mcp-tx-dmv

# @pipeworx/tx-dmv

Texas DMV (TxDMV) MCP — statewide vehicle, pickup and motorcycle registration totals by
fiscal year, from TxDMV's own published series.

## Tools

- `tx_dmv_vehicle_registrations(fiscal_year?, limit?)` — total vehicles registered in Texas
  for a fiscal year, split into passenger cars, pickup trucks of one ton or less and
  motorcycles, each with its share of the fleet. Answers "how many vehicles are registered in
  Texas", "how many motorcycles are registered in Texas", and growth across years.

## Auth

Keyless.

## Grain and vintage — read this before quoting a number

Two things about this dataset trip people up, so both are reported on every response:

1. **Statewide only.** TxDMV publishes one row per fiscal year for the whole state. There is
   no county, city or ZIP breakdown in this series, and no make/model/fuel split. Passing
   `county`, `zip`, `make`, `model_year` or `fuel_type` returns
   `{ found: false, reason: "grain_unavailable" }` with a hint rather than silently ignoring
   the argument. For a ZIP-level fleet breakdown, `ca_dmv_vehicle_registrations` covers
   California at ZIP × make × model-year × fuel.
2. **The series stops at FY2021.** TxDMV last refreshed it on **2023-03-06**, so it covers
   **fiscal years 2001 through 2021** and recent years are simply absent. `as_of` carries the
   refresh date, `covers_fiscal_years` the span, and a `note` says so in words. Asking for
   `fiscal_year="2024"` returns `fiscal_year_unavailable` rather than an empty row list.

`total_vehicles` is only set when a single fiscal year is requested, because that row genuinely
is the whole Texas fleet for that year. Rows from different fiscal years are **not** summed:
they are cumulative snapshots of largely the same vehicles, so a sum would double-count every
car that stayed registered.

Verified live 2026-07-29: FY2001 `total_all_vehicles_registered` = 17,906,116;
FY2021 = 25,236,442.

## Data sources

- `https://data.texas.gov/resource/cbmj-zeje.json` — TxDMV "Passenger Vehicle, Motorcycle,
  and Pickup Truck Registrations by Year". 21 rows, FY2001–FY2021.
- `https://data.texas.gov/api/views/cbmj-zeje.json` — `rowsUpdatedAt`, used for `as_of`.

The three `*_of_all_vehicles` columns are fractions of 1 (`0.5831`), not percentages; the pack
converts them to percentages. `fiscal_year` is stored as text, so it is filtered with a string
equality and ordered as a string — which is safe for four-digit years.

## Quick Start

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

```json
{
  "mcpServers": {
    "tx-dmv": {
      "url": "https://gateway.pipeworx.io/tx-dmv/mcp"
    }
  }
}
```

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

```json
{
  "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 Texas DMV data" })
```

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

## More

- [All tools and guides](https://github.com/pipeworx-io/examples)
- [pipeworx.io](https://pipeworx.io)

## License

MIT