ref_country — Duo Data Utilities MCP Tool
ref_country
(ref country) is one of 31 tools on the
Duo Data Utilities
MCP server. Connect the server and your client discovers it on the handshake.
by client
How to call ref_country from your client
- Claude Code Duo Data Utilities ref_country run in your project directory
- Claude Desktop Duo Data Utilities ref_country ~/Library/Application Support/Claude/claude_desktop_config.json
- Cursor Duo Data Utilities ref_country ~/.cursor/mcp.json
- VS Code Duo Data Utilities ref_country .vscode/mcp.json
- Zed Duo Data Utilities ref_country ~/.config/zed/settings.json
- Windsurf Duo Data Utilities ref_country ~/.codeium/windsurf/mcp_config.json
- Cline Duo Data Utilities ref_country ~/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json
- Gemini CLI Duo Data Utilities ref_country ~/.gemini/settings.json
- Grok Duo Data Utilities ref_country .mcp.json (in your project root)
- ChatGPT Duo Data Utilities ref_country Settings → Connectors → Advanced → Developer mode
- Claude.ai Duo Data Utilities ref_country Settings → Connectors → Add custom connector
- LangChain Duo Data Utilities ref_country pip install langchain-mcp-adapters
Fastest route
claude mcp add --transport http data-utilities https://api.duoleads.com/mcpOther tools on this server
- id_national
- id_gs1
- id_security
- time_zone
- time_dst
- time_business-days
- time_rrule
- time_calendar
- text_slug
- text_transliterate
- text_unicode
- text_similarity
- code_url
- code_idn
- code_semver
- code_hash
- code_jwt
- geo_geohash
- geo_pluscode
- geo_polygon
- geo_distance
- chain_address
- chain_selector
- ref_nuts
- ref_airport
- ref_currency
- num_radix
- num_words
- num_stats
- num_allocate
This list was read from the server itself, by connecting to it and calling tools/list on 29 September 2026. It is what
the server actually exposes, not what its listing claims.
Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. The registry stores tool names only; connect the server for its live schemas.