FMCSA Carrier Check API

API ID 14105

Carrier change alerts via watchlists, one-call good/bad pickup check, truck lookup by plate or VIN, 100-carrier batches. Plus USDOT/MC lookups: authority, insurance, safety flags.

1,014 ms avg response

API Documentation

Endpoints

Request
Full carrier profile by USDOT number: identity, operation, fleet size, operating authority, insurance on file vs. required, roadside inspection counts and plain-language risk flags, with data_as_of timestamps.
Endpoint ID: 34849
GET https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34849/get+carrier+by+usdot
INPUT PARAMETERS

Get Carrier by USDOT — Endpoint Features

Object Description
USDOT Required

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

API EXAMPLE RESPONSE
JSON
{
    "usdot": "80806",
    "legal_name": "J B HUNT TRANSPORT INC",
    "dba_name": "J B HUNT",
    "operation": {
        "carrier_operation": "A",
        "hazmat": false,
        "passenger": false,
        "authorized_for_hire": true,
        "exempt_for_hire": false,
        "private_only": false
    },
    "address": {
        "physical": {
            "street": "615 J B HUNT CORPORATE DRIVE",
            "city": "LOWELL",
            "state": "AR",
            "zip": "72745",
            "country": "US"
        },
        "mailing": {
            "street": "615 J B HUNT CORPORATE DRIVE",
            "city": "LOWELL",
            "state": "AR",
            "zip": "72745",
            "country": "US"
        }
    },
    "contact": {
        "phone": "(479) 820-0000",
        "fax": "(479) 820-4566",
        "email": "[email protected]"
    },
    "fleet": {
        "power_units": 25280,
        "drivers": 24116
    },
    "registration": {
        "added_date": "1974-06-01",
        "days_registered": 19123,
        "mcs150_date": "2025-07-07"
    },
    "authority": [
        {
            "docket": "MC135797",
            "type": "Broker of Household Goods",
            "status": "Active"
        },
        {
            "docket": "MC135797",
            "type": "Motor Carrier of Property (Except Household Goods)",
            "status": "Active"
        },
        {
            "docket": "MC135797",
            "type": "Broker of Property (Except Household Goods)",
            "status": "Active"
        },
        {
            "docket": "MC135797",
            "type": "Motor Carrier of Household Goods",
            "status": "Active"
        }
    ],
    "insurance": {
        "bipd_required": 1000000,
        "bipd_on_file": 3500000,
        "cargo_required": true,
        "cargo_on_file": true,
        "bond_required": true,
        "bond_on_file": true,
        "filings": [
            {
                "docket": "MC135797",
                "type": "bipd",
                "type_code": "1",
                "form": "BMC-91X",
                "insurer": "Ace American Insurance Company",
                "policy_number": "XSAH11347472",
                "coverage": 2500000,
                "effective_date": "2025-12-31"
            },
            {
                "docket": "MC135797",
                "type": "bipd",
                "type_code": "1",
                "form": "BMC-91X",
                "insurer": "Self-Insured",
                "policy_number": "0",
                "coverage": 1000000,
                "effective_date": "1993-03-01"
            },
            {
                "docket": "MC135797",
                "type": "cargo",
                "type_code": "2",
                "form": "BMC-83",
                "insurer": "Travelers Casualty and Surety Company of America",
                "policy_number": "105917743",
                "coverage": 5000,
                "effective_date": "2023-10-23"
            },
            {
                "docket": "MC135797",
                "type": "surety_bond",
                "type_code": "3",
                "form": "BMC-84",
                "insurer": "Travelers Casualty and Surety Company of America",
                "policy_number": "105917743",
                "coverage": 75000,
                "effective_date": "2014-01-13"
            },
            {
                "docket": "MC135797",
                "type": "bipd",
                "type_code": "1",
                "form": "BMC-91X",
                "insurer": "Palisades Insurance Company",
                "policy_number": "NONE",
                "coverage": 1000000,
                "effective_date": "1993-03-01"
            }
        ]
    },
    "inspections_24m": {
        "total": 20263,
        "with_oos": 2626
    },
    "flags": [],
    "sources": {
        "census": "fmcsa_census",
        "authority_insurance": "fmcsa_motus"
    },
    "data_as_of": {
        "census": "2026-09-13T07:08:36.000Z",
        "authority_insurance": "2026-10-09T14:34:43.000Z"
    },
    "disclaimer": "Provided for information only. Not a compliance determination; confirm official status before dispatch."
}
Get Carrier by USDOT — CODE SNIPPETS

curl --location --request GET 'https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34849/get+carrier+by+usdot&USDOT=Required' --header 'Authorization: Bearer YOUR_API_KEY' 


    
Request
Same full carrier profile as Get Carrier by USDOT, looked up by MC, MX or FF docket number. Accepts MC-138328, MC138328 or just 138328. Returns authority, insurance on file vs. required, inspections and risk flags.
Endpoint ID: 34850
GET https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34850/get+carrier+by+mc
INPUT PARAMETERS

