USD/KRW Exchange Rate MCP Server

This project is a small Python FastMCP server that answers questions about the USD/KRW exchange rate.

It uses this Frankfurter API endpoint:

https://api.frankfurter.dev/v2/rate/USD/KRW

When a user asks things like "USD/KRW rate?", "dollar-won exchange rate?", or "How many Korean won is 1 dollar?", an MCP client can call this server's tools and return the live result.

Files

server.py         FastMCP server
requirements.txt Python dependencies
render.yaml      Render Blueprint configuration
README.md        Setup and deployment guide
READM.md         Short pointer to README.md

MCP Tools

get_usd_krw_exchange_rate

Returns the latest USD/KRW exchange rate as structured data.

Example result:

{
  "date": "2026-06-20",
  "base": "USD",
  "quote": "KRW",
  "rate": 1532.78,
  "source": "https://api.frankfurter.dev/v2/rate/USD/KRW"
}

answer_usd_krw_exchange_rate

Returns a user-friendly Korean sentence generated from the live API result.

The source code stores the Korean sentence template with Unicode escape sequences. This keeps server.py safe across Windows terminals, GitHub, and Render deployments.

Run Locally

1. Create a virtual environment

Windows PowerShell:

python -m venv .venv
.\.venv\Scripts\Activate.ps1

macOS/Linux:

python -m venv .venv
source .venv/bin/activate

2. Install dependencies

pip install -r requirements.txt

3. Start the MCP server

python server.py

Default local MCP endpoint:

http://localhost:8000/mcp

Health check endpoint:

http://localhost:8000/health

To use another port:

Windows PowerShell:

$env:PORT=9000
python server.py

macOS/Linux:

PORT=9000 python server.py

Deploy to Render

This repository includes render.yaml, so the easiest option is Render Blueprint deployment.

Option 1. Deploy with render.yaml

1. Push this project to a GitHub repository.
2. Open the Render dashboard.
3. Click New +.
4. Choose Blueprint.
5. Connect the GitHub repository.
6. Render will read render.yaml and create the web service.

After deployment, your MCP endpoint will look like this:

https://YOUR-RENDER-SERVICE.onrender.com/mcp

The health check endpoint will be:

https://YOUR-RENDER-SERVICE.onrender.com/health

Option 2. Create a Render Web Service manually

Use these settings:

Runtime: Python
Build Command: pip install -r requirements.txt
Start Command: python server.py
Health Check Path: /health

Render automatically provides the PORT environment variable. server.py reads that value and starts the server on the correct port.

MCP Client Setup

If your MCP client supports remote HTTP MCP servers, register this URL:

https://YOUR-RENDER-SERVICE.onrender.com/mcp

The exact client configuration depends on the MCP client you use. The important details are:

Transport: HTTP
Endpoint path: /mcp

API Source

• Frankfurter docs: https://frankfurter.dev/
• USD/KRW endpoint: https://api.frankfurter.dev/v2/rate/USD/KRW

No API key is required.