USPS guidelines in mind
  • And parse, standardize, and validate your data

It might seem like a simple process, but it can be challenging to manage and verify tens of thousands of customer addresses without making any mistakes. Plus, it’ll eat up tons of your hours, resources, and money, and yet, it’s not clear whether your database will be error-free at the end or not.

An automated address validation API can improve your address data-cleaning process tenfold and save you a tremendous amount of time. Plus, all your direct mail pieces reach the right recipient, reducing your misspending cost.

Why PostGrid Address Verification API is the Best Choice For You

You might be thinking, that tons of street address validations are available in the market. Why on earth do I choose PostGrid? Well, your question is valid and fair, which is why we’ll discuss several features, PostGrid offers that can change your life. Let’s find out what they are.

Global Address Data Verification

PostGrid global address API solves the problem that every postal address verification web service provider faces, the difference in language, script, and alignment of information. We have a postal database of nearly 245+ different countries. You can use our international address verification to verify addresses globally.

With PostGrid, you can translate each of the addresses that your customers provide, and get them parsed, standardized, and validated within minimal time. This way, you can ensure the right mail delivery, on time even across borders.


PostGrid’s Address Validation also returns reverse geocoding data like latitude and longitude coordinates with its geocoding API. It helps collect the accurate address details and ship the order to the right area without any confusion. If you integrate PostGrid with your CRM, you can quickly get your prospects’ complete information without them even typing it in. This feature also helps them reach the CTA more speedily and place their order.

Address Autocomplete, Parsing, and Standardizing

Address Autocomplete is, of course, the major feature of the PostGrid API. It fetches the entire data from your system within minimal time to parse, standardize, and validate it within milliseconds per record using autocomplete API.

Data Improvement

Along with identifying the correct, valid, and incorrect addresses, wouldn’t it be helpful if you could also manage to determine the “not yet built” area details?

PostGrid helps you know each one of them. So you can segment your audiences and ship your direct mail pieces only to the deliverable addresses, where someone is receiving them. In other words, the address exists in real-time.

Excellent Customer Support

With PostGrid, you can leverage customer services 24×7. Although the API is super simple to use — integrate it with your system, get the live API keys, and get started. Yet, if you face any difficulty getting your API keys or any other problem, you can contact us. We’ll provide a solution to your query within one business day.

Data Safety and Security

Privacy is the primary concern at PostGrid, which is why we have a direct partnership with HIPAA, PIPEDA, SOC-1, and SOC-2 compliant vendors. We guarantee the safety and security of your and your customer's data. This way, you can make decisions undoubtedly.

Scalable Processes

One of the biggest mistakes that companies make is to validate their data once and think it’s good to go for ages to come. With the growing business, grows your mailing list, and you’d need to parse, standardize, and validate the new addresses by scaling the process.

Plus, the data keeps on changing, which is why you’d also need to keep updating it in line with the official database of USPS. Hence, PostGrid provides a scaling feature, where you can verify as many addresses as you want and at any time.

System and Zapier Integrations

The major reason behind integration is the smooth user interface so you can manage and operate multiple software and applications with ease. When you integrate PostGrid with your system, you can perform numerous tasks, viz., data fetching, with a single click.

Similarly, we offer Zapier integration, which helps you to incorporate over 1600+ apps. This way, you can automate most of the tasks and functions.


One of the excellent features of PostGrid address validation API is that it detects similar customer details present in your system and removes them.

More than often, due to retargeting, most companies contain the record of a single prospect multiple times in their database. It results in sending several copies of your direct mail to a single potential customer.

Hence, you not only annoy the recipient but also cost yourself money, which goes into creating, printing, and shipping the direct mail. Plus, depending on the number of duplicate addresses present in your system, this cost keeps going higher.

That’s why de-duplication of the addresses is as essential as verifying the validity of the addresses. Apart from this, the validation API also helps remove all the information gaps, spelling errors, typing mistakes, and other similar errors from your mailing list.


Besides providing you with excellent features to reduce your investment and misspending and increase your returns, PostGrid offers competitive prices. Depending on your business type and size, you can choose a package that best suits your needs. We offer no hidden fees. You only pay for the options and features you decide to get.

Why Should You Go for PostGrid Address API?

CASS & SERP Certified

Addresses are verified to CASS (USPS) and SERP (Canada Post) standards ensuring addresses are verified to the highest standards and ensure higher delivery rates and eliminating wasted hours or spends.