Get Carrier by MC — Endpoint Features

Object Description
MC Required

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

API EXAMPLE RESPONSE
JSON
{
    "docket": "MC138328",
    "carriers": [
        {
            "usdot": "53467",
            "legal_name": "WERNER ENTERPRISES INC",
            "dba_name": null,
            "operation": {
                "carrier_operation": "A",
                "hazmat": false,
                "passenger": false,
                "authorized_for_hire": true,
                "exempt_for_hire": false,
                "private_only": false
            },
            "address": {
                "physical": {
                    "street": "14507 FRONTIER ROAD",
                    "city": "OMAHA",
                    "state": "NE",
                    "zip": "68138",
                    "country": "US"
                },
                "mailing": {
                    "street": "PO BOX 45308",
                    "city": "OMAHA",
                    "state": "NE",
                    "zip": "68145-0308",
                    "country": "US"
                }
            },
            "contact": {
                "phone": "(402) 895-6640",
                "fax": "(402) 894-3769",
                "email": "[email protected]"
            },
            "fleet": {
                "power_units": 9851,
                "drivers": 9107
            },
            "registration": {
                "added_date": "1974-06-01",
                "days_registered": 19121,
                "mcs150_date": "2024-07-23"
            },
            "authority": [
                {
                    "docket": "MC138328",
                    "type": "Motor Carrier of Property (Except Household Goods)",
                    "status": "Active"
                },
                {
                    "docket": "MC138328",
                    "type": "Broker of Property (Except Household Goods)",
                    "status": "Active"
                }
            ],
            "insurance": {
                "bipd_required": 1000000,
                "bipd_on_file": 5000000,
                "cargo_required": false,
                "cargo_on_file": false,
                "bond_required": true,
                "bond_on_file": true,
                "filings": [
                    {
                        "docket": "MC138328",
                        "type": "bipd",
                        "type_code": "1",
                        "form": "BMC-91X",
                        "insurer": "Ace American Insurance Company",
                        "policy_number": "XSAH11428927",
                        "coverage": 4000000,
                        "effective_date": "2025-08-01"
                    },
                    {
                        "docket": "MC138328",
                        "type": "bipd",
                        "type_code": "1",
                        "form": "BMC-91X",
                        "insurer": "Self-Insured",
                        "policy_number": "0",
                        "coverage": 1000000,
                        "effective_date": "1998-06-10"
                    },
                    {
                        "docket": "MC138328",
                        "type": "surety_bond",
                        "type_code": "3",
                        "form": "BMC-84",
                        "insurer": "Travelers Casualty and Surety Company of America",
                        "policy_number": "106001707",
                        "coverage": 75000,
                        "effective_date": "2013-10-01"
                    },
                    {
                        "docket": "MC138328",
                        "type": "bipd",
                        "type_code": "1",
                        "form": "BMC-91X",
                        "insurer": "Palisades Insurance Company",
                        "policy_number": "00000",
                        "coverage": 1000000,
                        "effective_date": "1993-03-15"
                    }
                ]
            },
            "inspections_24m": {
                "total": 11701,
                "with_oos": 1369
            },
            "flags": [
                "mcs150_outdated"
            ],
            "sources": {
                "census": "fmcsa_census",
                "authority_insurance": "fmcsa_motus"
            },
            "data_as_of": {
                "census": "2026-09-13T07:08:36.000Z",
                "authority_insurance": "2026-10-07T10:58:30.000Z"
            }
        }
    ],
    "disclaimer": "Provided for information only. Not a compliance determination; confirm official status before dispatch."
}
Get Carrier by MC — CODE SNIPPETS

curl --location --request GET 'https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34850/get+carrier+by+mc&MC=Required' --header 'Authorization: Bearer YOUR_API_KEY' 


    
Request
Search carriers by legal or DBA name, with an optional two-letter state filter. Returns up to 50 matches with USDOT number, legal name, DBA, city, state and power units. Use the USDOT number to fetch the full profile.
Endpoint ID: 34851
GET https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34851/search+carriers
INPUT PARAMETERS

Search Carriers — Endpoint Features

Object Description
name Required Legal or DBA name to search for (minimum 3 characters).
state Optional Optional two-letter state code to narrow the results.
limit Optional Optional maximum number of results (up to 50).

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

name
state
limit
API EXAMPLE RESPONSE
JSON
{
    "query": "werner enterprises",
    "count": 1,
    "results": [
        {
            "usdot": "53467",
            "legal_name": "WERNER ENTERPRISES INC",
            "dba_name": null,
            "city": "OMAHA",
            "state": "NE",
            "power_units": 9851
        }
    ]
}
Search Carriers — CODE SNIPPETS

curl --location --request GET 'https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34851/search+carriers?name=werner enterprises&state=NE&limit=10' --header 'Authorization: Bearer YOUR_API_KEY' 


    
Request
Find which carriers a truck or trailer has been inspected under, by license plate plus state, or by VIN. Returns the carriers with inspection counts and first and last dates seen. Based on FMCSA roadside inspection records, so a vehicle that has never been inspected will not be found.
Endpoint ID: 34852
GET https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34852/find+vehicle
INPUT PARAMETERS

Find Vehicle — Endpoint Features

Object Description
plate Optional License plate. Use together with state. Provide either plate and state, or vin.
state Optional Two-letter state of the license plate.
vin Optional 17-character VIN. Use instead of plate and state. A VIN is more reliable because plates change.

