io.github.cyanheads/open-meteo-mcp-server
open-meteo-mcp-server
Global weather via Open-Meteo: forecast, historical, marine, air quality, geocoding, elevation.
alive probed 2026-10-13 · HTTP 200
11tools
18ktokens in Claude Opus 5.5
18ktokens in Claude Code
9.1 %of a 200k context window
11ko200k_base estimate
348 msto initialize
107 msto list tools
- Endpoint
- https://open-meteo.caseyjhand.com/mcp (streamable-http)
- Host
- open-meteo.caseyjhand.com
- Protocol
- 2025-11-25
- Reports itself as
- open-meteo-mcp-server 0.4.1
- Capabilities
- logging, prompts, resources, tools
- Instructions
- 5 112 characters
- Claude count
- Claude Opus 5.5, measured 2026-10-13. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/cyanheads/open-meteo-mcp-server
- Registry
- active, updated 2026-10-12 · registry entry
- Reachable
- 7 of the last 7 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| openmeteo_get_ensemble | 1 664 | 15 % |
| openmeteo_get_historical | 1 649 | 15 % |
| openmeteo_get_air_quality | 1 362 | 12 % |
| openmeteo_get_marine | 1 283 | 11 % |
| openmeteo_get_forecast | 1 270 | 11 % |
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-10-13 11:15 | alive | 578 ms | 11 | 18k | 11k |
| 2026-10-05 14:39 | alive | 348 ms | 11 | 16k | 9.7k |
| 2026-10-05 00:33 | alive | 182 ms | 11 | 9.7k | |
| 2026-10-04 10:04 | alive | 325 ms | 11 | 9.7k | |
| 2026-10-04 07:57 | alive | 403 ms | 11 | 9.7k | |
| 2026-10-03 20:37 | alive | 982 ms | 11 | 9.7k | |
| 2026-10-03 17:53 | alive | 346 ms | 11 | 9.7k |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.cyanheads/open-meteo-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.