Ca Dmv MCP server

@pipeworx/ca-dmv

California DMV data: registered vehicles and EV adoption by ZIP code, all 187 field offices with the services each performs, the official forms catalog, insurer NAIC codes, and licensed-driver counts by county. Keyless.

Part of Pipeworx — an MCP gateway connecting AI agents to 1476+ live data sources.

Why this is one state per pack

Part of the dmv category — one pack per state motor-vehicle agency. The states do not share a grain: California publishes a ZIP × make × model-year × fuel snapshot, New York a record-level file, Washington monthly transaction counts, Maryland county-months, Pennsylvania county-quarters. A single cross-state tool meant a schema where most arguments were ignored for most states and a "total" that was never comparable, so each agency gets its own tools with its own real arguments. For every DMV tool in one connection, use /mcp?vertical=dmv.

Tools

Auth

None. Every endpoint is public California state infrastructure. The CKAN-backed tools accept an optional CKAN API key, which the public datasets do not require.

Gotchas worth knowing

Live-verified behaviours, not guesses:

December 31 as their as-of date — the "2026" file describes the fleet on 2025-12-31.

• Snapshots are one CKAN resource per year, 2019–2026, and the rows carry the prior

which outranks every real ZIP. Ignore it when ranking ZIPs; the tool flags it in note.

• Grouping by ZIP surfaces a literal OOS bucket — out-of-state registrants, ~638k vehicles —

genuine makes in a by-make ranking.

• OTHER/UNK is a real make value that absorbs small-count suppression and can outrank

its sum is the true fleet total; any other grouping can be cut off by limit, and those responses carry sumofreturned_rows plus truncated instead.

• totalvehicles appears only when it is honest.** Grouping by fuel returns every category, so

Diesel and Diesel Hybrid, Hydrogen Fuel Cell). Plain words like "electric", "phev" or "hydrogen" are mapped for you.

• Fuel labels are specific strings (Battery Electric, Plug-in Hybrid, Hybrid Gasoline,

"title transfer" can put a vessel-title form above the vehicle one.

• Form search uses the DMV site's own relevance ranking, so a broad phrase like

do; cadmvoffices returns posted hours instead.

• California publishes no wait-time feed. Only North Carolina (nc-dmv) and Oregon (or-dmv)

token and appointments run on a session-based kiosk system.

• Lien lookup and appointment booking are unavailable: the lien endpoint requires a reCAPTCHA

Data sources

• Vehicle Fuel Type Count by Zip Code — data.ca.gov CKAN, datastoresearchsql
• Driver Licenses Outstanding by County — data.ca.gov CKAN
• Field office directory — dmv.ca.gov WP REST, hours and per-office service tags
• Forms catalog — dmv.ca.gov WP REST
• Insurance carrier NAIC lookup — https://www.dmv.ca.gov/portal/wp-json/dmv/v1/naic-lookup?s=

Quick Start

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

Shortened. The full README is on GitHub.