Tax Rate Lookup API

Tax Rate Lookup API

Tax Rate Lookup API is a tool used by companies to automate the sales tax calculation process for transactions occurring in the United States.

API description

About the API:  

The API is designed to integrate with a company's sales and billing systems to automatically calculate the appropriate tax rate and generate accurate tax reports.

Tax Rate Lookup API can be used by a wide variety of businesses, from small start-ups to large corporations, to streamline the sales tax process and ensure compliance with state and local tax laws. The API works by accessing the different zip codes, states and cities applying those rates to each transaction.

One of the main advantages of using a Tax Rate Lookup API is accuracy. By automating the sales tax calculation process, companies can reduce the risk of human error and ensure that the correct tax rate is applied to each transaction. This can help companies avoid costly errors and penalties that can result from incorrect tax calculations.

Another advantage of using a Tax Rate Lookup API is efficiency. By automating the sales tax process, companies can save time and resources that would otherwise be spent on manual calculations and tax reporting. This can free up staff time for more important tasks, such as sales and customer service.

Tax Rate Lookup API also provide companies with real-time tax rate updates, ensuring that the most current rates and rules are always applied to each transaction. This is especially important given the frequency with which tax rates can change at the state and local level.

When choosing a Tax Rate Lookup API, businesses should consider factors such as cost, reliability, ease of use and customer service, which is why this API meets their requirements.

In conclusion, this API are a powerful tool that can help businesses automate the U.S. sales tax calculation and reporting process. By providing real-time tax rate updates, ensuring accuracy and compliance, and streamlining the tax filing process, sales tax APIs can help businesses save time and resources while minimizing the risk of costly errors and penalties.


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 platforms: This API can be integrated with e-commerce platforms such as Shopify, WooCommerce and Magento to automatically calculate sales tax for online transactions.

  2. Point-of-sale systems: Retailers can use APIs to calculate and apply the correct sales tax rate to in-person transactions.

  3. Marketplaces: Can integrate with online marketplaces such as Amazon and eBay to automatically calculate sales tax for transactions occurring on their platforms.

  4. Mobile apps: Can integrate with mobile apps that process transactions, such as food delivery or ridesharing apps, to ensure that the appropriate sales tax is applied to each transaction.

  5. SaaS companies: Can be used by software-as-a-service (SaaS) companies to automatically calculate sales tax for monthly or annual subscriptions.

Are there any limitations to your plans?

Besides API call limitations per month, there are no other limitations.


API Documentation


To use the API all you have to do is insert in the parameters a zip code, city and state.


Get US Taxes - Endpoint Features
Object Description
zip_code [Required]
city [Required]
state [Required]
Test Endpoint


                                                                                                                                                                                                                            [{"zip_code": "60601", "total_rate": "0.102500", "state_rate": "0.062500", "city_rate": "0.012500", "county_rate": "0.017500", "additional_rate": "0.010000"}]


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 Tax Rate Lookup 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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