io.github.cyanheads/exchange-rates-mcp-server
exchange-rates-mcp-server
Convert currencies, get FX rates, and query historical ECB exchange rate data.
alive probed 2026-10-05 · HTTP 200
7tools
3.3ktokens in Claude Opus 5.5
3.4ktokens in Claude Code
1.7 %of a 200k context window
1.9ko200k_base estimate
275 msto initialize
66 msto list tools
- Endpoint
- https://exchange-rates.caseyjhand.com/mcp (streamable-http)
- Host
- exchange-rates.caseyjhand.com
- Protocol
- 2025-11-25
- Reports itself as
- exchange-rates-mcp-server 0.4.2
- Capabilities
- logging, prompts, resources, tools
- Instructions
- 642 characters
- Claude count
- Claude Opus 5.5, measured 2026-10-05. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/cyanheads/exchange-rates-mcp-server
- Registry
- active, updated 2026-10-04 · registry entry
- Reachable
- 6 of the last 6 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| fx_get_timeseries | 490 | 25 % |
| fx_dataframe_query | 320 | 17 % |
| fx_get_rates | 308 | 16 % |
| fx_get_rate | 283 | 15 % |
| fx_convert_currency | 258 | 13 % |
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-10-05 14:38 | alive | 275 ms | 7 | 3.3k | 1.9k |
| 2026-10-05 00:33 | alive | 171 ms | 7 | 1.9k | |
| 2026-10-04 10:04 | alive | 323 ms | 7 | 1.9k | |
| 2026-10-04 07:57 | alive | 382 ms | 7 | 1.9k | |
| 2026-10-03 20:37 | alive | 1.0 s | 7 | 1.9k | |
| 2026-10-03 17:53 | alive | 605 ms | 7 | 1.9k |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.cyanheads/exchange-rates-mcp-server)
An entry for every probe that changed the result, the tool count or the token cost: Atom feed. Add it to a feed reader or a Slack RSS app to hear when the server stops answering or its tool set grows.