Realtime Exchange Rate MCP

Give your AI coding assistant a live window into the foreign-exchange market.

A Model Context Protocol server that lets Claude Code, Cursor, Claude Desktop, Windsurf, and any other MCP-compatible client fetch real-time currency rates, historical data, and multi-currency lookups.

What it does

After installation, your assistant can answer questions like:

• "What's the current USD to EUR rate?"
• "Show me how GBP/JPY moved over the last 30 days."
• "Convert 250 USD into CAD at a real rate."
• "Compare USD against EUR, GBP, and JPY simultaneously."
• "List every supported currency."

Tools exposed

• get_exchange_rate — current mid-market rate between two currencies
• get_historical_rates — time-series data over 1d / 7d / 30d / 1y
• get_rates_authenticated — multi-currency batch lookup
• list_currencies — full list of 160+ supported ISO 4217 codes

Get an API key

The server requires ALLRATES_API_KEY. A free key is enough for development and personal use — no credit card required.

1. Register at allratestoday.com/register
2. Verify your email
3. Copy your key (format: art_live_xxxxx) from your dashboard

Install (Claude Code)

claude mcp add allratestoday -- npx -y @allratestoday/mcp-server
claude mcp env allratestoday ALLRATES_API_KEY=art_live_xxxxx

Install (Cursor / Claude Desktop / Windsurf)

Edit your client's MCP config:

{
  "mcpServers": {
    "allratestoday": {
      "command": "npx",
      "args": ["-y", "@allratestoday/mcp-server"],
      "env": {
        "ALLRATES_API_KEY": "art_live_xxxxx"
      }
    }
  }
}

Source code

- npm: https://www.npmjs.com/package/@allratestoday/mcp-server
- GitHub: https://github.com/cahthuranag/realtime-exchange-rate-mcp
- License: MIT
- Currencies: 160+ ISO 4217 codes
- Update frequency: ~60 second mid-market rate refresh
- Data source: Reuters / Refinitiv interbank feeds