{
"order_id": "ord_example_c1",
"sku": "carrier-authority-check",
"status": "DELIVERED",
"delivery": {
"query": {
"dot": "44110",
"mc": null
},
"found": true,
"carrier": {
"legal_name": "GREYHOUND LINES INC",
"dba_name": "BOLT BUS",
"dot": 44110,
"ein_present": true,
"phy_city": "DALLAS",
"phy_state": "TX",
"allowed_to_operate": "Y",
"status_code": "A",
"oos_date": null
},
"authority": {
"common": "A",
"contract": "A",
"broker": "I"
},
"safety": {
"rating": "S",
"rating_date": "2026-07-08",
"total_power_units": 683,
"total_drivers": 905,
"crash_total": 70,
"fatal_crash": 6,
"tow_crash": 25,
"driver_insp": 766,
"driver_oos_rate": 1.4360313315926894,
"vehicle_insp": 336,
"vehicle_oos_rate": 7.440476190476191
},
"flags": [],
"verdict": "CLEAR",
"source": "FMCSA QCMobile (US DOT, live)",
"retrieved_at": "2026-10-18T21:34:36.295Z",
"disclaimer": "Federal registration/safety data; verify insurance separately before tendering."
},
"channel": "zyla"
}
curl --location --request GET 'https://zylalabs.com/api/14343/fmcsa+carrier+vetting+api/35949/check+carrier+authority?dot=44110' --header 'Authorization: Bearer YOUR_API_KEY'
{
"order_id": "ord_example_lv1",
"sku": "load-vet-pack",
"status": "DELIVERED",
"delivery": {
"query": {
"dot": "44110",
"mc": null,
"broker_mc": null,
"name": null
},
"verdict": "HOLD",
"reasons": [
"ACUTE_CRITICAL_DRIVER_FITNESS"
],
"partial": false,
"sections": {
"authority": "ok",
"basics": "ok",
"broker": "skipped",
"ofac": "skipped"
},
"hold_basis": "carrier_risk",
"authority": {
"query": {
"dot": "44110",
"mc": null
},
"found": true,
"carrier": {
"legal_name": "GREYHOUND LINES INC",
"dba_name": "BOLT BUS",
"dot": 44110,
"ein_present": true,
"phy_city": "DALLAS",
"phy_state": "TX",
"allowed_to_operate": "Y",
"status_code": "A",
"oos_date": null
},
"authority": {
"common": "A",
"contract": "A",
"broker": "I"
},
"safety": {
"rating": "S",
"rating_date": "2026-07-08",
"total_power_units": 683,
"total_drivers": 905,
"crash_total": 70,
"fatal_crash": 6,
"tow_crash": 25,
"driver_insp": 766,
"driver_oos_rate": 1.4360313315926894,
"vehicle_insp": 336,
"vehicle_oos_rate": 7.440476190476191
},
"flags": [],
"verdict": "CLEAR",
"source": "FMCSA QCMobile (US DOT, live)",
"retrieved_at": "2026-10-18T21:34:36.295Z",
"disclaimer": "Federal registration/safety data; verify insurance separately before tendering."
},
"basics": {
"query": {
"dot": "44110"
},
"found": true,
"carrier_group": "passenger",
"basics": [
{
"basic": "Unsafe Driving",
"percentile": 3,
"percentile_public": true,
"measure_value": 0.61,
"exceeded_intervention_threshold": false,
"acute_critical_violation": false,
"basic_alert": false,
"inspections_with_violation": 38
},
{
"basic": "Hours-of-Service Compliance",
"percentile": 49,
"percentile_public": true,
"measure_value": 0.12,
"exceeded_intervention_threshold": false,
"acute_critical_violation": false,
"basic_alert": false,
"inspections_with_violation": 41
},
{
"basic": "Driver Fitness",
"percentile": 57,
"percentile_public": true,
"measure_value": 0.07,
"exceeded_intervention_threshold": false,
"acute_critical_violation": true,
"basic_alert": true,
"inspections_with_violation": 7
}
],
"flags": [
"ACUTE_CRITICAL_DRIVER_FITNESS"
],
"data_quality_flags": [],
"inspections_24m": 797,
"driver_oos_inspections": 10,
"vehicle_oos_inspections": 24,
"verdict": "REVIEW",
"as_of": "2026-10-13T07:05:22.000Z",
"as_of_basis": "portal_publish_date",
"stale": false,
"source": "FMCSA SMS monthly results",
"retrieved_at": "2026-10-18T21:34:36.295Z",
"disclaimer": "Monthly FMCSA SMS snapshot. as_of_basis says whether as_of is the dataset snapshot date or the portal publish date. Property-carrier percentiles are not public. stale=true means the published data is old (data quality), not that the carrier is risky."
