SpiderNet
What can I build here? Is this lot in a flood zone? What does the code allow? Who owns this block?
Every tax lot in NYC, cross-referenced against what's zoned, what's built, and its modeled flood risk — zoning, historic, and transit overlays, plus live flood sensors, layered right on top. Explore it on the map, query it as a free API, or wire an AI agent straight into it over MCP. No key, no signup.
856,694
tax lots mapped
38,105
buildings in historic districts
491
live FloodNet sensors
$0
to use — no signup
Three ways in
Explore the map
Color lots by land use, FAR, lot area, or availability. Filter by borough, layer on zoning, landmarks, transit zones, and flood risk, and click any lot for its full record.
Open the mapAsk in plain English
The assistant on the map answers questions directly — no syntax to learn. The guide shows you how, start to finish.
Read the guideBuild on it
A free REST API and an MCP server for agents — same data, no key, no signup.
See the developer docs