US Postal Tax API

US Postal Tax API

The US Postal Tax API delivers precise, up-to-date tax data for specific geographic areas within the United States.

About the API:  

The US Postal Tax API is a powerful and essential tool for users seeking accurate and up-to-date tax information tailored to specific geographic areas within the United States. This API provides comprehensive tax rate data based on zip codes, enabling users to make informed financial decisions, automate tax calculations and streamline compliance processes.

In essence, this API is designed to provide accurate tax rate information at a level of granularity that goes beyond simply providing data at the state or city level. It allows users to pinpoint tax rates at the ZIP code level, ensuring that tax calculations are as accurate as possible for sales tax, use tax, property tax and other related purposes.

One of the most outstanding features of the US Postal Tax API is its ease of integration. Users can effortlessly incorporate this API into their applications, websites or financial systems to programmatically retrieve tax rate information. This capability is especially valuable for e-commerce companies, point-of-sale systems and financial software applications, where real-time tax rate accuracy is crucial.

API data comes from authoritative and trusted government sources, ensuring reliability and compliance with ever-changing U.S. tax regulations. This means users can be confident that the data retrieved from the API is accurate and up-to-date, minimizing the risk of errors and potential compliance issues.

In conclusion, the US Postal Tax API is an indispensable resource for anyone needing accurate and detailed US tax rate information. Its accuracy, ease of integration, data reliability and flexibility make it a valuable asset for users looking to simplify tax compliance, improve financial accuracy and increase overall operational efficiency. Whether you are a retailer, software developer or financial professional, this API is a powerful tool that can help you navigate the complex U.S. tax landscape with confidence.


What this API receives and what your API provides (input/output)?

It will receive parameters and provide you with a JSON.


What are the most common uses cases of this API?

  1. E-commerce payment: Calculate and display accurate sales tax rates for online shoppers based on their zip code, ensuring compliance with local tax regulations.

  2. Point-of-sale systems: Integrate the API into point-of-sale systems to automatically calculate and apply the correct sales tax at the cash register.

  3. Property management: Determine property tax rates for property owners and property management companies managing real estate in different zip codes.

  4. Accounting software: Integrate tax rate data into accounting software to automate tax calculations and generate accurate financial reports for businesses and individuals.

  5. Retail analysis: Analyze sales data along with tax rate information to gain insight into the impact of taxes on sales and profitability.

Are there any limitations to your plans?

Besides the number of API calls, there is no other limitation.

API Documentation


To use this endpoint you must indicate in the parameter a US zip code.


Tax by Zip Code - Endpoint Features
Object Description
zipCode [Required]
Test Endpoint


  "rate": 0.1105

Tax by Zip Code - CODE SNIPPETS

curl --location --request GET '' --header 'Authorization: Bearer YOUR_API_KEY' 


API Access Key & Authentication

After signing up, every developer is assigned a personal API access key, a unique combination of letters and digits provided to access to our API endpoint. To authenticate with the US Postal Tax API REST API, simply include your bearer token in the Authorization header.


Header Description
Authorization [Required] Should be Bearer access_key. See "Your API Access Key" above when you are subscribed.

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To use this API users must enter a US zip code.

There are different plans suits everyone including a free trial for small amount of requests, but it’s rate is limit to prevent abuse of the service.

Zyla provides a wide range of integration methods for almost all programming languages. You can use these codes to integrate with your project as you need.

US Postal Tax API is a tool that provides users with accurate U.S. tax rate information through a zip code.

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