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

plate
state
vin
API EXAMPLE RESPONSE
JSON
{
    "query": {
        "plate": "AF60214",
        "state": "PA"
    },
    "vehicle": {
        "vins": [
            "1NKWXPTX1KJ245229"
        ],
        "plates": [
            {
                "plate": "AF60214",
                "state": "PA"
            }
        ],
        "make": "KW"
    },
    "carriers": [
        {
            "usdot": "1398624",
            "name_at_inspection": "DMP TRUCKING INC",
            "inspections": 4,
            "first_seen": "2024-02-02",
            "last_seen": "2025-12-23"
        }
    ],
    "coverage_note": "Vehicle data comes from roadside inspection records. A vehicle that has never been inspected will not be found."
}
Find Vehicle — CODE SNIPPETS

curl --location --request GET 'https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34852/find+vehicle?plate=AF60214&state=PA' --header 'Authorization: Bearer YOUR_API_KEY' 


    
Request
Does this truck belong to the carrier you booked? Send the USDOT you booked and the plate (with state) or VIN of the truck at pickup. Returns match, seen_under_carrier, different_carrier or not_found, with inspection counts and dates as evidence. A direct check against double brokering and carrier identity theft.
Endpoint ID: 34853
GET https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34853/verify+truck
INPUT PARAMETERS

Verify Truck — Endpoint Features

Object Description
usdot Required USDOT number of the carrier you booked.
plate Optional License plate of the truck at pickup. Use together with state, or provide vin instead.
state Optional Two-letter state of the license plate.
vin Optional VIN of the truck. Use instead of plate and state.

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

usdot
plate
state
vin
API EXAMPLE RESPONSE
JSON
{
    "usdot": "1398624",
    "query": {
        "vin": "1NKWXPTX1KJ245229"
    },
    "result": "match",
    "evidence": {
        "usdot": "1398624",
        "name_at_inspection": "DMP TRUCKING INC",
        "inspections": 4,
        "first_seen": "2024-02-02",
        "last_seen": "2025-12-23"
    },
    "vehicle": {
        "vins": [
            "1NKWXPTX1KJ245229"
        ],
        "plates": [
            {
                "plate": "AF60214",
                "state": "PA"
            }
        ],
        "make": "KW"
    },
    "coverage_note": "Vehicle data comes from roadside inspection records. A vehicle that has never been inspected will not be found.",
    "disclaimer": "Provided for information only. Not a compliance determination; confirm official status before dispatch."
}
Verify Truck — CODE SNIPPETS

curl --location --request GET 'https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34853/verify+truck?usdot=1398624&plate=AF60214&state=PA&vin=1NKWXPTX1KJ245229' --header 'Authorization: Bearer YOUR_API_KEY' 


    
Request
One call, good or bad: checks carrier authority, insurance and risk flags plus the truck match, and returns a verdict with the reasons and warnings behind it. Add strict=true to treat every warning as a failure.
Endpoint ID: 34854
GET https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34854/check+pickup
INPUT PARAMETERS

Check Pickup — Endpoint Features

Object Description
usdot Required USDOT number of the carrier you booked.
plate Optional License plate of the truck at pickup. Use together with state, or provide vin instead.
state Optional Two-letter state of the license plate.
vin Optional VIN of the truck. Use instead of plate and state.
strict Optional Set to true to treat every warning as a failure.

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

usdot
plate
state
vin
strict
API EXAMPLE RESPONSE
JSON
{
    "verdict": "good",
    "usdot": "1398624",
    "legal_name": "DMP TRUCKING INC",
    "strict": false,
    "summary": "Good: authority active, insurance OK, truck matches (4 inspections, last seen 2025-12-23). 1 warning.",
    "reasons": [],
    "warnings": [
        "authority_data_from_frozen_legacy_files"
    ],
    "checks": [
        {
            "check": "census",
            "status": "pass"
        },
        {
            "check": "authority",
            "status": "pass"
        },
        {
            "check": "insurance",
            "status": "pass"
        },
        {
            "check": "registration_age",
            "status": "pass"
        },
        {
            "check": "mcs150",
            "status": "pass"
        },
        {
            "check": "inspections",
            "status": "pass"
        },
        {
            "check": "data_source",
            "status": "warn"
        },
        {
            "check": "truck",
            "status": "pass"
        }
    ],
    "carrier": {
        "authority_active": true,
        "insurance_ok": true,
        "flags": [
            "authority_data_from_frozen_legacy_files"
        ],
        "authority": [
            {
                "docket": "MC558665",
                "type": "common",
                "status": "Active",
                "application_pending": false,
                "revocation_pending": false
            }
        ],
        "insurance": {
            "bipd_required": 750000,
            "bipd_on_file": 750000,
            "cargo_required": false,
            "cargo_on_file": false,
            "bond_required": false,
            "bond_on_file": false
        },
        "days_registered": 7744,
        "inspections_24m": {
            "total": 3,
            "with_oos": 0
        }
    },
    "truck": {
        "result": "match",
        "verified": true,
        "last_seen": "2025-12-23",
        "inspections": 4,
        "most_recent_carrier": null
    },
    "data_as_of": {
        "census": "2026-09-13T07:08:36.000Z",
        "authority_insurance": "2026-10-07T10:58:30.000Z"
    },
    "disclaimer": "Provided for information only. Not a compliance determination; confirm official status before dispatch."
}
Check Pickup — CODE SNIPPETS

