US ZIP codes and addresses. Or click anywhere on the map. Addresses are geocoded by the free U.S. Census Geocoder.
These are the MCP tool calls behind this map, run on the same server your agent connects to. Long lists and coordinates are trimmed here; your agent gets them in full.
Add the whole atlas to your agent. Free.
One MCP server for every election map you build. No key, no sign-up.
- Current precincts for about 92% of the US population (2020 Census VTDs elsewhere), plus every county and town
- Congressional and state legislative districts in force for Nov 3, 2026, including the mid-decade redraws
- Canada: federal ridings, polling divisions and provincial districts
- GeoJSON boundaries at three detail levels, point lookups, and population-weighted links between precincts, ZIPs, counties and districts
- Source, licence and freshness on every record
MCP endpoint:
Install
Support it
Free while it grows. If it saves you time, chip in to keep precincts and district maps current.
Support Boundary Atlas
Data: U.S. Census Bureau (TIGER/Line, 2020 Census, ZCTA relationship files; public domain), state and county election offices, Elections Canada, Statistics Canada. Basemap © OpenFreeMap, © OpenStreetMap contributors. Demo lookups are rate-limited.