# Dutyfinch by CyberMax

> US tariff API and remote MCP server: HTS code lookup (description, general, special and column 2 rates, units), keyword search over the whole Harmonized Tariff Schedule, Section 301 China status for every code (lists 1, 2, 3, 4A, 4B, the 2024 four-year-review increases and product exclusions with end dates), the 2026 US–China tariff reduction flag, and webhook alerts when a watched code changes. Built from official USITC and Federal Register data.

Send an HTS code or product words and get the official US duty rates, whether Section 301 China tariffs apply (lists 1–4, the 2024 increases and exclusions), and the new US–China reduction flag the day its list is published. REST API and MCP server. 50 free calls a day; plans from $19/month.

## API (free tier without a key; paid API keys for more)
- [/api/hts](https://dutyfinch.cybermax-tools.workers.dev/api/hts?code=8516.60.40): Look up one HTS code (also GET /hts/{code})
- [/api/search](https://dutyfinch.cybermax-tools.workers.dev/api/search?q=coffee%20maker): Search the HTS by product words or a code prefix
- [/api/section301](https://dutyfinch.cybermax-tools.workers.dev/api/section301): Section 301 China lists: headings, rates, dates, counts
- [/api/china-deal](https://dutyfinch.cybermax-tools.workers.dev/api/china-deal?code=9503.00.00): 2026 US–China tariff reduction list: status and per-code flag
- [/api/watch](https://dutyfinch.cybermax-tools.workers.dev/api/watch): Pro: watch codes and get a webhook when a rate or China status changes
- GET for simple calls, POST a JSON body for lists. Same field names as the bulk version's dataset records.
- OpenAPI 3.1: https://dutyfinch.cybermax-tools.workers.dev/openapi.json

## MCP (remote, streamable HTTP, no auth)
- Endpoint: https://dutyfinch.cybermax-tools.workers.dev/mcp
- `lookup_hts_code`: US tariff lookup for one HTS code (4, 6, 8 or 10 digits): description, general/special/column 2 duty rates, Section 301 China list status with the additional rate, exclusions, and the 2026 US–China reduction flag.
- `search_hts`: Find US HTS codes from product words (e.g. "air fryer", "wooden toys") or a code prefix. Returns codes with description, general rate and Section 301 China summary.
- `section301_lists`: All Section 301 China tariff headings (lists 1, 2, 3, 4A, 4B, 2024 increases, exclusions) with rates, dates and code counts.
- `china_deal_status`: Status of the 2026 US–China tariff reduction list (pending / notice_published / published) and, with code, whether that HTS code is on it.

## Limits
- Free tier: 50 calls a day per IP, 20 a minute, no key. Paid keys from $19/month (see Get an API key).
- Rates and Section 301 lists come from the current USITC HTS revision (shown as release in every answer) and are refreshed when USITC publishes a new revision.
- Section 301 lists are set at 8 digits; send an 8- or 10-digit code for an exact answer. Product exclusions are matched to the 10-digit lines they name; read the product text to see if yours qualifies.
- General information, not legal or customs advice. Section 232, IEEPA, antidumping/countervailing duties and fees are not included; confirm with CBP or a licensed customs broker.
- Watch alerts (Pro): up to 100 codes per key, one https webhook, checked daily and on every new HTS revision.

## More
- Health: https://dutyfinch.cybermax-tools.workers.dev/health
- All CyberMax tools: https://cybermax-tools-cybermax.static.hf.space/
- Loop over your product list one code per call; an Importer key covers 2,500 calls a month, Broker 7,500 plus watch alerts on up to 100 codes, Team 40,000.

## Pricing
- Free: 50 calls a day per IP, 20/min, no key.
- Importer: $19/month, 2,500 calls a month, 30/min. Buy: https://dutyfinch.cybermax-tools.workers.dev/buy/importer?s=llms
- Broker: $49/month, 7,500 calls a month, 60/min. Buy: https://dutyfinch.cybermax-tools.workers.dev/buy/broker?s=llms
- Team: $149/month, 40,000 calls a month, 120/min. Buy: https://dutyfinch.cybermax-tools.workers.dev/buy/team?s=llms
- Pay as you go: $5, 500 calls (one-time pack, no expiry), 30/min. Buy: https://dutyfinch.cybermax-tools.workers.dev/buy/payg?s=llms
- Importer yearly: $190/year, 2,500 calls a month, 30/min. Buy: https://dutyfinch.cybermax-tools.workers.dev/buy/importer-yearly?s=llms
- Broker yearly: $490/year, 7,500 calls a month, 60/min. Buy: https://dutyfinch.cybermax-tools.workers.dev/buy/broker-yearly?s=llms
- Team yearly: $1,490/year, 40,000 calls a month, 120/min. Buy: https://dutyfinch.cybermax-tools.workers.dev/buy/team-yearly?s=llms
- Using several CyberMax APIs? CyberMax API All-Access: one key for all 9 APIs (this one included, 2,500 calls a month here) for $119/month. https://api-all-access.cybermax-tools.workers.dev/
- Use the key as `x-api-key: KEY` or `Authorization: Bearer KEY` (MCP too). Usage: https://dutyfinch.cybermax-tools.workers.dev/key. Machine-readable: https://dutyfinch.cybermax-tools.workers.dev/pricing.json