Get detailed insights and the status of the API including usage, limit, and verification status.

Easy Integration

Seamless integration capabilities, detailed API docs, and dedicated dev support are available to get you started quickly.

Address Validation

Addresses are verified and validated to local postal standards ensuring higher accuracy in deliverability and eliminating returned mail.


Save your customers’ time with PostGrid’s address autocomplete feature and ensure a seamless user experience and reduced chances of entering wrong addresses with auto-suggestion.

Address Parsing

Get each address into its different component, viz., address line 1, address line 2, street, city, state, and zip code with zip code API.

Data Cleansing

Cleanse, verify, and deduplicate addresses efficiently, our Address API is CASS (USPS) and SERP (Canada Post) certified.


The time-saving feature can help you get all the captured addresses in the standard US postal address format.

Bulk verification

Get thousands of addresses verified in seconds with PostGrid, and save tons of hours of tedious work.

Competitive Prices

Industry best pricing without compromising on quality.

24 Hour Support

Our support team is available 24 hours a day. If you ever get stuck anywhere in the process get in touch with us.

Benefits of Using PostGrid’s Address API

Here are some other benefits of using PostGrid Address Validation API:

Validate at the entry point: PostGrid assigns the DPV (Delivery Point Verification) codes to all the addresses as per the USPS address API database. This feature checks the validity of the address your prospects are typing in the empty fields and gives them proper suggestions. This way, you keep and enter only the correct addresses in your mailing list.

The LACS Link: Using the Locatable Address Correction System Link, PostGrid updates your database with the addresses changed or modified for emergency purposes.

The RDI System: Residential Delivery Indicator is a feature in PostGrid that helps you detect and separate the commercial address from the residential one.

SuiteLink: This unique feature enables the API to find and fix the apartment, floor, room, or suite number if your prospects provided the wrong or no address such information at all. This feature can save you from dropping the packages at the main gate of the building, exposing you to the chances of losing them. With this facet, you ensure the delivery of your direct mail right to the door of your recipient.

Intelligent Mail Barcodes: If you want to locate and track your shipped direct mail pieces, PostGrid helps you do it with intelligent mail barcodes. This feature also enables you to find out the exact time it’s taking for your mails to reach the recipient after being shipped, which can help the final analysis of your direct mail campaign.

No more lost direct mail pieces:

If you start using PostGrid’s address standardization API, then all the addresses present in your database will be accurate without any data duplication or information gaps. Depending on the number of direct mail you send out and how often, you can save a tremendous amount of money and time.

And since no mail is returning or getting lost on its way, the chances of lead conversion also rise with twice the speed as before, and subtracting the investment from the outcome; you can start seeing an ultimate boost in your revenue generation.

Best data quality:

By utilizing PostGrid address autocomplete API at the point of entry, you can ensure that the right address will enter your system. It not only saves you from sending direct mail to wrong or incomplete addresses but also from spam trying to enter your system.

Besides that, with regular cleaning, verifying, and updating your old data list with PostGrid, you can get a quality database within a few days.

Improved Communication:

The foundation of a successful business is effective communication with its customers. When your mail reaches the correct address, your chances of missed opportunities decrease exponentially as your relevant offers get in front of the right people.

With PostGrid address correction API, you can ensure high-quality output. Most of our clients admit that they were spending more on their direct mail marketing campaigns before they started using PostGrid—it helps decrease the overall cost and increase revenue generation.

Decreased mailing cost:

With better address quality, you automatically reduce wasted spending associated with returned mail or loss of mail due to incorrect addresses. Our address verification software will ensure your addresses are cleansed, verified, and standardized to local postal standards ensuring a smooth print and mail process.

Quick benefits of using PostGrid

Increment in overall process speed:

With a fast and on-the-spot Address normalization API, you can eliminate the manual work and speed up the process. As it takes around 3-5 business days to verify the collected addresses manually.

Faster turnaround time:

With less manual work and verifying the addresses instantly on submission, you can also send the requested document (or a particular offer) in comparatively less time.

Scalable services:

You can verify as many numbers of addresses as you want. From thousands to millions of addresses, our address validation API and software help our clients verify them all.

What is Address Fraud and How to Prevent it?

Cybercriminals often use fake or stolen identities to give false data about their location to use products or services. It is a significant concern for businesses and their revenues. They can compromise their entire business and its growth.