curl --location --request GET 'https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34854/check+pickup?usdot=1398624&plate=AF60214&state=PA&strict=false' --header 'Authorization: Bearer YOUR_API_KEY' 


    
Request
Get up to 100 carrier profiles in a single request. Send a JSON body with a usdot array; results come back in the order sent. A whole morning sweep of the day's carriers is one call and counts as one request.
Endpoint ID: 34855
POST https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34855/batch+carriers
INPUT PARAMETERS

Batch Carriers — Endpoint Features

Object Description
Request Body Required Json

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

API EXAMPLE RESPONSE
JSON
{
    "count": 2,
    "results": [
        {
            "usdot": "53467",
            "legal_name": "WERNER ENTERPRISES INC",
            "dba_name": null,
            "operation": {
                "carrier_operation": "A",
                "hazmat": false,
                "passenger": false,
                "authorized_for_hire": true,
                "exempt_for_hire": false,
                "private_only": false
            },
            "address": {
                "physical": {
                    "street": "14507 FRONTIER ROAD",
                    "city": "OMAHA",
                    "state": "NE",
                    "zip": "68138",
                    "country": "US"
                },
                "mailing": {
                    "street": "PO BOX 45308",
                    "city": "OMAHA",
                    "state": "NE",
                    "zip": "68145-0308",
                    "country": "US"
                }
            },
            "contact": {
                "phone": "(402) 895-6640",
                "fax": "(402) 894-3769",
                "email": "[email protected]"
            },
            "fleet": {
                "power_units": 9851,
                "drivers": 9107
            },
            "registration": {
                "added_date": "1974-06-01",
                "days_registered": 19121,
                "mcs150_date": "2024-07-23"
            },
            "authority": [
                {
                    "docket": "MC138328",
                    "type": "Motor Carrier of Property (Except Household Goods)",
                    "status": "Active"
                },
                {
                    "docket": "MC138328",
                    "type": "Broker of Property (Except Household Goods)",
                    "status": "Active"
                }
            ],
            "insurance": {
                "bipd_required": 1000000,
                "bipd_on_file": 5000000,
                "cargo_required": false,
                "cargo_on_file": false,
                "bond_required": true,
                "bond_on_file": true,
                "filings": [
                    {
                        "docket": "MC138328",
                        "type": "bipd",
                        "type_code": "1",
                        "form": "BMC-91X",
                        "insurer": "Ace American Insurance Company",
                        "policy_number": "XSAH11428927",
                        "coverage": 4000000,
                        "effective_date": "2025-08-01"
                    },
                    {
                        "docket": "MC138328",
                        "type": "bipd",
                        "type_code": "1",
                        "form": "BMC-91X",
                        "insurer": "Self-Insured",
                        "policy_number": "0",
                        "coverage": 1000000,
                        "effective_date": "1998-06-10"
                    },
                    {
                        "docket": "MC138328",
                        "type": "surety_bond",
                        "type_code": "3",
                        "form": "BMC-84",
                        "insurer": "Travelers Casualty and Surety Company of America",
                        "policy_number": "106001707",
                        "coverage": 75000,
                        "effective_date": "2013-10-01"
                    },
                    {
                        "docket": "MC138328",
                        "type": "bipd",
                        "type_code": "1",
                        "form": "BMC-91X",
                        "insurer": "Palisades Insurance Company",
                        "policy_number": "00000",
                        "coverage": 1000000,
                        "effective_date": "1993-03-15"
                    }
                ]
            },
            "inspections_24m": {
                "total": 11701,
                "with_oos": 1369
            },
            "flags": [
                "mcs150_outdated"
            ],
            "sources": {
                "census": "fmcsa_census",
                "authority_insurance": "fmcsa_motus"
            },
            "data_as_of": {
                "census": "2026-09-13T07:08:36.000Z",
                "authority_insurance": "2026-10-07T10:58:30.000Z"
            }
        },
        {
            "usdot": "1398624",
            "legal_name": "DMP TRUCKING INC",
            "dba_name": "DMP TRUCKING",
            "operation": {
                "carrier_operation": "A",
                "hazmat": false,
                "passenger": false,
                "authorized_for_hire": true,
                "exempt_for_hire": false,
                "private_only": false
            },
            "address": {
                "physical": {
                    "street": "1043 SCHULTZ RD",
                    "city": "EAST NORRITON",
                    "state": "PA",
                    "zip": "19403",
                    "country": "US"
                },
                "mailing": {
                    "street": "PO BOX 121",
                    "city": "EAGLESVILLE",
                    "state": "PA",
                    "zip": "19408",
                    "country": "US"
                }
            },
            "contact": {
                "phone": "(610) 304-0341",
                "fax": "(610) 279-1252",
                "email": "[email protected]"
            },
            "fleet": {
                "power_units": 1,
                "drivers": 1
            },
            "registration": {
                "added_date": "2005-07-25",
                "days_registered": 7744,
                "mcs150_date": "2025-06-16"
            },
            "authority": [
                {
                    "docket": "MC558665",
                    "type": "common",
                    "status": "Active",
                    "application_pending": false,
                    "revocation_pending": false
                }
            ],
            "insurance": {
                "bipd_required": 750000,
                "bipd_on_file": 750000,
                "cargo_required": false,
                "cargo_on_file": false,
                "bond_required": false,
                "bond_on_file": false,
                "filings": [
                    {
                        "docket": "MC558665",
                        "type": "bipd",
                        "type_code": "1",
                        "form": "91X",
                        "insurer": "EASTERN ATLANTIC INSURANCE COMPANY",
                        "policy_number": "TEA370124125",
                        "coverage": 750000,
                        "effective_date": "2025-10-25"
                    }
                ]
            },
            "inspections_24m": {
                "total": 3,
                "with_oos": 0
            },
            "flags": [
                "authority_data_from_frozen_legacy_files"
            ],
            "sources": {
                "census": "fmcsa_census",
                "authority_insurance": "fmcsa_legacy_li_frozen_2026-05-14"
            },
            "data_as_of": {
                "census": "2026-09-13T07:08:36.000Z",
                "authority_insurance": "2026-10-07T10:58:30.000Z"
            }
        }
    ],
    "disclaimer": "Provided for information only. Not a compliance determination; confirm official status before dispatch."
}
Batch Carriers — CODE SNIPPETS

