Tariff Monitor: US Import Duty & HTS Lookup

daleweaver1981/tariffmonitor-mcp

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.

tools: 3
transport: STDIO, HTTP
last updated: Nov 12, 2026

View on GitHub

Install

From registry metadata

$ npx add-mcp https://adcreator-ai.com/mcp-free --name tariffmonitor-mcp

Run in your terminal. add-mcp asks which agents to add it to (Claude Code, Codex, Cursor and more). Add -g to install it for every project.

Review the command, arguments and environment values before installing. MCP servers run with your local permissions.

Other ways

Claude Code

$ claude mcp add --transport http tariffmonitor-mcp https://adcreator-ai.com/mcp-free

Run in your terminal. Add --scope user to make it available in every project.

Tools

Verified live · 3 tools

Verified live against the running server on Nov 6, 2026.

lookup_hts_codeFind the US HTS (Harmonized Tariff Schedule) code for a product, by plain-language product name or numeric prefix, from the official USITC schedule (19,856 10-digit codes). Use this first whenever you have a product name rather than a code (e.g. "laptop", "t-shirt", "water bot...1 params

Find the US HTS (Harmonized Tariff Schedule) code for a product, by plain-language product name or numeric prefix, from the official USITC schedule (19,856 10-digit codes). Use this first whenever you have a product name rather than a code (e.g. "laptop", "t-shirt", "water bot...

Parameters* required

query*string

Product keyword (e.g. "footwear") or HTS code prefix (e.g. "6404"). Minimum 2 characters. Single keywords match best.

calculate_tariffCalculate the full stacked US import tariff rate for an HTS code from a specific origin country. Returns: base rate, each additional layer (China Section 301 matched by HTS line to Lists 1, 2, 3, 4A and the 2024 four-year-review increases; Section 232 steel, aluminum and coppe...4 params

Calculate the full stacked US import tariff rate for an HTS code from a specific origin country. Returns: base rate, each additional layer (China Section 301 matched by HTS line to Lists 1, 2, 3, 4A and the 2024 four-year-review increases; Section 232 steel, aluminum and coppe...

Parameters* required

annual_import_value_usdnumber

Optional. Your annual import value in USD. If provided, the response includes the dollar cost of current duties and any additional cost once the Section 301 China exclusions end (after 11:59 p.m. E...

datestring

Optional. Entry date YYYY-MM-DD; the rate in force on that date is returned (e.g. "2026-11-09" vs "2026-11-10" to see the Section 301 exclusion end and the maritime duties). Default: today in US Ea...

hts_code*string

HTS code — at least 6 digits, up to 10 (e.g. "6404.11" or "6404112030"). Dots and spaces are ignored. Zero-padded headings such as "6404110000" are not real schedule codes; if the exact code is not...

origin_countrystring

ISO-2 origin country code (e.g. "CN" for China, "VN" for Vietnam, "MX" for Mexico). Default: CN.default: CN

compare_originsCompare the estimated US import tariff for ONE HTS code across several origin countries side by side (e.g. China vs Vietnam vs Mexico vs India), for sourcing and "China plus one" decisions. For each origin returns the total current rate, the layers that make it up (MFN base, S...4 params

Compare the estimated US import tariff for ONE HTS code across several origin countries side by side (e.g. China vs Vietnam vs Mexico vs India), for sourcing and "China plus one" decisions. For each origin returns the total current rate, the layers that make it up (MFN base, S...

Parameters* required

annual_import_value_usdnumber

Optional. Annual import value in USD; adds the estimated annual duty for each origin.

datestring

hts_code*string

HTS code, 6 to 10 digits (e.g. "8471.30" or "6404112030"). Use lookup_hts_code first if you only have a product name.

origin_countriesarray

ISO-2 origin country codes to compare, 2 to 8 of them (e.g. ["CN","VN","MX","IN"]). Default: CN, VN, MX, IN, TH.

Readme

tariffmonitor-mcp

tariffmonitor-mcp is US import tariff lookup software by 0xpi for AI agents and developers: an MCP server that looks up 19,856 HTS codes and estimates stacked US import duty rates (MFN, Section 301 and Section 232) by country of origin. Free and open source, with a free hosted endpoint. It is not an electricity or energy tariff tool. Made by 0xpi; 0xpi is not affiliated with Pi Network, any cryptocurrency or blockchain project.

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 see what changes when the Section 301 China product exclusions end (through 11:59 p.m. ET on January 9, 2027 per the Federal Register, FR Doc. 2026-22925, which extended the earlier 9 Nov 2026 end) for any product.

What it does

Three tools:

View the full README on GitHub

Details

Repository: github.com/daleweaver1981/tariffmonitor-mcp
Website: adcreator-ai.com/tariffs/calculator
Package: tariffmonitor-mcp
Transport: STDIO, HTTP
Registry: MCP registry, active
Tools verified: Nov 6, 2026