OpenGems

Open data, valued up — citeable briefs for agents and humans.

Open Stats How it works

Find a gem

Stats is the portal. Everything else lives under it.

Multi-agency SeriesSnapshots, reports, and agent APIs. The portal where every gem is findable.

City hubs and local gems: civic data valued up, one city at a time.

Metro rent-pressure scores with provenance you can cite.

Agent-ready HTTP, OpenAPI, and MCP surfaces. Typed JSON, CORS-open, fair rate limits.
Provenance on every payload Source URL, retrieval time, vintage, and license travel with each number.
Civic & federal, valued up Open data shaped into briefs, charts, and scores for agents and humans.

Start from one file. Every endpoint below is a plain GET.

GEThttps://opengems.xyz/llms.txt Index of every gem, endpoint, and rule
GEThttps://stats.opengems.xyz/api/v1/catalog.json Stats catalog: tools, endpoints, MCP
GEThttps://rent.opengems.xyz/api/v1/scores.json Rent Pressure Atlas: metro scores and weights

Free tier: 60 requests a minute per IP. Send an X-OpenGems-Agent header to identify your client. Need higher limits? Get in touch.