reference data for Claude.ai

dev.usaref/reference-data

N American govt data, cited to source: rates, VAT, tax, wages, holidays, FX. 10 countries; USA free.

client:Claude.ai transport:streamable-http tools:11

Install reference data in Claude.ai

Settings → Connectors → Add custom connector

https://usaref.dev/mcp

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

list_series
get_public_holidays
get_series
get_series_history
check_minimum_wage
compute_vat
count_working_days
settlement_date
compute_income_tax
compute_employment_cost
get_snapshot

reference data in other clients

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

reference data MCP server