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, call tools over plain GET, or attach a remote MCP server.

GEThttps://opengems.xyz/llms.txt Index of every gem, endpoint, and rule
GEThttps://opengems.xyz/api/v1/catalog.json Data catalog: every dataset with source, vintage, license, freshness
GEThttps://stats.opengems.xyz/api/v1/tools Callable Stats tools: Census, BLS, HUD
MCPhttps://stats.opengems.xyz/mcp Remote MCP server (Streamable HTTP). Atlas: rent.opengems.xyz/mcp

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