# Fixer.io — MCP server on mcp.ai
> Connect your Fixer.io account and use 5 tools for developer tools straight from your AI agent. Connect with your own API key. Fixer.io is a simple and lightweight API for current and historical foreign exchange rates and currency conversion.

By: mcp.ai · official
Page: https://mcp.ai/fixer_io

## Connect (MCP protocol)
Remote MCP endpoint (HTTP, streamable): https://api.mcp.ai/p_fixer_io?ms=1787291340000
Add it as a custom/remote MCP connector, then authenticate when prompted.

## REST API (no MCP client required)
Every tool is also a REST endpoint, authed with a workspace API key.
Discover: GET https://api.mcp.ai/api/fixer_io/_endpoints   # public; lists every endpoint
Call:     POST https://api.mcp.ai/api/fixer_io/<endpoint>
  Authorization: Bearer sk_live_…   # create one at https://mcp.ai/settings/api-keys
  Content-Type: application/json
  Body: { …args }   →   { "ok": true, "tool": "<id>", "result": { … } }

## Developer docs
How to use (MCP or REST), markdown: https://mcp.ai/fixer_io/skill.md
Postman collection (v2.1): https://mcp.ai/fixer_io/postman.json

## Tools
- fixer_io_convert_currency(date?: string, amount: number, to_currency: string, from_currency: string) — Tool to convert an amount from one currency to another. Use when you need current or historical exchange rates. Specify `date` for historical rates.
- fixer_io_get_fluctuation(base?: string, symbols?: string, end_date: string, start_date: string) — Tool to fetch exchange rate fluctuations between two dates. Use when you need day-to-day currency rate changes.
- fixer_io_get_historical_rates(base?: string, date: string, symbols?: string) — Fetch historical exchange rates for a specific date. Returns end-of-day (EOD) exchange rates for any date back to January 1, 1999. Use this when you need past currency conversion rates or historical f
- fixer_io_get_supported_symbols(callback?: string) — Tool to retrieve the list of all available currency symbols and their corresponding names. Use when you need to fetch and display supported currency codes.
- fixer_io_get_time_series(base?: string, symbols?: string, end_date: string, start_date: string) — Retrieves daily foreign exchange rates for a date range. Returns a time series of exchange rates for each day between start_date and end_date (inclusive, max 365 days). The rates show how much of each

## Example prompts
- "What can I do in Fixer.io?"
- "Show me a summary of my Fixer.io account"

## Links
Docs: https://mcp.ai/docs/mcps/fixer_io
Website: https://mcp.ai/mcps/fixer_io