curl --location --request POST 'https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34855/batch+carriers' --header 'Authorization: Bearer YOUR_API_KEY' 

--data-raw '{"usdot":["53467","1398624"]}'

    
Request
Create a watchlist of carriers and get their authority, insurance and contact changes through the changes endpoint. Optionally add USDOT numbers in the body. Identify your account with the watchlist_key parameter.
Endpoint ID: 34950
POST https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34950/create+watchlist
INPUT PARAMETERS

Create Watchlist — Endpoint Features

Object Description
watchlist_key Required A secret you choose, 16 to 200 characters. It identifies your watchlists. Keep it private and use the same key for all watchlist calls.
Request Body Required Json

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

watchlist_key
API EXAMPLE RESPONSE
JSON
{
    "id": "wl_2b0da2b6aab9e1ad",
    "name": "Core lanes",
    "created_at": "2026-10-09T16:15:25.396Z",
    "webhook": null,
    "added": [
        "53467",
        "1398624"
    ],
    "already_on_list": [],
    "not_found": [],
    "usage": {
        "plan": "BASIC",
        "watched_carriers": 2,
        "max_carriers": 10,
        "webhooks": false
    }
}
Create Watchlist — CODE SNIPPETS

curl --location --request POST 'https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34950/create+watchlist?watchlist_key=zyla-test-watchlist-key-0001' --header 'Authorization: Bearer YOUR_API_KEY' 

--data-raw '{"name": "Core lanes", "carriers": ["53467", "1398624"]}'

    
Request
Add up to 500 carriers, by USDOT number, to a watchlist. Each new number is checked against the carrier records and saved as a baseline, so changes are reported from the next daily run. Unknown numbers are returned in not_found.
Endpoint ID: 34951
POST https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34951/add+carriers+to+watchlist
INPUT PARAMETERS

Add Carriers to Watchlist — Endpoint Features

Object Description
watchlist_key Required A secret you choose, 16 to 200 characters. It identifies your watchlists. Keep it private and use the same key for all watchlist calls.
Request Body Required Json
ID Required

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

watchlist_key
API EXAMPLE RESPONSE
JSON
{
    "id": "wl_2b0da2b6aab9e1ad",
    "added": [
        "2247806"
    ],
    "already_on_list": [],
    "not_found": [
        "99999999"
    ],
    "usage": {
        "plan": "BASIC",
        "watched_carriers": 3,
        "max_carriers": 10,
        "webhooks": false
    }
}
Add Carriers to Watchlist — CODE SNIPPETS

curl --location --request POST 'https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34951/add+carriers+to+watchlist?watchlist_key=zyla-test-watchlist-key-0001&ID=Required' --header 'Authorization: Bearer YOUR_API_KEY' 

--data-raw '{"carriers": ["2247806", "99999999"]}'

    
Request
List your watchlists with their carrier counts and webhook settings, plus your usage: the plan, carriers watched and the maximum your plan allows. Identify your account with the watchlist_key parameter.
Endpoint ID: 34952
GET https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34952/list+watchlists
INPUT PARAMETERS

List Watchlists — Endpoint Features

Object Description
watchlist_key Required A secret you choose, 16 to 200 characters. It identifies your watchlists. Keep it private and use the same key for all watchlist calls.

