Central Bank Rates MCP Server — @allratestoday/central-bank-mcp

Give your AI assistant the official exchange rates that compliance, tax, and accounting actually require. A Model Context Protocol server that lets Claude Code, Cursor, Claude Desktop, Windsurf, and any MCP-compatible client fetch published central-bank and tax-authority rates from 60+ institutions — ECB, Fed, Bank of Japan, HMRC, US Treasury, and more — via the AllRatesToday API.

After installation, your assistant can answer questions like:

• "What is the ECB's official USD/EUR rate today?"
• "What HMRC rate should I use for this March invoice?"
• "Show me the Bank of Japan's official rate for every day of Q1."
• "Compare the official USD/LKR rate across every central bank that publishes one."

⚖️ Official rates vs mid-market rates

Everything this server returns is an official published rate: fixed once the institution publishes it, carrying that institution's own publication date — the number tax authorities, auditors, and customs require. It is not the live market rate. For live mid-market rates (price display, conversion, anything that should track the market), use the companion server @allratestoday/mcp-server. The two can diverge by several percent — pick by use case. Methodology: allratestoday.com/official-rates-methodology.

🚀 Why this server?

• 🏛️ 60+ official sources — central banks (ECB, Fed, BOJ, SNB, RBI, …) plus tax authorities (HMRC, US Treasury, …), each served from its own published tables
• 📅 Point-in-time correctness — ask for any date; weekends and holidays roll back to the rate legally in force, and the response tells you which publication date applied
• 📊 Cross-bank comparison — one call returns every institution's rate for a pair, with min/max/median and spread stats
• 🧮 Honest derivations — pairs a bank doesn't publish directly are cross-computed only within that bank's own table and flagged derived; banks are never mixed
• 🧰 Five focused tools — small surface, easy for the model to use correctly
• 🔌 Works everywhere MCP does — stdio transport, MCP 1.x; Claude Code, Cursor, Claude Desktop, Windsurf, or any generic host

🔑 Get your API key

The server will not start without a valid ALLRATES_API_KEY. A free key covers the latest published tables — no credit card required. Dated tables and history need a paid plan.

1. Register at allratestoday.com/register — 30 seconds
2. Verify your email
3. Copy your key from the dashboard (format: art_live_xxxxx)
4. Use it as ALLRATES_API_KEY in the configs below

📦 Installation

# Run without installing (recommended)
npx -y @allratestoday/central-bank-mcp

# Or install globally
npm install -g @allratestoday/central-bank-mcp
central-bank-mcp

Both commands launch the stdio MCP server and wait for a client to connect — your MCP client launches them as a subprocess.

🏁 Quick setup per client

Claude Code

claude mcp add central-bank-rates -- npx -y @allratestoday/central-bank-mcp
claude mcp env central-bank-rates ALLRATES_API_KEY=art_live_xxxxx

Restart Claude Code. Verify by asking:

... View full README on GitHub