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fxrates

fxrates

Local
github.com/CloudCorpRecordsFinance0Updated 1w ago
Repository

About fxrates

fxrates provides CLI and MCP access to Frankfurter foreign-exchange data without an API key. It retrieves currencies and current or historical rates, and calculates conversions locally from fetched rates.

Key features

  1. 01List supported currencies
  2. 02Retrieve latest exchange rates
  3. 03Fetch rates for dates or ranges
  4. 04Convert currencies using fetched rates
  5. 05Run as a CLI or stdio MCP server

Use cases

  1. 01Check the latest rate for selected currencies
  2. 02Review exchange rates for a past date or period
  3. 03Convert an amount at current or historical rates

MCP support

The stdio MCP server exposes tools for supported currencies, current and historical rates, and currency conversions. It connects to Frankfurter and can use an overridden API base URL.

Configuration

Local server config is the same for every client. Copy it into your client’s MCP config file.

mcp.json · Universal config
{
  "mcpServers": {
    "cloudcorprecords-fxrates": {
      "command": "npx",
      "args": [
        "-y",
        "@reneturcios/fxrates"
      ]
    }
  }
}
Run commandnpx -y @reneturcios/fxrates

Local servers need a runtime on your machine (e.g. Node.js 18+). Config file locations differ by client; see your client’s docs.

Packages
npm@reneturcios/fxrates0.1.0
ocighcr.io/cloudcorprecords/fxrates:0.1.0

Tools

6

Saved tool list · updated 1w ago

This tool takes no parameters.

Details

From the project README

fxrates

fxrates reads foreign-exchange data from the Frankfurter API: which currencies are supported, what the latest rates are, what the rates were on a single past date or across a range, and conversions between currencies worked out locally from the fetched rate. One binary serves a command-line interface and a stdio MCP server.

No API key is needed. The service is keyless, so fxrates works with nothing configured. The API base URL can be overridden with FRANKFURTER_API_URL; when it is not set, calls go to https://api.frankfurter.dev/v1.

Install

npx @reneturcios/fxrates currencies

Or run the container image:

docker run -i ghcr.io/cloudcorprecords/fxrates

The container defaults to the MCP server (see below). Pass CLI arguments to use it as a CLI instead.

CLI

fxrates currencies
fxrates latest --base USD --symbols EUR,GBP
fxrates convert 25 EUR USD
fxrates historical 2024-05-01 --base EUR --symbols USD
fxrates range 2024-05-01 2024-05-03 --base EUR
fxrates convert-on 2020-01-02 100 USD EUR
fxrates greet Ada

fxrates --version

Rate commands print the upstream JSON payload. Conversions print a JSON object with amount, from, to, rate, converted, and date when the API supplies one. Exit codes: 0 on success, 1 when a call fails (including an upstream API error), 2 for usage errors.

Conversions are computed locally: the tool fetches the single rate it needs and multiplies. The result is trimmed to at most six decimal places by rounding at the sixth place; no fee, spread, or extra rounding is applied.

MCP server

One bin serves both faces. The mcp subcommand starts a stdio MCP server:

npx -y @reneturcios/fxrates mcp

MCP client configuration:

{
  "mcpServers": {
    "fxrates": {
      "command": "npx",
      "args": ["-y", "@reneturcios/fxrates", "mcp"]
    }
  }
}

To point the server at a different Frankfurter-compatible host, add FRANKFURTER_API_URL to the client's env for this server.

Tools
ToolInputWhat it returns
get_supported_currencies(none)The map of supported currency codes to names.
get_latest_exchange_ratesbase, symbols (both optional)The latest rates payload.
convert_currency_latestamount, from, to (all required)A conversion at the latest rate: amount, pair, rate, converted value, and date.
get_historical_exchange_ratesdate or start_date/end_date, plus optional base, symbolsRates for one date or a range.
convert_currency_specific_datedate, amount, from, to (all required)A conversion at that date's rate.
greetname (optional)A greeting string. Present for internal testing.

Dates use YYYY-MM-DD. symbols is a comma-separated list such as USD,GBP. Currency arguments are codes such as EUR and USD.

Development

npm install
npm run build   # tsc -> dist/
npm test        # node test runner over test/*.test.ts, no network (fake fetch fixtures)
npm run dev     # run the CLI from source via tsx

License

MIT — see LICENSE.

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