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

watchlist_key
API EXAMPLE RESPONSE
JSON
{
    "count": 1,
    "watchlists": [
        {
            "id": "wl_2b0da2b6aab9e1ad",
            "name": "Core lanes",
            "created_at": "2026-10-09T16:15:25.396Z",
            "carriers": 3,
            "webhook": null
        }
    ],
    "usage": {
        "plan": "BASIC",
        "watched_carriers": 3,
        "max_carriers": 10,
        "webhooks": false
    }
}
List Watchlists — CODE SNIPPETS

curl --location --request GET 'https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34952/list+watchlists?watchlist_key=zyla-test-watchlist-key-0001' --header 'Authorization: Bearer YOUR_API_KEY' 


    
Request
One watchlist with its carriers: legal name, when each was added, last checked and last changed. Paged with limit and cursor. Identify your account with the watchlist_key parameter.
Endpoint ID: 34953
GET https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34953/get+watchlist
INPUT PARAMETERS

Get Watchlist — Endpoint Features

Object Description
watchlist_key Required A secret you choose, 16 to 200 characters. It identifies your watchlists. Keep it private and use the same key for all watchlist calls.
ID Required

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

watchlist_key
API EXAMPLE RESPONSE
JSON
{
    "id": "wl_2b0da2b6aab9e1ad",
    "name": "Core lanes",
    "created_at": "2026-10-09T16:15:25.396Z",
    "webhook": null,
    "carrier_count": 3,
    "carriers": [
        {
            "usdot": "53467",
            "legal_name": "WERNER ENTERPRISES INC",
            "added_at": "2026-10-09T16:15:25.396Z",
            "last_checked": "2026-10-08T18:30:45.073Z",
            "last_changed": null
        },
        {
            "usdot": "1398624",
            "legal_name": "DMP TRUCKING INC",
            "added_at": "2026-10-09T16:15:25.396Z",
            "last_checked": "2026-10-08T18:30:45.073Z",
            "last_changed": null
        },
        {
            "usdot": "2247806",
            "legal_name": "KISHK TRANSPORTATION, INC.",
            "added_at": "2026-10-09T16:23:08.378Z",
            "last_checked": "2026-10-09T16:23:08.378Z",
            "last_changed": null
        }
    ],
    "next_cursor": null,
    "usage": {
        "plan": "BASIC",
        "watched_carriers": 3,
        "max_carriers": 10,
        "webhooks": false
    }
}
Get Watchlist — CODE SNIPPETS

curl --location --request GET 'https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34953/get+watchlist?watchlist_key=zyla-test-watchlist-key-0001&ID=Required' --header 'Authorization: Bearer YOUR_API_KEY' 


    
Request
Rename a watchlist, or change its minimum alert severity. Webhooks need a plan that includes them. Identify your account with the watchlist_key parameter.
Endpoint ID: 34954
PATCH https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34954/update+watchlist
INPUT PARAMETERS

Update Watchlist — Endpoint Features

Object Description
watchlist_key Required A secret you choose, 16 to 200 characters. It identifies your watchlists. Keep it private and use the same key for all watchlist calls.
Request Body Required Json
ID Required

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

watchlist_key
API EXAMPLE RESPONSE
JSON
{
    "id": "wl_2b0da2b6aab9e1ad",
    "name": "Core lanes",
    "created_at": "2026-10-09T16:15:25.396Z",
    "webhook": null
}
Update Watchlist — CODE SNIPPETS

curl --location --request PATCH 'https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34954/update+watchlist?watchlist_key=zyla-test-watchlist-key-0001&ID=Required' --header 'Authorization: Bearer YOUR_API_KEY' 

--data-raw '{"name": "Core lanes", "webhook_min_severity": "high"}'

    
Request
What changed for the carriers on a watchlist: authority, insurance, contact, name and address, each with a severity. Filter with since (24h, 7d or a date) and min_severity (low, medium, high, critical). Pull it once a day.
Endpoint ID: 34955
GET https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34955/get+watchlist+changes
INPUT PARAMETERS

Get Watchlist Changes — Endpoint Features

Object Description
watchlist_key Required A secret you choose, 16 to 200 characters. It identifies your watchlists. Keep it private and use the same key for all watchlist calls.
since Optional How far back to look: 24h, 7d or an ISO date. Default 24h.
min_severity Optional Only return changes at or above this severity: low, medium, high or critical. Default low.
ID Required

