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MCP server · Productivity

Proj

by · github.com/radial-hks/mcp-server-proj

MCP Server PROJ (cartographic projections and coordinate transformations )

Unclaimed MIT last commit a year ago productivity
InstallView source
49Fair

Scored 8 days ago · breakdown

About Proj

Proj is an MCP server published by radial-hks in the Productivity category: mCP Server PROJ (cartographic projections and coordinate transformations ).

The repository has 2 stars and 0 forks, with the last commit a year ago. Six months or more without a commit doesn't mean the server is broken, but check the open issues before depending on it in production.

Install

From source
git clone https://github.com/radial-hks/mcp-server-proj

This server has no ConduID identity, so agent calls to it are not receipted. Pin the version you install and review the source before granting it credentials.

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Security checks

Static checks derived from the repository yesterday. Heuristics on the source, not an audit.

  • ✓README presentThe repository ships documentation.
  • ✓License declaredUsable under a stated license.
  • !Tests presentNo tests found. Behaviour changes may go unnoticed between versions.
  • ✓Dependencies pinnedA lockfile pins dependency versions.
  • ✓No dynamic code executionSource scan found no eval, dynamic Function, or shell execution.
  • !Scoped permissionsDoesn't declare a permission scope. Assume it can do anything its process can.

README

MCP Server PROJ

A Model Context Protocol (MCP) server for coordinate system transformations and map projections.

Features

  • Multiple coordinate system format support:
    • EPSG codes
    • WKT (Well-Known Text)
    • Proj string format
  • Batch coordinate transformation
  • Simple and intuitive API
  • Dual-mode operation: server or library

Installation

pip install mcp-server-proj

Usage

Server Mode

mcp-server-proj

Library Mode

from mcp_server_proj import CoordinateTransformer

# Create transformer instance
transformer = CoordinateTransformer()

# Set source and target coordinate systems
transformer.set_source_crs("EPSG:4326")  # WGS84
transformer.set_target_crs("EPSG:3857")  # Web Mercator

# Initialize transformer
transformer.initialize_transformer()

# Transform coordinates
x, y = transformer.transform_point(116.3, 39.9)
print(f"Transformed coordinates: ({x}, {y})")

API Documentation

CoordinateTransformer

The main coordinate transformation class provides the following methods:

  • set_source_crs(crs: str): Set source coordinate system
  • set_target_crs(crs: str): Set target coordinate system
  • initialize_transformer(): Initialize the transformer
  • transform_point(x: float, y: float) -> tuple[float, float]: Transform a single point

Server

The MCP protocol server provides two tools:

  • transform-coordinates: Transform coordinates between different systems

    {
  "source_crs": "EPSG:4326",
  "target_crs": "EPSG:3857",
  "coordinates": [
    {"x": 116.3, "y": 39.9}
  ]
}

  • list-supported-crs: List all supported coordinate systems

Supported Coordinate Systems

1. EPSG Codes

Standard identifiers for coordinate reference systems:

  • EPSG:4326 - WGS84 Geographic
  • EPSG:3857 - Web Mercator
  • And many more...

2. WKT Format

Example of a geographic coordinate system:

GEOGCS["WGS 84",
  DATUM["WGS_1984",
    SPHEROID["WGS 84",6378137,298.257223563]],
  PRIMEM["Greenwich",0],
  UNIT["degree",0.0174532925199433]]

3. Proj Format

Example of WGS84:

+proj=longlat +datum=WGS84 +no_defs +type=crs

Development

Debugging

For the best debugging experience, use the MCP Inspector:

npx @modelcontextprotocol/inspector mcp-server-proj

Dependencies

  • Python >= 3.12
  • mcp >= 1.3.0
  • pyproj >= 3.0.0

License

MIT

Author

radial-hks (radialjiajie@gmail.com)

Contributing

Issues and Pull Requests are welcome!

README fetched from the repository yesterday. The original is authoritative.

Questions

About Proj

How do I install Proj?

No package has been published for this server, so install it from source: clone the repository and follow its README.

Is Proj safe to use with an AI agent?

Its trust score is 49 out of 100 (fair). It passes 4 of the 6 static security checks run so far; the failures are listed above. It has no ConduID identity yet, so agent calls to it are not receipted.

Is Proj still maintained?

The last commit was a year ago. That's long enough that you should check whether the maintainer is responding to issues before depending on it.