Watch rules
What Shop Rules checks, where, and how often. Seed values are starting points; every alert quotes the live page.
Tariff
CBP, USTR, the Federal Register, trade.gov, and the HTS. Origin, Section 301, de minimis, and the HTS heading the classifier proposed.
Product safety
CPSC, FDA, FTC, FCC, and OEHHA for Prop 65. Seeded from what the product is: items for children, cosmetics, batteries, textiles, food contact.
Sales tax
The revenue site of each state you ship to. Economic nexus thresholds and marketplace facilitator rules.
Marketplace policy
Seller Central, Etsy Help, and Shopify Help for category policy changes.