FMCSA Carrier Lookup

A free, read-only connector for Claude. Unofficial: it is not made by or affiliated with FMCSA or the U.S. Department of Transportation.

What it is

An MCP server that lets Claude look up a U.S. motor carrier, broker or freight forwarder in public FMCSA records: operating authority with its source and as-of date, insurance and bond filings on file, out-of-service orders, safety rating, MCS-150 date, address and phone, and recent dated changes. It needs no account and no sign-in.

Add it to Claude

Server URL: https://fmcsa-carrier-lookup.pages.dev/mcp (Streamable HTTP, no authentication)

claude.ai and Claude Desktop (Pro and Max plans): go to Customize > Connectors, click + Add, choose Add custom connector, enter a name, paste the URL above and continue. The server needs no sign-in. On Team and Enterprise plans an owner adds it for the organization.
Claude Code:

claude mcp add --transport http fmcsa-carrier https://fmcsa-carrier-lookup.pages.dev/mcp

Then ask, for example: “Look up USDOT 44110”, “What changed for MC1515 in the last 30 days?”, or “Find carriers named Greyhound in Texas.”

Tools

Tool	What it does
`lookup_carrier`	One carrier by USDOT number, MC/MX/FF docket number or name: identity, authority per docket with basis and date, insurance and bond filings, out-of-service orders, safety rating, MCS-150, address and phone, units and drivers.
`carrier_changes`	Dated events over the last 1 to 365 days (default 30): authority status changes with FMCSA reasons, suspension or revocation notices, insurance filings received or ending, BOC-3 filings, out-of-service orders.
`search_carriers`	Name search in the census file, optional state filter, up to 10 matches.

Data sources

All sources are public and keyless. Each result lists the sources it used, with fetch times.

FMCSA Motus public carrier record, motus.dot.gov/api/carriers/<USDOT>: current operating authority status per docket and insurance and BOC-3 filings. Read live and cached for up to 30 minutes.
Open data on data.transportation.gov (FMCSA): Company Census File az4n-8mr2 (identity, contact, MCS-150, safety rating, units; about two days behind), Motus history files yu5v-wbh6, 3uet-3z4i, wb4f-neki, 6snj-ed7q, inys-ebih, c5y8-a4uz (rebuilt daily), out-of-service orders p2mt-9ige.
FMCSA legacy L&I Carrier file 6eyk-hxee: used only for a carrier absent from the Motus record, and always labelled as frozen on 2026-05-14 (FMCSA stopped updating it on that date).

Limits you should know

These are public FMCSA records, which can be delayed or wrong. They are not a substitute for your own vetting. For an authoritative check use SAFER.
Insurance shown is the public filing record. A carrier can hold coverage that is not filed with FMCSA, and a filing can be cancelled with a future effective date.
E-mail addresses are never shown. Phone numbers and addresses are shown as FMCSA publishes them.
Safety scores (BASIC percentiles) and complaint counts are not included.

See the privacy policy for what is logged.