Dutyfinch for Grok
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:Grok
transport:streamable-http
tools:4
Install Dutyfinch in Grok
.mcp.json (in your project root)
{
"mcpServers": {
"dutyfinch": {
"type": "http",
"url": "https://dutyfinch.cybermaxtools.com/mcp?via=mcp-registry"
}
}
}
Grok Build reads Claude Code's .mcp.json and Claude Desktop's config unchanged, so a server you have already set up there needs nothing new. The Grok web app and X integration do not take custom servers. Grok docs