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Wgrib2 Easy MCP Server

@yskmasumoto

Repository

Basic information

Category

Files & Storage

Transports

stdio

Author

yskmasumoto

About Wgrib2 Easy MCP Server

An MCP server for executing wgrib2 commands from MCP Client. Designed with a simple approach where converted files are saved to a specific folder.

Wgrib2 Easy MCP Server config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "wgrib2-easy-mcp": {
      "command": "uv",
      "args": [
        "pip",
        "install",
        "-r",
        "requirements.txt"
      ]
    }
  }
}

Wgrib2 Easy MCP Server tools

Tool list not available yet

This listing does not currently have a tool list to display. This does not mean the server has no tools; check its documentation for supported capabilities.

We auto-extract tools from the README. The maintainer can list them under a ## Tools heading to populate this section.

Overview

What is wgrib2-easy-mcp?

A simple MCP server designed to execute wgrib2 commands remotely via an MCP Client. Processed files are saved to a designated output directory. It is intended for users who need to interact with GRIB2 meteorological data files through a remote client interface.

How to use wgrib2-easy-mcp?

Clone the repository, install dependencies with uv pip install -r requirements.txt, and configure environment variables—notably the required OUTPUT_DIR (must exist before starting). Start the server with uv run --with python-dotenv --with mcp src/server.py. Connect your MCP Client and invoke the available tools, providing the path to a GRIB2 file. A sample script (src/sample/sample.py) demonstrates usage patterns.

Key features of wgrib2-easy-mcp

  • Execute wgrib2 commands via an MCP Client connection
  • Tools: list_contents, show_details, show_help
  • Configuration through environment variables (OUTPUT_DIR required)
  • Generated files saved to a designated output directory
  • Sample script for usage demonstration

Use cases of wgrib2-easy-mcp

  • List inventory of messages in a GRIB2 file
  • Show detailed information about GRIB2 file messages
  • Access wgrib2 help documentation remotely
  • Save results to a specified output directory for further analysis

Frequently asked questions

1

What are the prerequisites for the server machine?

Python 3.x, git, `uv` (Python project manager), and `wgrib2` installed and accessible in the system’s PATH are required. Also, an MCP Client environment must be able to connect to this server.

2

How do I configure wgrib2-easy-mcp?

Set the environment variable `OUTPUT_DIR` to an absolute path (the directory must exist before starting the server). Optionally set `WGRIB2_PATH` (defaults to `wgrib2` in PATH) and `TEST_GRIB2_FILE` for the sample script.

3

What tools does wgrib2-easy-mcp expose?

Three stable MCP tools: `list_contents` (lists inventory), `show_details` (displays message details), and `show_help` (provides wgrib2 help documentation).

4

Are file extraction or conversion tools already available?

No. Element extraction and conversions to CSV/binary are currently under development and are only demonstrated in the sample script for illustration. Stable tools for these operations are not yet provided.

5

Where are output files saved?

All generated files (e.g., CSV, binary extracts) are saved directly into the directory specified by the `OUTPUT_DIR` environment variable on the server machine. This directory must exist before launching the server.

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