> ## Documentation index
> Fetch the complete documentation index at: https://docs.htspilot.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Changelog

> Dated versions of the HTS Pilot API and what changed in each.

Each entry is a dated record of the published contract: the OpenAPI document as it was on that day. The service always runs the latest version ([Versioning and changes](/versioning.md)). The list under an entry is generated from the difference between its document and the one before.

## 2026-10-03

**The history starts here**

The first recorded version of the API, with three import markets (`US`, `EU`, `VN`): 55 operations for lookups,
review, batches, the SKU catalog, tariff data, usage, webhooks, reports and system status. Every answer carries
`X-Request-ID` and every error a `code` ([Request identifiers](/request-identifiers.md),
[Errors](/errors.md#error-codes)). The history starts here; earlier changes were not recorded. One of them is
described in [Languages](/languages.md): the questions, the missing information and the legal findings of a lookup
follow the language of the lookup, set with `language` on a classify request.

The history starts here: there is no earlier version to compare with.