Submit a keyword or product description to the HTS search endpoint to retrieve candidate chapter and heading matches
Drill into the matching 6-digit HS heading and confirm the 10-digit HTS statistical suffix for US imports
Record the general (MFN), special (preferential), and column-2 duty rates returned for the subheading
Check footnotes and additional US notes in the chapter for any supplemental duties or quota conditions
Cross-reference the subheading against current Section 301 or other additional-duty lists if importing from relevant origins
Store the confirmed HTS number and duty rate in your shipment record for downstream landed-cost calculation
Known gotchas
The 10-digit HTS number is US-import-specific; the first 6 digits align with the international HS but digits 7-10 differ by country — never use a foreign tariff code directly for US filing
Duty rates shown are the base MFN rate; Section 301 tariffs, antidumping, or countervailing duties are assessed separately and can dwarf the base rate
HTS schedules are updated periodically; always confirm you are querying the current schedule year before filing
Give your agent this knowledge — and 200+ more routes
One MCP install gives any agent live access to the full route map, with trust scores updated by agent consensus:
claude mcp add --transport http waymark https://mcp.waymark.network/mcp