There are two main types of address fraud;

  • Shipping address fraud
  • Billing address fraud

Shipping address fraud occurs when an individual uses fake or invalid addresses to receive goods or services without paying a penny. At the same time, billing address fraud occurs when someone provides a counterfeit or invalid billing address to avoid paying for products or services. Cybercriminals may use various techniques to conduct an address fraud. They could use fake IDs or virtual private networks (VPNs) to fake their location and identity.

Impact of Address Fraud on a Business

An address fraud can harm a business both financially and reputationally. Let us examine how;

Financial Losses

Fraudsters who successfully conduct address fraud can send shipments to various locations or get products and services without payment. The retailer faces massive losses on the product, shipment charges, and chargeback fees. It can even cripple a strong e-commerce giant over time.

Damage to Business Reputation

Negative news spreads like wildfire. Fraudulent transactions can make the merchants cancel orders, issue refunds, or manage chargebacks. It can create a very negative experience for legitimate customers. People will start to lose trust in their business and look for competitors.

Legal Action

Customers, payment processors, and regulatory authorities can also take legal action against merchants who fail to deal with fraud. There are severe consequences of these legal steps. The merchant may need to pay hefty fines, face penalties, or even lose the ability to process transactions.

Vital Elements of the Address Verification Process

A typical address verification process comprises two steps;

  • Upfront
  • Referential

An “upfront” location is when a customer inputs location information in a website's search field. Address validation technology works automatically to fix any mistake or missing information while the customer searches for an address.

The automatic autofill suggestions prevent users from making mistakes during the data entry.
The address verification process for “referential” applications occurs retroactively. A company cross-checks the data against an official database once users enter the address.

Referential applications can help in standardization, cleansing, and supplementing. Let us explain each of them in brief;

Address Standardization

An API can standardize addresses according to local postal formats. It helps postal workers in sorting mail and fast-tracking deliveries.


It refers to fixing typographical errors or incorrect address information. Professionals and companies prefer using address validation APIs to cleanse insufficient data from their address databases.


Address verification solutions add missing elements to the address information. It helps companies and postal workers improve the delivery and navigation process.

Which Businesses Should Use an Address Verification API?

The primary use of the API is to ensure that the data entering your system is correct, free from errors, complete, and exists. Besides that, it also checks for other details and keeps the spam from entering your database, similarly, you can also check the already registered addresses in your system for accuracy. The API will analyze and match all the addresses with the standard data available in your country’s postal services in the case of PostGrid—USPS.

Here’s a list of the businesses that can use USPS address validation API:

  • E-commerce platforms: All e-commerce sites need to deliver products to a number of addresses daily. And sending the mailers regularly to wrong shipping addresses can cost them way too much money, and eventually decrease their returns. Hence, an address verification service is essential for these companies to not only maintain their profit but also to gain high returns.
  • Branding Personal Stores: Most businesses start to sell – the products available in their stores – online and offer shipping options to their customers for convenience. However – in an era of online payment – delayed delivery or sending the packages to the wrong address may ruin the stores’ reputation and cause business loss. That’s why most such companies contact us to get PostGrid to verify the addresses in their database.
  • Third-Party Logistics: Some 3PL companies – that contract with online brands and other product-selling businesses for shipping their products – usually take postal address validation web services like PostGrid. These services help them serve their clients better with minimum returns.
  • Short-term Rental Homes Service Sites: Most of the time, when a new user lists their property on a site like these, it becomes necessary to confirm the location to prevent the end-user from getting lost or having difficulty finding the homes. It’s especially essential for users opting to pre-book homes or hotels. Address Lookup API & tools like PostGrid help businesses gain the trust of their customers by providing them with accurate data.
  • Credit Check Services: Banks or other financial services companies – which are not directly related to shipping mailpieces – can benefit from the address correction API like PostGrid to save money. To connect the people offering and needing a loan, the companies are required to do a credit check. And despite the accuracy of the data provided, they need to get the job done. That’s why PostGrid offers address validation software for a wide variety of businesses. It helps avoid misspending.

Advantages of Using a Reliable Address Verification Solution for Businesses

Accurate addresses are vital for smooth business operations. It can enhance deliveries, user identification, and customer experience and reduce frustration. Here's why you should consider a reliable address verification solution for your business;

Incredible User Experience

The address verification process can occur in real-time when a user enters data in a search field. They don't have to wait or navigate to other pages to fetch accurate data. The validation works on the same, and only precise information goes into the system.

It drastically improves the user experience, and website visitors can save much of their time. They will start to appreciate that you are making efforts to ensure address accuracy.

