While there are places in the documentation that mention using the Free API for TaxRatesByAddress, the actual page for this API says there is a "rate limit" but doesn't specify what it is. Does anybody know? And what do you do after you reach the limit -- can you pay to continue using the API?
Thank you for asking about Avalara Free APIs. We strive to keep these free APIs available for all to use. The limits on the tax content APIs are subject to change based on a number factors. If you are running into HTTP 429 errors, you are correct that you can upgrade to a paid account to continue using the AvaTax APIs. Please contact our tax technology consultants to upgrade your access.
Good question! In addition to the free content APIs, you can get more tailored tax rate data through the Tax Content APIs. The DownloadTaxRatesByZipCode endpoint does not have rate limiting when you have a paid AvaTax subscription and allows for refining the information you get returned.
Let me know if that answers your question and how that endpoint works for you.