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

watchlist_key
since
min_severity
API EXAMPLE RESPONSE
JSON
{
    "watchlist_id": "wl_2b0da2b6aab9e1ad",
    "since": "2026-10-02T16:37:02.295Z",
    "min_severity": "low",
    "last_checked": "2026-10-09T16:23:08.378Z",
    "count": 0,
    "changes": [],
    "next_cursor": null,
    "disclaimer": "Provided for information only. Not a compliance determination; confirm official status before dispatch."
}
Get Watchlist Changes — CODE SNIPPETS

curl --location --request GET 'https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34955/get+watchlist+changes?watchlist_key=zyla-test-watchlist-key-0001&since=7d&min_severity=low&ID=Required' --header 'Authorization: Bearer YOUR_API_KEY' 


    
Request
Recent webhook deliveries for a watchlist: each event with its status (delivered, pending or failed), attempts, last HTTP status and error. Use limit to page. Identify your account with the watchlist_key parameter.
Endpoint ID: 34956
GET https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34956/list+watchlist+deliveries
INPUT PARAMETERS

List Watchlist Deliveries — Endpoint Features

Object Description
watchlist_key Required A secret you choose, 16 to 200 characters. It identifies your watchlists. Keep it private and use the same key for all watchlist calls.
ID Required

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

watchlist_key
API EXAMPLE RESPONSE
JSON
{
    "watchlist_id": "wl_2b0da2b6aab9e1ad",
    "count": 0,
    "deliveries": []
}
List Watchlist Deliveries — CODE SNIPPETS

curl --location --request GET 'https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34956/list+watchlist+deliveries?watchlist_key=zyla-test-watchlist-key-0001&ID=Required' --header 'Authorization: Bearer YOUR_API_KEY' 


    
Request
Remove one carrier, by USDOT number, from a watchlist. It stops counting against your plan once it is on none of your lists. Identify your account with the watchlist_key parameter.
Endpoint ID: 34957
DELETE https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34957/remove+carrier+from+watchlist
INPUT PARAMETERS

Remove Carrier from Watchlist — Endpoint Features

Object Description
watchlist_key Required A secret you choose, 16 to 200 characters. It identifies your watchlists. Keep it private and use the same key for all watchlist calls.
ID Required
USDOT Required

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

watchlist_key
API EXAMPLE RESPONSE
JSON
{
    "id": "wl_2b0da2b6aab9e1ad",
    "removed": "2247806",
    "usage": {
        "plan": "BASIC",
        "watched_carriers": 2,
        "max_carriers": 10,
        "webhooks": false
    }
}
Remove Carrier from Watchlist — CODE SNIPPETS

curl --location --request DELETE 'https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34957/remove+carrier+from+watchlist?watchlist_key=zyla-test-watchlist-key-0001&ID=Required&/carriers/=Required&USDOT=Required' --header 'Authorization: Bearer YOUR_API_KEY' 


    
Request
Delete a watchlist and its webhook. The carriers stay tracked, but they no longer count against your plan once they are on no list. Identify your account with the watchlist_key parameter.
Endpoint ID: 34958
DELETE https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34958/delete+watchlist
INPUT PARAMETERS

Delete Watchlist — Endpoint Features

Object Description
watchlist_key Required A secret you choose, 16 to 200 characters. It identifies your watchlists. Keep it private and use the same key for all watchlist calls.
ID Required

Free test requests remaining: 3 of 3.


INPUT PARAMETERS

watchlist_key
API EXAMPLE RESPONSE
JSON
{
    "id": "wl_2b0da2b6aab9e1ad",
    "deleted": true
}
Delete Watchlist — CODE SNIPPETS

curl --location --request DELETE 'https://zylalabs.com/api/14105/fmcsa+carrier+check+api/34958/delete+watchlist?watchlist_key=zyla-test-watchlist-key-0001&ID=Required' --header 'Authorization: Bearer YOUR_API_KEY' 


    

API Access Key & Authentication

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 Check API simply include your bearer token in the Authorization header.

Headers
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. Free Trial includes up to 50 requests.

Starts at
$10,000/Year


  • Custom Volume
  • Custom Rate Limit
  • Specialized Customer Support
  • Real-Time API Monitoring

Overview

Carrier change alerts via watchlists, one-call good/bad pickup check, truck lookup by plate or VIN, 100-carrier batches. Plus USDOT/MC lookups: authority, insurance, safety flags.

FMCSA Carrier Check API FAQs

All data comes from FMCSA public datasets. Operating authority and insurance come from FMCSA's Motus system and update daily. Census data such as identity and fleet size updates about monthly. Every response includes data_as_of timestamps, and responses are cached for up to 6 hours.

Use the Verify Truck endpoint with the USDOT number you booked and the plate and state or the VIN of the truck. It checks FMCSA roadside inspection records and returns match, seen_under_carrier, different_carrier or not_found, with inspection counts and dates as evidence. The Check Pickup endpoint does this plus the authority and insurance check in one call and returns a verdict with reasons.

