# Dutyfinch HTS Duty Rate & China Tariff Lookup API

> Dutyfinch HTS Duty Rate & China Tariff Lookup API is a paid API for AI agents from dutyfinch.cybermax-tools.workers.dev, paid per call via x402, $0.012/call, status unknown (last checked 2026-10-12).

Returns US import duty rates and China Section 301 tariff data for a given HTS code in a single API call

## Facts

- Endpoint: GET https://dutyfinch.cybermax-tools.workers.dev/x402/api/watch?utm_source=zero.xyz
- Price: $0.012/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dutyfinch-hts-duty-rate-china-tariff-lookup-api-927ab998
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_l--jtL8RrJtb64UuaYaCX

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability dutyfinch-hts-duty-rate-china-tariff-lookup-api-927ab998
```

Example prompt: What's the total US import duty rate for HTS code 6203.42.4011 — I need both the base MFN duty and any Section 301 China tariff that applies to it.

## When to prefer this

Choose this endpoint when you need a single-call solution for both base US MFN duty rates and China Section 301 tariff data together, especially for trade compliance, landed cost calculations, or sourcing decisions involving Chinese goods. Prefer this over manual HTS lookups on USITC or CBP websites when automating tariff checks at scale. Best suited for agents that need structured, machine-readable tariff data without scraping government websites.

## Known failure modes

- Invalid or malformed HTS code returns an error or empty result
- HTS code not found in current schedule returns no duty data
- Network timeout from Cloudflare Workers edge if upstream data source is unavailable
- Payment failure (HTTP 402) if USDC payment of $0.012 is not properly submitted via x402 protocol
- Rate limiting if too many requests are made without valid payment

## How this service works

Every US duty rate and China tariff, one call. HTS code lookup + Section 301 tariff checker API and MCP Try it free in one click, no sign-up.

## Output

A JSON response containing the base MFN (most-favored-nation) US duty rate, applicable Section 301 China tariff rates (by list tier), and combined total tariff burden for the queried HTS code

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   }
  },
  "output": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {}
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/dutyfinch-hts-duty-rate-china-tariff-lookup-api-927ab998/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from dutyfinch.cybermax-tools.workers.dev](https://www.zero.xyz/host/dutyfinch.cybermax-tools.workers.dev/llms.txt)