Meltema Weather MCP Server

com.meltema/weather

answering

Meltema Weather is answering right now. Last checked 2 min ago. It exposes 5 tools.

Multi-model weather forecasts: point series, model scoreboard, and gridded fields. No auth.

Uptime history 44 hours of history · worst hour 50%

44 hours agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

319 ms

Response time

average over 24h

open, no key

Access

streamable-http

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 2 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add weather --transport http https://meltema.com/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "weather": {
      "url": "https://meltema.com/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.weather]
url = "https://meltema.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "weather": {
      "url": "https://meltema.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "weather": {
      "url": "https://meltema.com/mcp"
    }
  }
}

Available tools 5

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

compare

compare_models

Sample one variable at a point across many models and summarize per-time cross-model spread (min/max/mean/spread). Sources default to every live source carrying the variable; pass a comma-separated `sources` to pin the set. Canonical variable ids: t2m = 2 m air temperature (K), u10 = 10 m U wind component (m/s), v10 = 10 m V wind component (m/s), wind_speed = 10 m wind speed, derived hypot(u10, v10) (m/s), tp = total precipitation over the step (kg m-2, mm-equivalent), tcc = total cloud cover (fraction 0-1), ssrd = surface downward shortwave radiation (W m-2), msl = mean sea level pressure (Pa) (availability varies by source — see GET /v1/sources). Common aliases are accepted case-insensitively and normalized to these ids: temperature/temperature_2m/temp -> t2m, wind/windspeed/wind_speed_10m -> wind_speed, u10m/v10m -> u10/v10, precip/precipitation/rain -> tp, cloud/clouds/cloud_cover -> tcc, solar/radiation/shortwave -> ssrd, pressure/mslp/sea_level_pressure -> msl. The output series always carries the canonical id.

describe

describe_grid

Geometry (grid spec + available leads + units) of a gridded field, plus the exact /v1/grid URL and the recipe to decode the raw uint16 bytes. Omit init_time for the latest run.

point

point_forecast

Full forecast horizon of one model at a single point (bilinear grid sample). source_id is OPTIONAL: omit it and a sensible live source is chosen (prefers gfs, then ifs_open) and returned as `source_id`. Omit init_time for the latest run; omit variables for all stored variables plus derived wind_speed. Canonical variable ids: t2m = 2 m air temperature (K), u10 = 10 m U wind component (m/s), v10 = 10 m V wind component (m/s), wind_speed = 10 m wind speed, derived hypot(u10, v10) (m/s), tp = total precipitation over the step (kg m-2, mm-equivalent), tcc = total cloud cover (fraction 0-1), ssrd = surface downward shortwave radiation (W m-2), msl = mean sea level pressure (Pa) (availability varies by source — see GET /v1/sources). Common aliases are accepted case-insensitively and normalized to these ids: temperature/temperature_2m/temp -> t2m, wind/windspeed/wind_speed_10m -> wind_speed, u10m/v10m -> u10/v10, precip/precipitation/rain -> tp, cloud/clouds/cloud_cover -> tcc, solar/radiation/shortwave -> ssrd, pressure/mslp/sea_level_pressure -> msl. The output series always carries the canonical id.

runs

list_runs

Stored run init times for a source, newest first (UTC ISO 8601). Pass one to pin a tool to that run.

sources

list_sources

Every public forecast source with live-data status, servable variables, cadence and licensing attribution. This is the live enum of `source_id` accepted by the other tools.

Endpoints

URL	Transport	State	Latency	Checked
https://meltema.com/mcp	streamable-http	answering	363 ms	2 min ago

Meltema Weather — questions

Answers built from our own checks of this server.

What can Meltema Weather do?

It exposes 5 tools, read directly from the server on our last check. Among them: compare_models, describe_grid, list_runs, list_sources, point_forecast. 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 Meltema Weather working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 319 ms. The bar chart above shows every period we have measured.

How do I connect Meltema Weather?

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 Meltema Weather need an API key?

No. Meltema Weather completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 5 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Meltema Weather?

It answers our handshake in 319 ms on average, which is faster than 44% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.