Database Interface API

XML or JSON response This API provides for XML or JSON responses for all three resolution levels we offer to subscribers.

We offer several levels of subscription, so your business can get the accuracy it needs without paying for more than you'll use: ZIP Code,  ZIP+4,  and Spot-On.

Database Interface subscriptions are available for a single state, or for the whole United States.

The ZIP Code API, ZIP+4 API, and Spot-On API pages have code samples for .XML or .JSON responses, allowing unlimited testing with addresses found within the ZIP code range from 90001 to 90999. If you would like to perform testing outside of that range, please call 866-492-8494 or e-mail us to request a free limited-time account.

Error Handling

The <errorInfo> element contains two elements for error handling: <errorCode> and <errorMessage>. Below is a list of possible results …

1Incorrect Zipcode
2Incorrect State as per Zipcode provided
3Incorrect City as per Zipcode and State provided
4City Alias used for address correction
5One of the mandatory input is blank
6Address not found
7Expired Account
8Invalid Credentials
9Invalid Zip+4
10Address found, but tax jurisdiction boundaries could not be matched
55Valid sample ZIP codes must fall in the range 90001 - 90999 (ZIP+4 resolution)
56Valid sample ZIP codes must fall in the range 90001 - 90999 (PinPoint resolution)
99Invalid ZIP code (Basic)
100Invalid ZIP code
111Insufficient input to specify a tax jurisdiction (PinPoint resolution)
112Insufficient input to specify a tax jurisdiction (ZIP+4 resolution)
113Insufficient input to specify a tax jurisdiction (ZIP Code resolution)
500Internal Error

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Sample ZIP Code Range

In the sample ZIP code range (90001 - 90999), the following ZIP codes contain multiple tax rates; which can be used to test the return of multiple rows:

  • 90304
  • 90601
  • 90631
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