---
title: "Section 301 China lists: headings, rates, dates, counts"
method: POST
path: "/api/section301"
tags: ["Dutyfinch"]
---

# Section 301 China lists: headings, rates, dates, counts

`POST /api/section301`

## Request

- Base URL: `https://dutyfinch.cybermaxtools.com`
- URL: `https://dutyfinch.cybermaxtools.com/api/section301`
- Auth: one of:
  - none
  - API key in header `x-api-key`
  - HTTP bearer

Every Section 301 heading in Chapter 99 (lists 1, 2, 3, 4A, 4B, the 2024 four-year-review increases and the exclusion headings) with the official rate text, effective dates and how many codes each covers.

## Request body

- object

## Response `200`

Results (same field names as the bulk version's dataset records) plus the free-tier limits.

- object

## Other responses

- `400`: Invalid input
- `401`: Invalid or revoked API key
- `429`: Free tier used up (50/day per IP) or rate/plan limit reached; the body has an upgrade link.
- `504`: Took too long; ask for fewer items

---

[API](https://skmtc.dev/cybermaxtools/apis/dutyfinch-api.md) · [All operations](https://skmtc.dev/cybermaxtools/apis/dutyfinch-api/llms.txt) · [OpenAPI document](https://skmtc.dev/cybermaxtools/apis/dutyfinch-api/revisions/e333c51ba697?raw)