Tasks these servers can do
What are candidate tariff codes for a ceramic flower pot in the UK?
Call find_tariff_codes on Tariff & HS Code Duty Finder (https://tariffs.openkrill.app/mcp). Candidates from the UK Trade Tariff or the US Harmonized Tariff Schedule, depending on the destination you set to GB or US. The EU schedule is not covered here.
Install steps: ChatGPT, Claude, Cursor, VS Code, Pi.
What is the US duty printed for 8507.60.00?
Call get_duty_rate on Tariff & HS Code Duty Finder (https://tariffs.openkrill.app/mcp). The rate on that code. For the UK you can also pass an origin country for the preferential rate. US chapter 99 additional duties are not included.
Install steps: ChatGPT, Claude, Cursor, VS Code, Pi.
Is ATU33864707 a valid VAT number?
Call check_vat_number on EU Business & VAT Checker (https://eubusiness.openkrill.app/mcp). The VIES validity result and the registered name when the member state publishes a legal-entity name. It is not a credit check.
Install steps: ChatGPT, Claude, Cursor, VS Code, Pi.
What they will not do
Describe the goods. Do not include buyer names or addresses. A landed-cost estimate is available on Shop Duty Desk for a UK, US or EU destination and is still not a customs filing.
Where to start
Each link above is a client-specific install page with one call that was checked against the live server. The plain-text list of every server is llms.txt specification. The words MCP, tool and streamable HTTP are defined in the MCP and agent glossary.