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Dutyfinch

by cybermax.cybermax-tools.workers.dev · remote · no sign-in to list tools · v1.1.2 · published by dev.workers.cybermax-tools.cybermax

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

Changes · 2
CompareRegistry entry

4 tools: 2 change things and 2 only read.

Scanned Oct 21, 2026

2 checks matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http dutyfinch https://dutyfinch.cybermaxtools.com/mcp?via=mcp-registry

Findings

Matches of fixed checks, with the text they matched.

2 warn
  • Warnlookup_hts_code

    The server marks "lookup_hts_code" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "lookup_hts_code" says "lookup": a word for reading.

    What this check looks for
  • Warnchina_deal_status

    The server marks "china_deal_status" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "china_deal_status" says "status": a word for reading.

    What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

4 tools

Changes things 2Claude Code: ask
  • china_deal_statusStatus of the 2026 US–China tariff reduction list (pending / notice_published / published) and, with code, whether that HTS code is on it.1 finding

    Why it is in this group

    • The name "china_deal_status" says "status": a word for reading.
    • The input takes a statement or command to run (input.code), which can change anything it can reach.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "china_deal_status" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "china_deal_status" says "status": a word for reading.

      What this check looks for
    Description, as the server wrote it
    Status of the 2026 US–China tariff reduction list (pending / notice_published / published) and, with code, whether that HTS code is on it.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: true
    • idempotentHint: true
    • destructiveHint: false
  • lookup_hts_codeUS 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 …1 finding

    Why it is in this group

    • The name "lookup_hts_code" says "lookup": a word for reading.
    • The input takes a statement or command to run (input.code), which can change anything it can reach.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "lookup_hts_code" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "lookup_hts_code" says "lookup": a word for reading.

      What this check looks for
    Description, as the server wrote it
    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.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: true
    • idempotentHint: true
    • destructiveHint: false
Only reads 2Claude Code: allow
  • search_htsFind US HTS codes from product words (e.g.No findings

    Why it is in this group

    • The name "search_hts" says "search": a word for reading.
    Description, as the server wrote it
    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.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: true
    • idempotentHint: true
    • destructiveHint: false
  • section301_listsAll Section 301 China tariff headings (lists 1, 2, 3, 4A, 4B, 2024 increases, exclusions) with rates, dates and code counts.No findings

    Why it is in this group

    • The name "section301_lists" says "list": a word for reading.
    Description, as the server wrote it
    All Section 301 China tariff headings (lists 1, 2, 3, 4A, 4B, 2024 increases, exclusions) with rates, dates and code counts.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: true
    • idempotentHint: true
    • destructiveHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.1.2. Values in angle brackets are yours to fill in.

claude mcp add --transport http dutyfinch https://dutyfinch.cybermaxtools.com/mcp?via=mcp-registry

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__dutyfinch__search_hts",
      "mcp__dutyfinch__section301_lists"
    ],
    "ask": [
      "mcp__dutyfinch__lookup_hts_code",
      "mcp__dutyfinch__china_deal_status"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as dutyfinch. Review it before you use it.