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OpenTaxRate API
Not rated yet · Be the first to rate itUS sales tax rates by street address, from the states' own published data.
OpenTaxRate API is a free Finance API that requires no API key, is served over HTTPS and has unconfirmed CORS support.
- Authentication
- None required
- HTTPS
- Yes
- CORS
- Unknown
- Category
- Finance
- Uptime (30 days)
- 100%
Visit documentation ↗opentaxrate.com
Online · 887 msTested Nov 15, 2026 · checked dailyIs it down? Status & uptime
About OpenTaxRate
Look up sales tax for a US address, split into state, county, city and district. Rates based on public data from state tax agencies.
- Provider
- OpenTaxRate
- Website
- opentaxrate.com ↗
Details from opentaxrate.com.
Key facts
- No API key needed
- 100% uptime (30 days)
- HTTPS
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OpenTaxRate API FAQ
Who provides the OpenTaxRate API?
The OpenTaxRate API is provided by OpenTaxRate (opentaxrate.com). Look up sales tax for a US address, split into state, county, city and district. Rates based on public data from state tax agencies.
Is the OpenTaxRate API free?
Yes. The OpenTaxRate API is listed in the Finance category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
Does the OpenTaxRate API require an API key?
No. The OpenTaxRate API requires no authentication, so you can start making requests without signing up.
Can I call the OpenTaxRate API from the browser?
CORS support for the OpenTaxRate API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Does the OpenTaxRate API support HTTPS?
Yes. The OpenTaxRate API is served over HTTPS, so it's safe to use in production.
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Show that OpenTaxRate is listed on Public APIs. The badge displays its developer rating once it has one.
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