},
"broker": {
"skipped": true,
"reason": "no broker_mc given"
},
"ofac": {
"skipped": true,
"reason": "no legal name provided"
},
"sources": [
{
"name": "FMCSA QCMobile (US DOT, live)",
"as_of": "2026-10-18T21:34:36.295Z"
},
{
"name": "FMCSA SMS monthly results",
"as_of": "2026-10-13T07:05:22.000Z"
}
],
"method": "public FMCSA registration/SMS fields and OFAC name list only; no fraud score",
"disclaimer": "TENDER/HOLD/REJECT is a mechanical reading of public fields, not legal advice and not a risk model. Verify insurance and identity separately before tendering."
},
"channel": "zyla"
}
curl --location --request GET 'https://zylalabs.com/api/14343/fmcsa+carrier+vetting+api/35950/vet+load?dot=44110' --header 'Authorization: Bearer YOUR_API_KEY'
After signing up, every developer is assigned a personal API access key, a unique combination of letters and digits provided to access to our API endpoint. To authenticate with the FMCSA Carrier Vetting API simply include your bearer token in the Authorization header.
| Header | Description |
|---|---|
Authorization
|
Required
Should be Bearer access_key. See "Your API Access Key" above when you are subscribed.
|
No long-term commitment. Upgrade, downgrade, or cancel anytime.
Check US motor carriers against live FMCSA records: operating status, authority, safety rating, crash and inspection summary, plus a load vet pack combining authority, SMS BASICs, broker authority and an OFAC name screen.
Live FMCSA QCMobile registration records and the monthly FMCSA Safety Measurement System (SMS) snapshot. Every response cites its sources and as_of dates.
Hold_basis says why: carrier_risk (for example an acute or critical violation) or data_quality (the published safety data is stale, not a finding against the carrier).
FMCSA does not publish property-carrier percentiles or threshold alerts, so freight carriers are flagged only on acute or critical violations.
No. Verify insurance and identity separately before tendering.
To obtain your API key, first sign in to your account and navigate to the API you want to use. From the API's Pricing section, choose a plan and complete the subscription process. Once subscribed, return to the API page and you will see your API Access Key displayed at the top of the documentation page. You can use this key to authenticate your requests.
You can’t switch APIs during the free trial. If you subscribe to a different API, your trial will end and the new subscription will start as a paid plan.
The free trial lasts for 7 days and allows you to make up to 50 API requests.
No, the free trial is available only once, so we recommend using it on the API that interests you the most. Most of our APIs offer a free trial, but some may not include this option.
Yes. If the API offers a free trial, you will see a "Free 7-Day Trial" option in its Pricing section. The trial lasts for 7 days and allows up to 50 API requests, enabling you to evaluate the API before subscribing to a paid plan.
Zyla API Hub is like a big store for APIs, where you can find thousands of them all in one place. We also offer dedicated support and real-time monitoring of all APIs. Once you sign up, you can pick and choose which APIs you want to use. Just remember, each API needs its own subscription. But if you subscribe to multiple ones, you'll use the same key for all of them, making things easier for you.
You can monitor your API usage through the response headers included with every request:
x-zyla-api-calls-monthly-used: Shows the total number of API requests you have used during the current billing period.
x-zyla-api-calls-monthly-remaining: Shows the number of API requests you have remaining for the current billing period.
Yes, you can cancel your subscription at any time. Simply go to the Pricing section of the API you're subscribed to and click the "Unsubscribe" button.
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