@pipeworx/hi-dmv

Hawaii vehicle-registration MCP — the statewide cumulative count of hybrid and electric vehicles registered in Hawaii, as an annual series from 1999 to the present.

Tools

• hi_dmv_ev_registrations(year?, limit?) — hybrid and battery-electric counts per year with a combined total, plus the year-over-year change and growth rate. Answers "how many electric vehicles are in Hawaii", "how many EVs were registered in Hawaii in 2020", "EV adoption trend in Hawaii".

Auth

Keyless.

Hawaii has no state DMV

Vehicle registration in Hawaii is administered by the four counties — Honolulu, Hawaii, Maui and Kauai — not by a state motor-vehicle agency. The statewide statistics are compiled and published by DBEDT, the state Department of Business, Economic Development and Tourism. That is why this pack has one statewide series and no office locator, and why the series carries no county split: the counties register, DBEDT aggregates.

Grain

A clean annual time series, one row per year, 1999 through 2024 (26 rows). Counts are cumulative registered vehicles at the end of each year, so a rising total means the fleet grew; the tool computes change_from_prior_year and growth_pct per row so a trend question needs no arithmetic from the caller. Rows are never summed across years — they are cumulative snapshots of largely the same vehicles.

Verified live 2026-07-29: 2024 → hybrid 31,284, electric 35,242, total 66,526 · 2023 → 27,658 / 29,239 / 56,897 · 1999 → electric 10.

Data sources

• https://opendata.hawaii.gov/api/3/action/datastore_search?resource_id=4d4c0403-8f04-4f74-879d-64669f1437b1 — DBEDT "Cumulative Hybrid & Electric Vehicles Registered".

Two shapes worth knowing before touching this resource:

• Counts arrive as thousands-separated strings ("31,284"), not numbers.
• A missing value arrives as the padded string " - ", not null and not zero. 1999 has no hybrid figure at all; reading that placeholder as 0 invents a data point, so the pack resolves it to null and the response note says what null means.
• Column names carry spaces and mixed case: Year, Hybrid Electric Vehicles, Electric Vehicle, Total.

Quick Start

Add to your MCP client (Claude Desktop, Cursor, Windsurf, etc.):

{
  "mcpServers": {
    "hi-dmv": {
      "url": "https://gateway.pipeworx.io/hi-dmv/mcp"
    }
  }
}

Or connect to the full Pipeworx gateway for access to all 1392+ data sources:

{
  "mcpServers": {
    "pipeworx": {
      "url": "https://gateway.pipeworx.io/mcp"
    }
  }
}

Using with ask_pipeworx

Instead of calling tools directly, you can ask questions in plain English:

ask_pipeworx({ question: "your question about Hawaii Vehicle Registrations data" })

The gateway picks the right tool and fills the arguments automatically.

More

• All tools and guides
• pipeworx.io

License

MIT