Reduction in Mailing and Shipping Costs

Only complete and correct address information can lead to timely or failed deliveries. The shipment costs also increase with these delays and failures. Shipping carriers can also administer Address Correction Penalties on these companies.

Address verification APIs can help companies with postage, printing, and other costs. They can even learn whether a location is a business or residential address.

Get More Accurate Data

Companies send vast amounts of resources to fix wrong addresses in their database. Real-time address verification can help them only enter legit addresses at their entry point.

The API verifies the input data against official address databases like USPS and Canada Post. Highly accurate data is necessary for every business operation.

Decreased IT Costs

Manually fixing wrong addresses takes higher IT costs and time. A professional solution can reduce these costs and companies from periodic maintenance and server charges. Monthly or annual subscription models are a lot cheaper than in-house solutions.

Strong Fraud Prevention Mechanism

Many businesses use address verification tools to verify identity to fight against fraud. These tools can quickly verify the cardholder's addresses and the person purchasing authenticate transactions. It can add a layer of protection against fraudulent transactions over the internet.

Higher ROI

Address verification tools give less returned mail, fewer address correction penalties, lower mailing and packaging costs, and less waste. All this translates into higher ROI for the companies using these address validation APIs in their sales, marketing, or business operations.

Better Customer Satisfaction

Incorrect addresses are the main reason behind lost or late deliveries. It could be a concern about a company's reputation and its customers. Users will build a negative perception of the business failing to deliver packages on time.

An address verification solution can improve the customer experience by ensuring a smooth delivery process. Postal carriers can also benefit from these solutions while delivering mail and packages nationwide.

Different Types of Address Tools

There are different types of address tools available in the market. Each can have a distinctive use case for a specific professional or business. Experts often divide these tools into the following categories for more straightforward classification;

Address Autocomplete

Most address inaccuracies are a result of poor input data. An address autocomplete API can provide relevant suggestions while users try to enter postal addresses. It is an effective method of suggesting accurate addresses while reducing invalid data from entering the database.

It is similar to geocoding. Yet, both have different purposes. Autocomplete focuses on guessing the complete PO box addresses from segments of a postal address. It provides multiple suggestions to help the user choose the correct one.

In contrast, Geocoding requires a complete address as an input to provide the relevant coordinates.

Geocoding API

This software helps users input a postal address to fetch the corresponding geographical coordinates. A Geocoding API helps firms and professionals to locate consumers on a map. They can efficiently plan delivery routes or draw distance estimates.

PostGrid's API can use entire addresses or their components to fetch the correct longitude and latitude data. It simplifies a lot of headaches while delivering mail and packages to consumers.

Address Standardization

People can find different methods to write the same address. Yet, they must acknowledge other countries have specific postal standards. The mailing process could be faster if they abide by these standards.

An address standardization software can ensure businesses record locales in the correct format. They can also convert various addresses into accurate format for different mail carriers and countries. It helps them in reducing incomplete, unnecessary, or invalid information.

Firms need these standards to ensure faster and hassle-free delivery of mail. PostGrid's API gives you address components, such as city, county, postal code, ZIP code, street name, and house name.

Address Verification

Users can intentionally or mistakenly enter invalid addresses into your records. It can lead to failure or delays. Some companies also face fraud or fake users on their platforms. An address verification solution is necessary to avoid delays, fraud, and frustrated users.

Even a slight alteration to an actual address could render into an invalid address. Companies prefer using a trustworthy address verification tool to verify their data against multiple official postal databases.

Reverse Geocoding API

It is the exact opposite of Geocoding API. Users must provide the relevant coordinates to locate the corresponding address. These APIs could be helpful for firms that must identify their customer's location through their longitude and latitude.

PostGrid's reverse geocoding capabilities can help you quickly find matching geographical coordinates.

What is Geomarketing?

Accurate address data can also open remarkable marketing opportunities for businesses. The localized data is often necessary to refine business and advertising strategies. Location data can give access to demographic information, such as;

  • Age
  • Gender
  • Race and ethnicity
  • Income group
  • Education
  • Occupation
  • Household size
  • Socioeconomic status
  • Marital status
  • And more!

Marketing professionals can use this information to create heat maps for better analysis. They can also track the success of their campaigns in specific areas to conclude. Geomarketing is necessary to understand consumer behavior and preferences.

