IFG MCP Server

International tax research for Claude — 213 jurisdictions, 500K+ legal documents.

Search tax legislation, treaties, case law, and administrative doctrine directly from Claude Desktop or Claude Code.

Quick Start

Claude Desktop

Add to your claude_desktop_config.json:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "ifg-tax": {
      "command": "npx",
      "args": ["-y", "ifg-mcp-server"],
      "env": {
        "IFG_API_KEY": "sk-ifg-your-key-here"
      }
    }
  }
}

Restart Claude Desktop. You'll see 3 new tools available.

Claude Code

claude mcp add ifg-tax -- npx -y ifg-mcp-server

Then set your API key in environment:

export IFG_API_KEY="sk-ifg-your-key-here"

Get Your API Key

1. Go to ifg.tax/dashboard
2. Sign in to your IFG account
3. Navigate to API Keys section
4. Generate a new key (format: sk-ifg-...)

Available Tools

search_tax_law

Semantic search across all tax legislation, regulations, case law, and doctrine.

Parameters:

• query (required) — Natural language tax question
• countries — ISO-2 country codes to filter (e.g. ["FR", "DE"])
• tags — Fiscal domain filter: vat, cit, pit, wht, treaty, transfer_pricing, holding, rd_incentive, capital_gains, inheritance, expat, pe, compliance, crypto, dst, payroll
• limit — Number of results (1-20, default 8)

Example prompt: "What is the corporate tax rate in France for 2026?"

get_tax_treaty

Find bilateral tax treaty provisions between two countries.

Parameters:

• country_a (required) — First country ISO-2 code
• country_b (required) — Second country ISO-2 code
• topic — Specific article topic (e.g. "dividends", "interest", "royalties")

Example prompt: "What is the withholding tax rate on dividends under the France-Germany tax treaty?"

compare_tax_regimes

Compare tax rules across multiple jurisdictions side by side.

Parameters:

• topic (required) — Tax topic to compare
• countries (required) — 2-8 ISO-2 country codes

Example prompt: "Compare the participation exemption for dividends in France, Netherlands, Luxembourg, and Ireland"

Coverage

• 213 jurisdictions worldwide
• 500K+ legal text chunks (laws, treaties, case law, doctrine)
• Sources: Official government sites (.gov), OECD, EU, courts, national tax authorities
• Updated daily via automated ingestion pipeline

Requirements

• Node.js 20+
• IFG subscription (ifg.tax/pricing)

License

MIT