Nosy Neighbor for developers
Programmatic access to the same NYC property data the web app shows: the five boroughs only (Manhattan, Brooklyn, Queens, the Bronx, Staten Island), nothing else. Both surfaces bill against ONE account allowance:
REST API
A versioned HTTP API at /v1/*, authenticated with an API key. Best for a script, backend service, or anything that is not an LLM agent.
MCP (Model Context Protocol)
The same six operations exposed as MCP tools over OAuth, for Claude Desktop, Claude Code, and other MCP-speaking agents.
Which one do I want?
- Building an app, script, or backend integration? Use the REST API. Mint a key from the developer dashboard and start with the quickstart.
- Using an AI agent (Claude, or another MCP client)? Use MCP. See setup for tested client configs.
- Calling it from code you are writing by hand, and want retries, SDKs, or typed responses? REST is the more conventional fit. The interactive API reference documents every field.
What is covered
The same operations run on either surface. Each one has an MCP tool name and a REST path, so the property report is lookup_property to an agent and /v1/lookup over HTTP.
- A full property report for one address.
- Listing search across an area.
- Comparable sold homes.
- Rental estimates.
- A digest of listings that changed.
- Current mortgage rates.
Every one of them enforces NYC-only coverage: an address, ZIP, or area outside the five boroughs gets a short coverage message, never a partial or best-effort answer, on both surfaces.
One shared allowance
The REST API and MCP are not separately metered: a call through either counts against the same per-minute and per-day allowance on your account. See Rate Limits for the exact numbers and per-operation costs.
Legal & acceptable use
The API is governed by the same Terms of Use as the web app — in particular, it is not a consumer reporting agency and may not be used for tenant screening or any other purpose covered by the federal Fair Credit Reporting Act, and must not be used to steer, exclude, or target anyone in violation of fair-housing law. Full acceptable-use terms are on /docs/api and the Terms of Use page.