Professionals can launch and optimize their efforts to prospects based on their current or past locations. Many experts use real-time data to tailor their marketing campaigns and send relevant content.

How Address Validation Can Improve Customer Service?

PostGrid's address validation API services can be vital in ensuring every shipment reaches customers seamlessly. The API can instantly verify and standardize addresses whenever customers provide their postal PO box addresses to your website.

Real-time validation is handy to avoid shipping errors, reduce follow-up calls to confirm addresses, and fast-track issue resolution. All these efforts can enhance the overall experience and build trust and loyalty.

What are NCOA and CASS?

Millions of people change their addresses yearly, making it hard for mail to reach their doorsteps. A robust system is necessary to ensure all the locales are latest and up-to-date.

National Change of Address Database (NCOA)

The National Change of Address Database (NCOA) ensures only the latest address information is present.

It helps address verification tools ensure that businesses have the most current addresses of their customers. These APIs can use the NCOA database of USPS. There are two different NCOA databases in North America;

  • Canada Post
  • United States Postal Service (USPS)

The Canadian Post maintains over 4 million Canadians changing addresses every year. At the same time, USPS maintains NCOA records for over 160 permanent address changes. One must note these two systems are not connected.

NCOA records are helpful in both countries for various business intelligence applications. Data from these databases can help companies avoid delivery failures and increase their customers' lifetime value.

Many mail forwarding services also use NCOA records for identifying people and businesses moving across the nation. Senders can equip themselves with the latest and up-to-date address information.

Firms can re-engage with active and lost customers using an address verification API. Marketers can reduce marketing wastage from non-deliverable mailings and packages. Knowing a customer's new location can also provide additional up-selling and cross-selling opportunities.

The following are some notable benefits of using NCOA data;

  • It is more affordable than acquiring a new customer.
  • Firms can reduce expenses on postage, printing, and mailing.
  • Marketers can re-engage with lost and lapsed consumers.
  • NCOA can improve sales opportunities, response rates, and ROI.
  • Companies can boost their customer relationships.
  • It streamlines the delivery of mail pieces to the intended recipients.

CASS Certification

Firms and professionals should look for a solution with CASS certification. A tool meeting the Coding Accuracy Support System (CASS) will ensure more expedient delivery. They can save resources and improve customer satisfaction using software that meets these standards.

What is USPS Address Validation API?

USPS provides an official address verification API for individuals and businesses to verify locales against their vast database. It might be the official solution for validating addresses in the US. Yet, the API could be better for various use cases.

For example, one may only use the API for USPS mailing services. It is not suitable for batch processing or cleansing databases. Plus, the API can only work with domestic addresses within the US. Professionals use third-party solutions for verifying international locations.

The US Postal Service allows third-party vendors to develop their API using the official USPS database. It is excellent news for individuals with diverse applications and use cases of address data.

These vendors can provide higher accuracy by verifying the input data with multiple service providers.

Professionals and businesses with advanced use cases prefer these third-party solutions for address verification. They get all the necessary additional features to work with addresses.

Challenges with Address Standardization

The postal service needs to prioritize address standardization with its API. It cares more about mail delivery instead of standardizing locations. Professionals should instead prefer using APIs that use multiple sources to standardize addresses.

It is a Time-Consuming Process

You may face a time-consuming process while standardizing an address according to USPS standards.

It is a challenging task to standardize tens of thousands of records in a single go.
Reliable address standardization software can automate a huge part of this process to save time and resources. Yet, the process might require human input to resolve and address complexities and ensure consistent outcomes.

ZIP+4 Codes Often Change

These codes depend on delivery routes in the US. The four digits help professionals to be more specific about a geographic segment within a 5-digit ZIP code. Address standardization could be challenging as these ZIP+4 codes can change depending on the postal employees working on a route.

What is the Google Address Validation API?

Google also made its entry to address validation API. The API is still in its infancy and is available only in some countries.

It could perfectly fit e-commerce businesses delivering shipments in various regions. Individuals can also use it for casual verification.

Yet, they must consider the restrictive terms and conditions to use the API. These are some limitations of Google's API;

  • Users can only store addresses for up to 30 days with their API.
  • The API parase addresses inconsistently. It might combine several components into a single value. Sometimes, it could parse these components separately.
  • Google's API could only handle 100 queries per second. It could be a concern for businesses during batch validation.
  • The API requires displaying a “Powered by Google” message on every address.

Google's API is ideal only for basic validation tasks. One should expect to run something other than advanced use cases with this new API.

