mcp-server-proj MCP server

@radial-hks

Repository

Basic information

About mcp-server-proj MCP server

MCP Server PROJ (cartographic projections and coordinate transformations )

#mcp-server#cartographic-projections#coordinate-transformations

mcp-server-proj MCP server config

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

{
  "mcpServers": {
    "mcp-server-proj": {
      "command": "uv",
      "args": [
        "--directory",
        "E:\\Code\\PythonDir\\MCP\\mcp-server-proj",
        "run",
        "mcp-server-proj"
      ]
    }
  }
}

mcp-server-proj MCP server tools

Source coordinate system

Target coordinate system

Array of points with x, y values

EPSG:4326

+proj=ortho +lon_0=112.364017384874 +lat_0=34.9227297291321 +a=6371010 +units=m +no_defs

[112.364017384874, 34.9227297291321]

Overview

What is mcp-server-proj?

mcp-server-proj is an MCP server for cartographic projections and coordinate transformations. It provides tools to transform coordinates between different coordinate systems using EPSG codes, WKT, or Proj formats, and is intended for users working with geospatial data in MCP-compatible clients like Claude Desktop.

How to use mcp-server-proj?

Install and run the server using uvx mcp-server-proj (published) or uv pointing to a local copy (development). Configure the server in your MCP client’s JSON configuration file (e.g., Claude Desktop). The server exposes two tools: transform-coordinates and list-supported-crs.

Key features of mcp-server-proj

Two coordinate transformation tools provided.
Supports EPSG, WKT, and Proj format input.
Accepts source CRS, target CRS, and coordinate arrays.
Lists all supported CRS formats with detailed examples.
Configurable for Claude Desktop on macOS and Windows.
Debuggable via the MCP Inspector.

Use cases of mcp-server-proj

Transform GPS coordinates (EPSG:4326) to projected coordinate systems.
Convert between WGS84 and Web Mercator projection.
View example EPSG, WKT, and Proj format specifications.
Integrate coordinate transformations into Claude Desktop workflows.

Frequently asked questions

What coordinate system formats does mcp-server-proj support?

It supports EPSG codes (e.g., EPSG:4326), Well-Known Text (WKT) format, and Proj format.

How do I configure mcp-server-proj for Claude Desktop?

Edit the `claude_desktop_config.json` file located in `~/Library/Application Support/Claude/` (macOS) or `%APPDATA%/Claude/` (Windows). Use `uvx mcp-server-proj` for published servers or `uv --directory <path> run mcp-server-proj` for development.

How can I debug mcp-server-proj?

Use the MCP Inspector by running `npx @modelcontextprotocol/inspector uv --directory <path> run mcp-server-proj` and opening the provided URL in a browser.

Can mcp-server-proj handle batch coordinate transformations?

The tool accepts an array of points with x, y values, so it can transform multiple coordinates in a single call.

Where can I find more information about coordinate reference systems?

Visit https://epsg.io/ for EPSG definitions, or the proj4js library repository for JavaScript implementations.

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