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Frankfurter MCP Server

by lineofflight Your server? Claim it
answering

Frankfurter is answering right now. Last checked 8 min ago. It exposes 4 tools. Last commit 17 Sep 2026.

Convert currencies and fetch blended FX rates from 50+ institutional sources.

Uptime history 52 days of history · worst day 96%
52 days agonow
96.7%
Uptime 24h
88 of 91 checks
4
Tools
read from the server
100 ms
Response time
average over 24h
3
Stars
last commit 17 Sep 2026

What changed 10

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 10 September 2026. No other catalogue keeps this.

23 Sep 2 tools changed the parameters they ask for convert, get_rates
23 Sep a tool changed version
23 Sep a tool description was rewritten get_rates
10 Sep 2 tools changed the parameters they ask for convert, get_rates
10 Sep 2 tool descriptions were rewritten convert, get_rates
10 Sep a tool appeared list_providers
10 Sep a tool changed version

Frankfurter does not always answer

Over the last week it answered 98.3% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 8 min ago.

run in your terminal
claude mcp add frankfurter --transport http https://mcp.frankfurter.dev/
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "frankfurter": {
      "url": "https://mcp.frankfurter.dev/"
    }
  }
}
~/.codex/config.toml
[mcp_servers.frankfurter]
url = "https://mcp.frankfurter.dev/"
.cursor/mcp.json
{
  "mcpServers": {
    "frankfurter": {
      "url": "https://mcp.frankfurter.dev/"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "frankfurter": {
      "url": "https://mcp.frankfurter.dev/"
    }
  }
}

Available tools 4

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

convert
convert
Convert an amount from one currency to another. Returns {amount, currency} rounded to the target's minor units. Upstream rounds rates per direction; for low-value sources, flip via `get_rates` for more precision. Pass `provider` to use one institution's published rate, e.g. UST for a U.S. Treasury reporting rate.
currencies
list_currencies
List all supported ISO 4217 currency codes and their full names (e.g. { 'USD': 'United States Dollar' }).
providers
list_providers
List the institutions whose rates Frankfurter relays, with key, rate type, frequency (daily, monthly or quarterly) and coverage dates. Use a key as `provider` in `convert` or `get_rates` for that institution's published rates instead of the blend.
rates
get_rates
Latest or a single day's exchange rates. The raw-rate companion to `convert`. With `provider`, published rates from one or more institutions: on its own base the digits are as published, with the date they took effect.

Endpoints

URLTransportStateLatencyChecked
https://mcp.frankfurter.dev/ streamable-http answering 105 ms 8 min ago

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Frankfurter — questions

Answers built from our own checks of this server.

What can Frankfurter do?
It exposes 4 tools, read directly from the server on our last check. Among them: convert, get_rates, list_currencies, list_providers. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is Frankfurter working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 88 of 91 checks got a reply (96.7%), average response time 100 ms. The bar chart above shows every period we have measured.
How do I connect Frankfurter?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Frankfurter need an API key?
No. Frankfurter completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 4 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Frankfurter?
It answers our handshake in 100 ms on average, which is faster than 91% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is Frankfurter open source?
We cannot say either way: written in TypeScript and 3 stars on GitHub, but we could not determine the licence, and without one the code is not open source by default.