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MCP Currency Converter in Cline

ECB reference rates with the rate date on every answer. It caches the European Central Bank's daily and historical euro reference rates, converts between any currencies the ECB quotes through EUR cross rates, and emits the exact fx_rates object the expense tracker needs to rebill a project in one currency.

Every tool here except license_activate is a read, so this is the one server whose whole tool list is safe in autoApprove. The only network destination is the ECB, and nothing about your amounts leaves the machine.

What you get in Cline

You say	Tool
What is 4,500 EUR in USD today?	`convert`
What was the GBP rate on 30 August?	`rate_on`
Rebill Nova in USD using today's rates.	`fx_rates_for then expense_to_invoice`

Counted from the published history file: the ECB series runs 1999-01-04 to 2026-09-02, 10,104 calendar days holding 7,084 dates, so 29.9% of dates carry no rate. Every answer names the rate date it actually used.

Install it in Cline

The file is mcp.json, and the key inside it is mcpServers.

Scope	Path
Cline CLI	`~/.cline/mcp.json`
The editor extension	`opened from the Cline panel, not by path; the documentation deliberately calls it the MCP settings JSON used by the extension`

If you also run Claude Desktop, the shortest path there is one click: currency.mcpb from the bundle catalog opens as an extension, with no JSON and no terminal. Cline reads its own config, so here it is:

The config block:

{
  "mcpServers": {
    "currency": {
      "command": "node",
      "args": ["/absolute/path/to/mcp-servers/servers/currency/dist/index.js"],
      "disabled": false,
      "autoApprove": []
    }
  }
}

The node command above wants a built file. From a clone, once:

git clone https://github.com/theluckystrike/mcp-servers.git
cd mcp-servers && npm install
npm run build -w packages/mcp-license -w servers/currency

That writes servers/currency/dist/index.js, and its absolute path is the one argument the config needs.

The npm packages are not published yet, so the form below returns a 404 today. It is here because it is what the entry becomes the day the publish lands, with nothing else changed:

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

No full-app restart. The MCP settings actions include restarting an unresponsive server if its tools do not appear.

Nothing is published to npm yet, so the working install paths are the ones above: the .mcpb bundle from the bundle catalog, a clone and build, or the hosted URL.

No install: the hosted endpoint

The same server runs at https://mcp.zovo.one/mcp/currency over MCP streamable HTTP, no install. Mint a free token with curl https://mcp.zovo.one/mcp/token, or use a Pro key. It has no filesystem, so a file comes back as a one-hour download link.

Write the transport in. Omitting type falls back to the legacy sse transport, which will not talk to this endpoint:

{
  "mcpServers": {
    "currency": {
      "type": "streamableHttp",
      "url": "https://mcp.zovo.one/mcp/currency",
      "headers": { "Authorization": "Bearer <token>" }
    }
  }
}

Cline notes worth knowing first

Cline is the one client here with an unsafe transport default. `type` selects it, and omitting `type` falls back to the legacy sse transport, so a streamable HTTP endpoint needs it written in or you will debug a server that is fine. Local entries carry "disabled" and an "autoApprove" array.

Free: latest rates, convert, convert_many, fx_rates_for, history windows up to 90 days. Pro is $19 once, verified offline.

Questions

Where does the config live?

The CLI reads ~/.cline/mcp.json. For the extension, do not hunt for a path: MCP Servers icon, Configure tab, Configure MCP Servers. cline mcp opens a wizard, and cline config mcp --json is the non-interactive form.

The hosted endpoint will not connect.

Set the transport explicitly. Omitting type falls back to the legacy sse transport, so streamable HTTP needs "type": "streamableHttp" written in.

Should I auto-approve MCP Currency Converter's tools?

Approve the read-only ones and leave the writing ones behind a click: each entry carries an autoApprove array and a disabled flag.

MCP Currency Converter in detail · The same server in Windsurf and Claude.ai and Claude Desktop connectors · Every server in Cline · Guides · Cline docs · Buy Pro

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