io.github.chrischall/onehome-mcp

onehome-mcp

MCP server for OneHome (CoreLogic) — search the listings your real-estate agent curated for you, fetch property details + photos, compare houses side-by-side, and run mortgage / affordability math from within Claude.

Sister project to zillow-mcp, redfin-mcp, compass-mcp, and homes-mcp. Same tool ergonomics — different upstream auth model.

This project was developed and is maintained by AI (Claude). Use at your own discretion.

What's different about OneHome

OneHome isn't a public listings site. Buyers usually reach it through a magic link an agent emails them — https://portal.onehome.com/...?token=eyJ.... That token query param IS the per-user bearer that the portal SPA hands to every GraphQL request.

So instead of routing every fetch through your signed-in browser tab (like the other realty MCPs), onehome-mcp talks directly to services.onehome.com/graphql from Node, with Authorization: Bearer <jwt> attached. We support three ways to source that bearer:

ContextMint Bridge is the fetchproxy browser extension under its new name, from the same maintainer — fetchproxy's own README (fetchproxy#extension) points to it. Its source is public at nullnet-app/contextmint-bridge: build it yourself, or check a release zip against the .sha256 file published beside it (shasum -a 256 -c contextmint-bridge-chrome-<version>.zip.sha256).

Tools

Install

The simplest path is the published Claude plugin (.mcpb install). Its settings take an optional OneHome magic link or bearer token (both stored as sensitive values); leave both blank to use browser-bridge capture instead. For local dev:

git clone https://github.com/chrischall/onehome-mcp
cd onehome-mcp
npm install
npm run build

Then point your MCP host at node /abs/path/to/onehome-mcp/dist/bundle.js with one of:

// claude_desktop_config.json
{
  "mcpServers": {
    "onehome-mcp": {
      "command": "node",
      "args": ["/abs/path/to/onehome-mcp/dist/bundle.js"],
      "env": {
        "ONEHOME_MAGIC_LINK": "https://portal.onehome.com/en-US/properties/map?token=eyJ..."
      }
    }
  }
}

Development

npm test               # vitest, mocked transport, no network
npm run test:watch
npm run test:coverage
npx tsc --noEmit
npm run build          # tsc --noEmit + esbuild → dist/bundle.js

Tests use a FakeTransport (in tests/helpers.ts) that registers per-operationName handlers — there's no live network in the test suite. The tests/index.test.ts smoke check loads the same tool registrations src/index.ts uses against an in-memory MCP client/server pair, so "I wrote the tool file but forgot to wire it up" mistakes fail loudly.

License

MIT.