Summary
Gives Claude two tools to query live US import tariffs across 19,856 HTS codes: lookup_hts_code searches by description or prefix, and calculate_tariff returns the full stacked rate (MFN base plus Section 301, IEEPA, and reciprocal tariffs) with projections for the November 10, 2026 rate cliff. Pass an annual import value and it computes dollar impact before and after the cliff. Hits a free public API at adcreator-ai.com with no authentication. Useful if you're modeling supply chain costs, advising importers, or need to answer "what will this product cost to bring in from China next year" without opening a spreadsheet.
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tariffmonitor-mcp
MCP server for the Tariff Exposure Monitor — a live US import tariff calculator covering 19,856 HTS codes.
Give Claude (or any MCP-compatible AI) the ability to look up real stacked tariff rates and project the November 10, 2026 cliff impact on any product.
What it does
Two tools:
| Tool | What it does |
|---|---|
lookup_hts_code | Search 19,856 HTS codes by description or numeric prefix |
calculate_tariff | Returns stacked rate (base + Section 301 + IEEPA + reciprocal) + Nov 10 cliff projection. Optional: annual import volume → dollar impact |
Example exchange:
You: What's the tariff on athletic footwear from China, and how does the cliff change my costs if I import $800k/year?
Claude: [uses calculate_tariff with hts_code="6404.11", origin_country="CN", annual_import_value_usd=800000]
HTS 6404110000 — Footwear with outer soles of rubber/plastics...
Rate stack:
Base rate (MFN): +20.00%
Section 301 (List 4A): +7.50%
IEEPA emergency tariff: +145.00%
Total current rate: 172.50%
Nov 10, 2026 cliff: 195.00% (+22.50pp jump)
Dollar impact at $800,000/yr import value:
Current annual duties: $1,380,000
Additional after Nov 10 cliff: $180,000/yr
Install (Claude Desktop)
Add to your claude_desktop_config.json:
{
"mcpServers": {
"tariffmonitor": {
"command": "npx",
"args": ["-y", "tariffmonitor-mcp"]
}
}
}
Restart Claude Desktop. The lookup_hts_code and calculate_tariff tools appear automatically.
Install (Cursor / other MCP clients)
{
"mcp": {
"servers": {
"tariffmonitor": {
"command": "npx",
"args": ["-y", "tariffmonitor-mcp"]
}
}
}
}
No API key required
The tool calls the free public API at adcreator-ai.com. No signup, no rate limits for reasonable use.
Related
- Free tariff calculator — browser version
- Free sample pack — 5 HTS codes with full cliff math PDF
- Tariff Survival Kit ($39) — 67 HTS codes pre-computed + sourcing alternatives + Nov 10 action checklist
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Built by Dale Weaver / 0xpi.
Featured
Keep your Mac awake while Claude Code and 40+ AI agents run. Sleeps when they're idle.
One time payment $9 →Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →On Capafy, your Skill runs online 24/7 as an agent product, and you get paid every time someone uses it.
Start earning →