Tariff & HS Code Duty Finder in Pi

Questions it answers

Find an HS code, HTS code or customs code, and read the customs duty or import tax. Ask "what is the tariff code for a ceramic flower pot in the UK?", "what is the US duty on HTS 8507.60.00?" or "what duty applies to code 6914100000 from Vietnam in the UK?".

Tariff and HS Code Duty Finder reads the official schedules published by governments: the UK Trade Tariff (HM Revenue & Customs) and the US Harmonized Tariff Schedule (US International Trade Commission). Describe the product and it lists the codes whose descriptions match, with the headings above each one so a line that only says "Other" can be read in context. Give a code and it returns the description, the duty rate and, for the UK, the VAT rate, the preferential rate for the country the goods come from and other measures that apply. People also call it Tariff Code Finder.

Use it for a Harmonized System code, an HTS classification or a customs classification. Schedule B export codes often share the first digits of an HTS code, but this tool reads the import schedules, not the Schedule B export list. It does not search the EU TARIC list.

The codes it finds are candidates, not a classification. Which code is right depends on what the product is, what it is made of and how it is used, and customs decides. Check a candidate against the schedule's notes and confirm with customs or a licensed customs broker before you declare goods. For a binding answer, ask customs for a ruling.

The duty it shows is the rate in the schedule for that code. It does not add every extra duty, quota, anti-dumping measure or trade remedy. For the US, additional duties under chapter 99 of the schedule are not included. Rates change on published dates, so check the schedule on the day you ship.

It covers imports into the United Kingdom and the United States only. It stores nothing about you: answers are cached for up to 6 hours, and the only lasting record is a daily count of calls per tool.

Short questions this server answers, each with a direct answer: HS Code Finder and US or UK Import Duty Rate Lookup.

What it can do

• Finds candidate HS codes, HTS codes and customs codes for a described product in the UK or US schedule
• Shows the headings above each candidate, so lines called Other can be read in context
• Reads the customs duty and import tax rate for a UK or US tariff code
• Shows UK VAT, the preferential rate for an origin country and other measures on a code
• Lists the lines under a heading when a code is not one goods are declared under
• Labels every code as a candidate to check with customs, not a binding classification

Tools

• find_tariff_codes, Find an HS code, HTS or customs code. Use this when the user asks for the tariff code, commodity code, customs code, HS code, HTS code, Harmonized System code or customs classification for a product, for example "what is the tariff code for a ceramic flower pot in the UK?", "HTS code for a lithium-ion battery" or "which heading covers cotton t-shirts for import into the US?". Pass a plain description of the product and country GB (United Kingdom) or US (United States). Returns candidate codes from the official schedule, each with its description, the headings above it and whether goods are declared under it, plus a notice that they are candidates and not a binding classification. Do not use it to classify goods with certainty, to give a binding customs ruling, to compute shipping or landed cost, or for countries other than GB and US.
• get_duty_rate, Get customs duty, tariff and import tax. Use this when the user asks what import duty, customs duty, tariff, import tax or VAT applies to a tariff code or HS code, for example "what is the US duty on HTS 8507.60.00?", "what duty applies to UK commodity code 6914100000 from Vietnam?" or "what is under heading 6914 in the UK tariff?". Pass the code (4 to 10 digits, dots allowed), country GB or US, and originCountry when the user names where the goods come from. For a code goods are declared under it returns the description and the rate: for the UK the third-country duty, VAT rates as a list, the preferential rate and any additional duty for the origin, and other measures; for the US the general, special and column 2 rates and units. For a code that is only a heading it returns the lines beneath it instead. Chapter 99 additional duties for the US and quotas or trade remedies are not included. Do not use it for a landed cost estimate, for excise or customs-broker fees, or for legal advice.

Add Tariff & HS Code Duty Finder in Pi

Pi does not speak MCP on its own. The pi-mcp-adapter extension (these steps match version 2.34.0) loads remote servers and keeps their schemas out of the prompt until you ask. Install it once, then restart Pi:

pi install npm:pi-mcp-adapter

Add the server to a shared MCP file. Use .mcp.json in the project if only that project needs Tariff & HS Code Duty Finder, or ~/.config/mcp/mcp.json if you want it in every project. Pi also reads ~/.agents/mcp.json. A Pi-only override lives in ~/.pi/agent/mcp.json or .pi/mcp.json and wins over the shared file.

{
  "mcpServers": {
    "tariffs": {
      "url": "https://tariffs.openkrill.app/mcp",
      "lifecycle": "eager"
    }
  }
}

The url is enough. Do not set command: that field is for a local process. No API key header. lifecycle is eager so Pi connects at startup and can search tool names before the first call. A config that omits it still works: the first call connects. After restart, run /mcp and confirm the server is listed. Ask: What are candidate tariff codes for a ceramic flower pot in the UK? The adapter should offer find_tariff_codes, get_duty_rate.

Leave directTools off unless you want those schemas in every turn. With a handful of tools the cost is small. The default proxy is the better fit: search for the tool, then call it. /mcp disable tariffs writes a project override in .pi/mcp.json without editing the shared file. Run /reload after that change.

Pi will not find this server by scanning Cursor or Claude config unless you run /mcp setup and import it. Putting the url in .mcp.json is the direct path and the one this page tests against. The server is the same public endpoint the other clients use, with the same limits and the same privacy rules.

If it does not work

A call checked on 2026-10-17

HTS 8507.60.00 is the lithium-ion battery heading named in the plugin's starter prompts. The rate is a schedule reading, not a classification. The request below was posted to https://tariffs.openkrill.app/mcp as tools/call. HTTP 200. Source: the Tariff & HS Code Duty Finder server, read 2026-10-17.

{
  "method": "tools/call",
  "params": {
    "name": "get_duty_rate",
    "arguments": {
      "code": "8507.60.00",
      "country": "US"
    }
  }
}

• source. Harmonized Tariff Schedule of the United States (hts.usitc.gov), published by the US International Trade Commission.
• country. US
• notice. These are candidate codes from the official tariff, not a binding classification. The right code depends on what the product is, what it is made of and how it is used; confirm with customs or a licensed customs broker be

Repeat the call yourself if you need a newer reading. Cached answers expire. A rate limit is not a result: wait and try again. Nothing in the call is a ranking, a filing, or advice.

Using it in production

Nothing to install and nothing to run: no package, no Python or Node.js version and no environment variable. Tariff & HS Code Duty Finder runs on our servers, and your client only needs the URL https://tariffs.openkrill.app/mcp.

Use it in other apps

• Tariff & HS Code Duty Finder in ChatGPT
• Tariff & HS Code Duty Finder in Claude
• Tariff & HS Code Duty Finder in Cursor
• Tariff & HS Code Duty Finder in VS Code

Roles that use Tariff & HS Code Duty Finder

• Importer guide

Frequently asked questions

Words on this page

• MCP (Model Context Protocol) definition
• Streamable HTTP transport definition
• Tool primitive definition
• Rate limit policy definition

Source: plugin listing for tariffs in this repository, and a live tools/call on 2026-10-17. As of 2026-10-17.