How to Select a Best Address Verification API Solution?

We need guidance when we see so many options at our fingertips. Professionals and firms face the same challenge while selecting the right address verification tool. There are plenty of means with different capabilities.

What to do? Which software could be the best match for your organization? There are six fundamental considerations you must acknowledge while looking for an address verification API:

Define the Requirements

Companies looking for an address verification solution must note down their requirements first. Before reaching any vendor, they must know their use case, scalability, and integration requirements.

This first step will filter out any irrelevant option that doesn't fit their requirements list.

Data Security and Privacy Considerations

Companies must maintain a safe and trustworthy business environment. It requires them to ensure data security and privacy measures while handling address data. The API must provide encryption features and follow every data security standard.

A safe data retention and deletion policy is also necessary to avoid privacy breaches. Compliance is vital for many businesses while looking for an address verification API.

Accuracy and Coverage

Professionals must understand where their key demographics reside while making the correct decision. The accuracy rates and converge on validation could be a game-changer for some companies.

Only a few organizations could be looking for international address verification capabilities. At the same time, many might be searching for smooth integration features. Professionals must check the coverage area of the solution to take the best advantage.


Different companies will have specific workloads while using the software. A reliable, customizable, and flexible can help them define custom address verification rules. It can transform various workflows, and professionals save more time.

There should be configurable validation options and support for unique address formats. A good solution will always let you define your custom address correction rules.

Pricing and Support Options

Professionals and businesses often look for the price tag while looking for software solutions. The solution must provide value-for-money services and flexible pricing plans.

Try to search for an API with transparent pricing and a cost-effective system. Arrange a demo to get a real-world experience of the address verification solution.

Integration Capabilities

Every business aims for growth and scalability. It must be a mandatory criterion while searching for an address verification solution. Find an API that can manage increasing users, queries, and data.

Integration should be simple and faster with your existing systems and tools. The verification tool must come with sufficient developer resources and guides. It will help you create automated workflows and even run batch address verification checks.

Can PostGrid Run a Batch Address Verification?

If you are running a business, you must handle a large volume of address data. Batch verification is the answer to conserve time and resources. PostGrid can optimize your business processes with batch address verification. All you need to do is to follow these steps;

  1. Upload your address list to our server.
  2. PostGrid algorithms work tirelessly to verify, clean, and standardize addresses in the file.
  3. You get a return file with confirmed addresses.

You only need to upload your address database; we will do the rest. We can verify hundreds of thousands of addresses in a matter of minutes.

PostGrid Supports NCOA

Every year, millions of people move across the country. Properly verifying addresses is possible if you follow the National Change of Address Database (NCOA). It could be very challenging to reach these people without following NCOA.

Look for an address API that follows NCOA to ensure that you have the latest addresses of your customers. It should be a mandatory measure to avoid failed deliveries.

How PostGrid Address Verification API Trumps Every Geocoding API?

Geocoding provides coordinates (longitude and latitude) of an address or location. It can help individuals or businesses to pinpoint the coordinates on a map for better pinpointing. You can also streamline your marketing and communication efforts with geocoding. Yet, an advanced address verification tool like PostGrid can accomplish much more than a standard geocoding API.

It can assure you that the addresses you have are legitimate and deliverable by USPS. When you have precise and clean data through a CASS-certified software like PostGrid, you can create more effective marketing campaigns for your organization.

How to Use PostGrid Address Verification API:

PostGrid allows brands and companies to verify thousands of addresses in seconds. To clean your database and get rid of the information gaps, you’ll need to follow some steps:

  • Create an account on PostGrid
  • Log in and open the PostGrid dashboard
  • Secure your account by adding trusted domains only
  • Click on setting → Addresses → Copy your API keys
  • Paste the API URL in your browser

PostGrid’s address validation API can help take your business ahead by improving your direct mail campaigns and reducing wasted money. If you have a huge mailing list and your business requires you to send regular direct mail pieces, consider investing in an address correction API.

Once you’ve followed the steps described above, you’ll get a successful API call. If you face any difficulty in the process or cannot get a successful call, you can contact us or check our FAQs page.

Standard Address Verification Demo’s (US & Canada)

Autocomplete, Verify, Validate, Standardize and Geocode addresses across US and Canada

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International Address Verification Demo’s

Autocomplete, Verify, Validate, Standardize and Geocode addresses over 245+ countries globally

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Explore Address Verification

Understanding USPS API and Address Validation Web Service