MCP-OSM: OpenStreetMap Integration for MCP

This package provides OpenStreetMap integration for MCP, allowing users to query and visualize map data through an MCP interface.

Features

Web-based map viewer using Leaflet and OpenStreetMap
Server-to-client communication via Server-Sent Events (SSE)
MCP tools for map control (adding markers, polygons, setting view, getting view)
PostgreSQL/PostGIS query interface for OpenStreetMap data

Installation

This is my claude_desktop_config.json:

{
  "mcpServers": {
    "OSM PostgreSQL Server": {
      "command": "/Users/wiseman/.local/bin/uv",
      "args": [
        "run",
        "--env-file",
        ".env",
        "--with",
        "mcp[cli]",
        "--with",
        "psycopg2",
        "--with-editable",
        "/Users/wiseman/src/mcp-osm",
        "--directory",
        "/Users/wiseman/src/mcp-osm",
        "mcp",
        "run",
        "mcp.py"
      ]
    }
  }
}

When the MCP server starts it also starts a web server at http://localhost:8889/ that has the map interface.

Environment Variables

The following environment variables can be used to configure the MCP:

FLASK_HOST - Host for the Flask server (default: 127.0.0.1)
FLASK_PORT - Port for the Flask server (default: 8889)
PGHOST - PostgreSQL host (default: localhost)
PGPORT - PostgreSQL port (default: 5432)
PGDB - PostgreSQL database name (default: osm)
PGUSER - PostgreSQL username (default: postgres)
PGPASSWORD - PostgreSQL password (default: postgres)

MCP Tools

The following MCP tools are available:

get_map_view - Get the current map view
set_map_view - Set the map view to specific coordinates or bounds
set_map_title - Set the title displayed at the bottom right of the map
add_map_marker - Add a marker at specific coordinates
add_map_line - Add a line defined by a set of coordinates
add_map_polygon - Add a polygon defined by a set of coordinates
query_osm_postgres - Execute a SQL query against the OpenStreetMap database