listingdata

listingdata

listingdata is a small local bridge to the hosted HasData Redfin MCP server, which returns Redfin real-estate data as JSON. It can look up for-sale, for-rent, or sold listings for a place, and it can pull one property in full from its Redfin URL: the address, list and sold prices and their history, the Redfin Estimate, beds and baths, size and lot, year built, tax and school data, and the listing agent's name as published on the page.

The bridge holds no listings of its own. It answers the tool list locally, exactly as captured from the live endpoint, and forwards each tool call upstream, returning whatever comes back untouched. The captured surface is two read-only fetches over public listing data: there is no booking, offer, contact-extraction, or payment tool in it.

Tools

• hasdata_redfin_listing_getRealEstateListings — search Redfin listings. Required: keyword (a zipcode, city, neighborhood, school, school district, apartment-building name, or full street address) and type (forSale, forRent, or sold). Optional filters cover price and monthly-payment ranges, sorting, home types, beds and baths, square footage, lot size, year built, listing category and status, time on Redfin, home features, rental amenities and pet terms, school ratings, walk / transit / bike scores, and a page number for paging. An address or building returns a single property card instead of a list. Returns listings with address, Redfin URL, list price, beds/baths, square footage, year built, days on market, status, coordinates, photos, and MLS number.
• hasdata_redfin_property_getPropertyDetails — fetch one property in full. Required: url (the Redfin property URL). Returns address, list/sold price, price history, Redfin Estimate, beds/baths, square footage, lot size, year built, property type, HOA, days on market, school ratings, tax history, listing agent, full description, photos, and nearby comparables.

Configuration

• HASDATA_REDFIN_MCP_URL (optional) — override the upstream endpoint. Defaults to https://mcp.hasdata.com/mcp?apis=redfin. (The override hook is this rebuild's own labelled reconstruction.)
• HASDATA_API_KEY (optional) — when set, every upstream request carries an x-api-key: <key> header, for the caller's own HasData API key. When it is not set, no key header is sent. (The header name and the env name are pinned by the original's registry record; forwarding the key from this env var is a labelled reconstruction — the original surface was captured keyless.)

Forwarding mechanics

On the first tool call the client opens a streamable HTTP session upstream: a JSON-RPC initialize request (protocolVersion 2025-03-26, clientInfo name listingdata), then a notifications/initialized notification, then the tools/call request carrying the caller's arguments unchanged. When the upstream answers initialize with an Mcp-Session-Id header, that value rides on every later request of the session, which is reused for the life of the process. Replies may arrive as plain JSON or as server-sent events; both are read.

Successful upstream results pass through verbatim, including any isError flag the upstream sets. Failures — a JSON-RPC error, a non-2xx status, an unreadable response, or a request that cannot be completed — come back as an isError result whose text starts with listingdata error: (this rendering is this rebuild's own labelled reconstruction).

CLI

Each tool is also a subcommand taking one JSON argument string:

npx @reneturcios/listingdata hasdata_redfin_listing_getRealEstateListings '{"keyword":"Austin, TX","type":"forSale"}'
npx @reneturcios/listingdata hasdata_redfin_property_getPropertyDetails '{"url":"https://www.redfin.com/example"}'
npx @reneturcios/listingdata --version

Exit codes: 0 on success, 1 on an isError result, 2 on a usage error.

MCP server

npx -y @reneturcios/listingdata mcp

MCP client config:

{
  "mcpServers": {
    "listingdata": {
      "command": "npx",
      "args": ["-y", "@reneturcios/listingdata", "mcp"]
    }
  }
}

Docker

docker run -i ghcr.io/cloudcorprecords/listingdata
docker run --rm ghcr.io/cloudcorprecords/listingdata --version

The container's default command is mcp, so the first form is a stdio MCP server; any other arguments reach the CLI normally.

Development

npm install
npm run build
npm test
npm run dev

The test suite runs entirely against a stubbed JSON-RPC upstream — no live network calls.

License

MIT — see LICENSE.