Observed arrival · 2026-11-10
situs.tax: sales-tax rates with their uncertainty attached
An API for US sales-tax rates that returns a rate alongside its precision level, coverage, source, and effective date.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Small sites handling US sales tax
- Worth noticing
- The page reports that 1 in 11 addresses get the wrong rate at ZIP-level precision, with a worst measured gap of 2.70 percentage points.
Field notes
The documented request uses a bearer key and sends an address plus state to `/v1/rate`; the example answer breaks out jurisdiction names and rates rather than returning only a combined figure. The page says rates are versioned instead of overwritten, and describes a date query for past rates. Its ZIP comparison is dated 2026-11-08, while the listed commerce-platform plugins are still plans.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
$PaidCommerce or pricing visible
✦PrettyNotable craft visible
◎NicheUnusually specific use
One card from the complete issue