Dutyfinch for Claude.ai

dev.workers.cybermax-tools.cybermax/dutyfinch

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

client:Claude.ai transport:streamable-http tools:4

Install Dutyfinch in Claude.ai

Settings → Connectors → Add custom connector

https://dutyfinch.cybermaxtools.com/mcp?via=mcp-registry

Claude on the web takes a remote URL and completes OAuth in the browser. For a packaged server use Claude Desktop or Claude Code instead. Claude.ai docs

What Claude.ai can do once it is connected

lookup_hts_code
search_hts
section301_lists
china_deal_status

Dutyfinch in other clients

Claude Code
Claude Desktop
Cursor
VS Code
Zed
Windsurf
Cline
Gemini CLI
Grok
ChatGPT
LangChain

Dutyfinch MCP server