Privacy policy

Boundary Atlas is free and needs no account. It counts usage per day to see what's useful, keeps no IP addresses, stores no addresses you look up, and sets no cookies.

What is collected

• Counts, per day: page views by page type, MCP requests, which tools were called, the client name an MCP client sends (for example "claude-ai"), the referring website's domain, crawler visits, rate-limit hits and errors.
• A daily count of distinct visitors, made from a random salt that is held in memory and replaced every day, so visitors can't be linked from one day to the next.
• No cookies, no accounts, no advertising or tracking scripts, and no third-party analytics.

What is not stored

• IP addresses: used in memory to apply the per-IP rate limits, then forgotten. They are never written to disk or to the analytics database.
• Addresses you type and points you share: used once to answer the lookup and not stored or logged. Tool arguments sent to the MCP server (IDs, coordinates) are not stored either; only the tool's name is counted.

Third parties

• U.S. Census Geocoder: a typed US address is sent to the Census Bureau's free geocoder to get its coordinates (census.gov privacy policy applies).
• OpenFreeMap and unpkg.com: the map demo loads basemap tiles from OpenFreeMap and the MapLibre library from unpkg, so your browser contacts them directly.
• Stripe: the Support link opens a Stripe payment page; Stripe handles any payment under its own privacy policy, and Boundary Atlas never sees card details.
• Railway hosts the server. Its request logs record the requested path and status, with an internal proxy address instead of your IP.
• Nothing is sold or shared with anyone else.

Retention

• Daily counts are kept so trends can be compared over time; they contain no personal data. Hosting request logs are kept for the hosting provider's standard log retention period. Download links for large GeoJSON sets expire after an hour; the files are generated on request and not kept.

The data itself

• Boundaries and officials come from public sources (U.S. Census Bureau, state and county election offices, Elections Canada, Statistics Canada, Open States, Wikidata, congress-legislators). Each record names its source and licence; call data_freshness for the list.

Contact

Questions or corrections: use the contact link on the home page.

Last updated November 7, 2026.