{
  "mcpServers": {
    "driftwatch": {
      "command": "npx",
      "args": ["-y", "driftwatch-mcp"]
    }
  }
}

Without driftwatch:  ~6 failed iterations x ~15k tokens  ->  $0.30-$1.50 + 10-20 min
With driftwatch:     1 call                              ->  $0.05

npm install
cp .env.example .env
npm start

# The product
curl "localhost:4021/v1/delta?ecosystem=npm&name=react&from=18.2.0&to=19.0.0"

# Free safety check -- catches hallucinated and typosquatted packages
curl "localhost:4021/v1/check?ecosystem=npm&name=recat"

{
  "package": "react",
  "from": "18.2.0", "to": "19.0.0",
  "jump": { "kind": "major", "majorsCrossed": 1, "releasesInRange": 583 },
  "tier": "evidence",
  "breakingChanges": [
    {
      "summary": "Removed: `ReactDOM.render`, `ReactDOM.hydrate` ...",
      "version": "19.0.0",
      "confidence": "medium",
      "symbols": ["ReactDOM", "render", "hydrate"],
      "citations": [{ "kind": "release-note", "url": "https://github.com/..." }]
    }
  ],
  "advisories": [],
  "citations": [ /* every source we relied on */ ]
}

                 ┌──────────────────────────────────────────┐
                 │   FREE PUBLIC SOURCES  (no licensed data) │
                 │   npm · PyPI · GitHub Releases · OSV.dev  │
                 └────────────────────┬─────────────────────┘
                                      │
                          ┌───────────▼───────────┐
                          │   ENGINE               │
                          │  ┌──────────────────┐  │
                          │  │ deterministic    │  │  always on, $0
                          │  │ extraction       │  │
                          │  └────────┬─────────┘  │
                          │  ┌────────▼─────────┐  │
                          │  │ LLM synthesis    │  │  OPTIONAL, capped
                          │  │ (off by default) │  │
                          │  └────────┬─────────┘  │
                          └───────────┼────────────┘
                                      │
                          ┌───────────▼───────────┐
                          │  SQLite PERMANENT CACHE│  ← the margin
                          │  + revenue ledger      │
                          └───────────┬───────────┘
                                      │
              ┌───────────────────────┼───────────────────────┐
              │                       │                       │
      ┌───────▼───────┐      ┌────────▼────────┐    ┌────────▼────────┐
      │  MCP server   │      │   HTTP API      │    │  x402 layer     │
      │  (stdio)      │      │   + OpenAPI     │    │  (Base, USDC)   │
      │               │      │                 │    │                 │
      │ DISTRIBUTION  │      │    REVENUE      │    │   OPTIONALITY   │
      └───────────────┘      └─────────────────┘    └─────────────────┘

{
  "mcpServers": {
    "driftwatch": {
      "command": "node",
      "args": ["--experimental-strip-types", "/path/to/driftwatch/src/mcp/server.ts"]
    }
  }
}

npm start           # run the API server
npm run dev         # run with auto-reload
npm run mcp         # run the MCP server (stdio)
npm test            # unit tests -- no network, no cost
npm run testclient  # simulate a customer end to end
npm run wallet:new  # generate a TESTNET wallet