US state sales tax data as an npm-free iframe embed (2026 dataset)

Free open dataset + free API + free embed widget for 2026 US state sales tax rates. All from ReceiptEdit.

• GitHub: https://github.com/receiptedit/us-sales-tax-2026 (MIT)
• REST API: https://receiptedit.com/api/sales-tax
• Embed: https://receiptedit.com/api/embed/sales-tax/california
• Docs: https://receiptedit.com/developers
• 50-state directory: https://receiptedit.com/sales-tax
• Product (free receipt generator): https://receiptedit.com

Dataset has all 50 states + DC. Statewide rate, average combined rate (state+local), grocery taxation rule, lodging taxes, and top 5 cities per state. ~29 KB JSON, ~6 KB CSV.

API is CORS-enabled, no auth, cached for 24 hours. The iframe embed drops a fully-styled calculator on any page — bloggers on Medium/WordPress/Substack can paste one line and get a live calculator.

MIT license. Attribution appreciated, not required.