Aviation & Transport
FMCSA Insurance Filings
GET
/v1/aviation/fmcsa/carrier/{dotNumber}/insurance$0.01 per callActive and pending insurance filings: type, insurer, policy number and coverage. Source: the public FMCSA datasets on data.transportation.gov (no API key). If the FMCSA data service cannot be reached the response is 502, never an assumed "verified".
Parameters
| Name | In | Type | Description |
|---|---|---|---|
| dotNumberrequired | path | string |
Response fields
| Field | Type | Description |
|---|---|---|
| success | boolean | |
| dotNumber | string | |
| found | boolean |
Fields are read from a real response captured 2026-11-04, shortened. Optional fields may be absent in other responses.
Errors
- 400 invalid request
- 401 missing or bad key
- 403 not in your plan
- 429 rate limited, see Retry-After
- 402 payment required
- 502 data source unavailable
- 5xx retry with backoff
Error bodies and codes are described in Error codes and troubleshooting.