The Dutyfinch MCP server,
connected in one click.
US tariff API + MCP: HTS duty rates, Section 301 lists. Keys $19/mo; 50 free calls a day. Connect the official Dutyfinch MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.
Free to start · No credit card · No hosting needed
Add Dutyfinch to your AI in one minute
Pick your client. Copy, paste, done — or let gate handle sign-ins and policies for you.
claude mcp add --transport http dutyfinch https://dutyfinch.cybermax-tools.workers.dev/mcp?via=mcp-registryRun in your terminal, then restart Claude Code.
Dutyfinch · https://dutyfinch.cybermax-tools.workers.dev/mcp?via=mcp-registry
What your AI can do with Dutyfinch
Real prompts you can type the moment it's connected — no setup, no docs to read.
“Use “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 wi.”
“Use “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 Se.”
“Use “section301_lists”: All Section 301 China tariff headings (lists 1, 2, 3, 4A, 4B, 2024 increases, exclusions) with rates, dates and code counts.”
“Use “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.”
How secure is the Dutyfinch MCP server?
Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how Dutyfinch holds up.
Security grade A
gate scanned 4 tools on Oct 1, 2026 for prompt injection and risky tool definitions — nothing to flag.
Official endpoint
Operated by Dutyfinch (workers.dev) at its documented MCP endpoint — not a third-party mirror or community re-host.
No sign-in needed
This server only exposes public data — no account and no credentials are involved when you connect.
Scanned before it goes live
gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.
Watched for drift
If Dutyfinch adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.
Connected in three steps
Connect your gate
Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.
Pick Dutyfinch
Choose Dutyfinch in the gate directory. No sign-in needed.
Use it anywhere
Dutyfinch's tools are live in every AI client you've connected — with rules and logging built in.
Free to start · No credit card · No hosting needed
The actual tools Dutyfinch exposes
Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.
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 wi
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 Se
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.
Who runs the Dutyfinch MCP server?
The Dutyfinch MCP server at a glance
https://dutyfinch.cybermax-tools.workers.dev/mcp?via=mcp-registryQuestions, answered
Is there an official Dutyfinch MCP server?
Yes — Dutyfinch operates its own remote MCP server at dutyfinch.cybermax-tools.workers.dev. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.
How do I connect Dutyfinch to Claude or ChatGPT?
Add gate's gateway URL to your AI client once, then pick Dutyfinch in the directory. No account or sign-in is needed. From then on, Dutyfinch's tools are available in every client you've connected to gate.
Do I need to host anything?
No. Dutyfinch runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.
Is the Dutyfinch MCP server safe to connect?
It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.
Is it free?
Yes — you can get started with gate for free and connect Dutyfinch in minutes. No credit card required.
Connect more than just Dutyfinch
Every server below works through the same gateway URL — connect once, add tools anytime.
Squarespace DomainsDesignView →Set up Dutyfinch in: Claude · Claude Code · ChatGPT · Cursor · VS Code