market data for ChatGPT

app.doorbase/market-data

US rental market data by zip: rent, cap rates, vacancy, hazard risk, rent trends. Free, no auth.

client:ChatGPT transport:streamable-http tools:6

Install market data in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://doorbase.app/mcp

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs