Dutyfinch MCP Server

by workers-cybermax-tools-cybermax Your server? Claim it

answering

Dutyfinch is answering right now. Last checked 4 min ago. It exposes 4 tools.

US tariff API + MCP: HTS duty rates, Section 301 lists. Keys $19/mo; 50 free calls a day.

Uptime history 15 days of history

15 days agonow

100.0%

Uptime 24h

178 of 178 checks

Tools

read from the server

87 ms

Response time

average over 24h

open, no key

Access

streamable-http

Nothing serious here today

Today is the operative word: we check Dutyfinch every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 4 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add dutyfinch --transport http https://dutyfinch.cybermax-tools.workers.dev/mcp?via=mcp-registry

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "dutyfinch": {
      "url": "https://dutyfinch.cybermax-tools.workers.dev/mcp?via=mcp-registry"
    }
  }
}

~/.codex/config.toml

[mcp_servers.dutyfinch]
url = "https://dutyfinch.cybermax-tools.workers.dev/mcp?via=mcp-registry"

.cursor/mcp.json

{
  "mcpServers": {
    "dutyfinch": {
      "url": "https://dutyfinch.cybermax-tools.workers.dev/mcp?via=mcp-registry"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "dutyfinch": {
      "url": "https://dutyfinch.cybermax-tools.workers.dev/mcp?via=mcp-registry"
    }
  }
}

This server publishes 1 more address. The block above uses the one we reach during checks; the full list is under Endpoints below, and the author may intend a particular one for your client.

Available tools 4

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

china

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.

hts

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.

lookup

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.

section301

section301_lists

All Section 301 China tariff headings (lists 1, 2, 3, 4A, 4B, 2024 increases, exclusions) with rates, dates and code counts.

Endpoints

URL	Transport	State	Latency	Checked
https://dutyfinch.cybermax-tools.workers.dev/mcp?via=mcp-registry	streamable-http	answering	78 ms	4 min ago
https://dutyfinch.cybermaxtools.com/mcp?via=mcp-registry	streamable-http	answering	77 ms	4 min ago

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Dutyfinch — questions

Answers built from our own checks of this server.

What can Dutyfinch do?

It exposes 4 tools, read directly from the server on our last check. Among them: china_deal_status, lookup_hts_code, search_hts, section301_lists. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Dutyfinch working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 178 of 178 checks got a reply (100.0%), average response time 87 ms. The bar chart above shows every period we have measured.

How do I connect Dutyfinch?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Dutyfinch need an API key?

No. Dutyfinch completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 4 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Dutyfinch?

It answers our handshake in 87 ms on average, which is faster than 88% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.