Overture Maps MCP
Python MCP server for querying Overture Maps building footprint data via address search, building lookups, and nearby building listings.
README
Overture Maps MCP
Python MCP server (2025-03-26 spec, streamable HTTP) for querying Overture Maps building footprint data.
Tools
| Tool | Description |
|---|---|
address_search(query, limit=5) |
Geocode addresses via Nominatim |
get_building(lat, lon, radius_m=100) |
Get building footprint at a coordinate |
get_building_by_id(id, lat_hint, lon_hint) |
Fetch building by Overture GERS ID |
nearby_buildings(lat, lon, radius_m=200, limit=10) |
List nearby buildings |
Deployment
Railway (recommended)
- Fork this repo or connect it to Railway
- Set environment variables:
MCP_SERVER_SECRET— bearer token for API authPORT— automatically set by Railway (default 8000)
- Railway builds the Dockerfile and deploys
Docker
docker build -t overture-mcp .
docker run -p 8000:8000 -e MCP_SERVER_SECRET=your-secret overture-mcp
Local development
pip install -e ".[dev]"
uvicorn src.overture_mcp.server:app --reload
API
GET /health— health check (no auth required)POST /mcp— MCP streamable HTTP endpoint (requiresAuthorization: Bearer <token>)
Auth
Set MCP_SERVER_SECRET to require a bearer token on all MCP requests.
Leave unset to disable auth (development only).
Data
Queries the Overture Maps 2026-05-20.0 release (~2.5B buildings globally)
stored on AWS S3 (s3://overturemaps-us-west-2). DuckDB reads parquet files
directly — no data is downloaded to the server.
Each query uses a bounding-box predicate for partition pruning, so typical requests scan only a small fraction of the dataset.
Connecting to Claude
Add to .claude/settings.json:
{
"mcpServers": {
"overture-maps": {
"transport": "streamable-http",
"url": "https://your-deployment.railway.app/mcp",
"headers": {
"Authorization": "Bearer your-secret"
}
}
}
}
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