Koskamo

MCP Weather Server

An MCP server that provides US weather alerts and 5-day forecasts via the National Weather Service API. It exposes two read-only tools: get-alerts for state-specific warnings and get-forecast for point-based predictions. The server is free to run locally with no credentials required, or available as a hosted service.

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

MCP Weather Server logo, by Thx93Community listingStreamable HTTPNo sign-inEndpoint checked 2026-11-01Published by Thx93
MCP endpoint (Streamable HTTP)
https://agent-evidence.thx93.dev/weather/mcp
Vendor documentation

What you can do with it

  • Retrieve active weather alerts for a specific US state
  • Get the next five forecast periods for a geographic point
  • Discover available weather tools via MCP protocol
  • Probe service health before invoking paid tools

Source and maintenance

Community listingRegistry 1.2.1
mcp-registry: io.github.Thx93/weather@1.2.1Source repositoryProject website
Maintenance checked

Protocol and capabilities

Server
weather 1.2.1
MCP protocol
2025-06-18
Tools
3 advertised
Resources
Not advertised
Resource templates
Not advertised
Prompts
Not advertised
Server-advertised capabilities
{
  "tools": {}
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

US National Weather Service data for agents. No API key and no account: discovery and the health tool are free, and a tools/call costs $0.01 in USDC on Base over x402. Only US locations are supported.

Tools

3 advertised

get-alerts — Get Weather Alerts
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

Get active weather alerts for a US state. Give the two-letter state code (for example CA or NY) and get every active National Weather Service alert for it: the event type, the area it covers, its severity, what is happening, and the official instruction. US locations only. No API key and no account: discovery is free, a call costs $0.01 in USDC on Base via x402, and nothing is charged when the request returns no data. Free tools: health and tools/list.

get-alerts input schema
{
  "type": "object",
  "required": [
    "state"
  ],
  "properties": {
    "state": {
      "type": "string",
      "maxLength": 2,
      "minLength": 2,
      "description": "Two-letter US state code (e.g. CA, NY)"
    }
  },
  "additionalProperties": false
}
get-alerts output schema
{
  "type": "object",
  "required": [
    "alerts"
  ],
  "properties": {
    "alerts": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "event",
          "area",
          "severity",
          "description",
          "instructions"
        ],
        "properties": {
          "area": {
            "type": "string"
          },
          "event": {
            "type": "string"
          },
          "severity": {
            "type": "string"
          },
          "description": {
            "type": "string"
          },
          "instructions": {
            "type": "string"
          }
        },
        "additionalProperties": false
      }
    }
  },
  "additionalProperties": false
}
get-alerts annotations
{
  "title": "Get Weather Alerts",
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}
get-forecast — Get Weather Forecast
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

Get the weather forecast for a point on the map. Give latitude and longitude and get the next five forecast periods for it: the period name, its temperature, wind speed and direction, and the plain-language forecast. US locations only. No API key and no account: discovery is free, a call costs $0.01 in USDC on Base via x402, and nothing is charged when the request returns no data. Free tools: health and tools/list.

get-forecast input schema
{
  "type": "object",
  "required": [
    "latitude",
    "longitude"
  ],
  "properties": {
    "latitude": {
      "type": "number",
      "maximum": 90,
      "minimum": -90,
      "description": "Latitude of the location"
    },
    "longitude": {
      "type": "number",
      "maximum": 180,
      "minimum": -180,
      "description": "Longitude of the location"
    }
  },
  "additionalProperties": false
}
get-forecast output schema
{
  "type": "object",
  "required": [
    "latitude",
    "longitude",
    "periods"
  ],
  "properties": {
    "periods": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "name",
          "temperature",
          "temperature_unit",
          "wind_speed",
          "wind_direction",
          "detailed_forecast"
        ],
        "properties": {
          "name": {
            "type": "string"
          },
          "wind_speed": {
            "type": "string"
          },
          "temperature": {
            "type": [
              "number",
              "null"
            ]
          },
          "wind_direction": {
            "type": "string"
          },
          "temperature_unit": {
            "type": "string"
          },
          "detailed_forecast": {
            "type": "string"
          }
        },
        "additionalProperties": false
      }
    },
    "latitude": {
      "type": "number"
    },
    "longitude": {
      "type": "number"
    }
  },
  "additionalProperties": false
}
get-forecast annotations
{
  "title": "Get Weather Forecast",
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}
health — Health
Advertised by the server during the last successful anonymous check.
Advertised read-onlyOpen-world

Check that the service is up. Costs nothing.

health input schema
{
  "type": "object",
  "properties": {},
  "additionalProperties": false
}
health annotations
{
  "title": "Health",
  "readOnlyHint": true,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks
1 of 1 (100%)
Average latency
1423 ms
95th percentile latency
1423 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · probe · passed · 1423 ms · metadata changed · 3 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.
Claude Code configuration
claude mcp add --transport http mcp-weather-server-thx93 https://agent-evidence.thx93.dev/weather/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).
Codex configuration
codex mcp add mcp-weather-server-thx93 --url https://agent-evidence.thx93.dev/weather/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable mcp-weather-server-thx93 in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "mcp-weather-server-thx93": {
      "url": "https://agent-evidence.thx93.dev/weather/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "mcp-weather-server-thx93": {
      "type": "streamableHttp",
      "url": "https://agent-evidence.thx93.dev/weather/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start mcp-weather-server-thx93 and inspect its tools.
VS Code configuration
{
  "servers": {
    "mcp-weather-server-thx93": {
      "type": "http",
      "url": "https://agent-evidence.thx93.dev/weather/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.
Gemini CLI configuration
gemini mcp add --transport http mcp-weather-server-thx93 https://agent-evidence.thx93.dev/weather/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.
Claude Desktop configuration
{
  "mcpServers": {
    "mcp-weather-server-thx93": {
      "url": "https://agent-evidence.thx93.dev/weather/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.
Windsurf configuration
{
  "mcpServers": {
    "mcp-weather-server-thx93": {
      "serverUrl": "https://agent-evidence.thx93.dev/weather/mcp"
    }
  }
}

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