About

Small tools, shown working.

Swanum is a small independent studio. We build single-purpose tools on top of public records and publish the records with the answer.

What we make

Comps answers “what did this actually sell for on Vinted?” with confirmed sold prices from Vinted in the UK, France, Germany, Italy, Spain, the Netherlands and Poland. It is used on the web, through an API, from AI assistants and as a browser extension.

The US import duty calculator gives the HTS code and the total US duty for common products from China, Vietnam, India, Mexico and the EU, rebuilt every week from the tariff schedule the U.S. International Trade Commission publishes.

Where the numbers come from

• Sold prices come from sold listings on Vinted's public marketplace. Each result links the individual sales it was built from.
• Duty rates come from the Harmonized Tariff Schedule of the United States (USITC), including the Chapter 99 headings for Section 301 and Section 232. Each layer names its heading and links to the official source.

We are not affiliated with Vinted or with any government agency. Tariff figures are information, not legal or customs advice: the duty owed is decided by U.S. Customs and Border Protection at entry.

What we do not do

No ads, no third-party trackers, no selling or sharing of data about visitors. See the privacy page for exactly what is kept.

Contact

Email contact@swanum.com. It is read by the person who builds the tools — corrections, questions and requests for something that is not here yet are all welcome.

The swan in our logo is "Swan breeze" by Lorc from game-icons.net, licensed under CC BY 3.0.