No. Plate and VIN results come from roadside inspection records, so a truck that has never been inspected will not be found. Try the VIN if a plate is not found, since plates change and VINs do not. The data is for information only and is not a legal or compliance determination.

Each endpoint returns detailed carrier information, including identity, operation, fleet size, authority, insurance status, inspection counts, and risk flags. For example, the Get Carrier by USDOT endpoint provides a full profile based on the USDOT number, while the Find Vehicle endpoint returns inspection history linked to a specific truck or trailer.

Key fields include "usdot," "legal_name," "operation" (with subfields like "authorized_for_hire"), "address," "contact," and "fleet" (showing power units and drivers). Each endpoint's response structure varies slightly but generally includes these essential fields for comprehensive carrier profiles.

Create a watchlist with the Create Watchlist endpoint and add carriers by USDOT number. Every day, after the FMCSA data refresh, each watched carrier is compared with its previous record, and every difference is saved as a change with a severity: critical (authority inactive or revoked soon, insurance below the required minimum or cancelled), high (phone or email), medium (name or address) or low (renewals, large fleet changes). Call Get Watchlist Changes once a day to read what changed, filtering with since and min_severity.

Each endpoint provides unique data: Get Carrier by USDOT and MC return full carrier profiles; Search Carriers allows searching by name; Find Vehicle shows inspection history; Verify Truck checks truck ownership; Check Pickup assesses carrier authority and insurance; Batch Carriers retrieves multiple profiles in one request.

Parameters vary by endpoint. For example, Get Carrier by USDOT requires a USDOT number, while Find Vehicle accepts a license plate and state or VIN. The Check Pickup endpoint allows a strict mode parameter to enforce stricter validation. Users can customize requests based on their specific needs.

Every watchlist call needs the watchlist_key parameter. It is a secret that you choose yourself, 16 to 200 characters, for example a random string from a password generator. It identifies your watchlists, so keep it private and send the same key on every watchlist call. Anyone who has the key can read and change those watchlists. Watchlists on this listing hold up to 10 carriers and are read by pulling Get Watchlist Changes.

Data accuracy is maintained through regular updates from FMCSA public datasets. The API utilizes the Motus system for authority and insurance data, ensuring that information is current. Additionally, each response includes "data_as_of" timestamps to indicate the freshness of the data.

Typical use cases include verifying carrier compliance before shipment, checking vehicle inspection history for safety assessments, and conducting due diligence on carriers during freight booking. The API supports logistics companies, brokers, and fleet managers in making informed decisions.

General FAQs

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.

Prices are listed in USD (United States Dollar), EUR (Euro), CAD (Canadian Dollar), AUD (Australian Dollar), and GBP (British Pound). We accept all major debit and credit cards. Our payment system uses the latest security technology and is powered by Stripe, one of the world's most reliable payment companies. If you have any trouble paying by card, just contact us at [email protected]

Additionally, if you already have an active subscription in any of these currencies (USD, EUR, CAD, AUD, GBP), that currency will remain for subsequent subscriptions. You can change the currency at any time as long as you don't have any active subscriptions.
The local currency shown on the pricing page is based on the country of your IP address and is provided for reference only. The actual prices are in USD (United States Dollar). When you make a payment, the charge will appear on your card statement in USD, even if you see the equivalent amount in your local currency on our website. This means you cannot pay directly with your local currency.
Occasionally, a bank may decline the charge due to its fraud protection settings. We suggest reaching out to your bank initially to check if they are blocking our charges. Also, you can access the Billing Portal and change the card associated to make the payment. If these does not work and you need further assistance, please contact our team at [email protected]
Prices are determined by a recurring monthly or yearly subscription, depending on the chosen plan.
API calls are deducted from your plan based on successful requests. Each plan comes with a specific number of calls that you can make per month. Only successful calls, indicated by a Status 200 response, will be counted against your total. This ensures that failed or incomplete requests do not impact your monthly quota.
Zyla API Hub works on a recurring monthly subscription system. Your billing cycle will start the day you purchase one of the paid plans, and it will renew the same day of the next month. So be aware to cancel your subscription beforehand if you want to avoid future charges.
To upgrade your current subscription plan, simply go to the pricing page of the API and select the plan you want to upgrade to. The upgrade will be instant, allowing you to immediately enjoy the features of the new plan. Please note that any remaining calls from your previous plan will not be carried over to the new plan, so be aware of this when upgrading. You will be charged the full amount of the new plan.
To check how many API calls you have left for the current month, refer to the 'X-Zyla-API-Calls-Monthly-Remaining' field in the response header. For example, if your plan allows 1,000 requests per month and you've used 100, this field in the response header will indicate 900 remaining calls.

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.

The 'X-Zyla-RateLimit-Reset' header shows the number of seconds until your rate limit resets. This tells you when your request count will start fresh. For example, if it displays 3,600, it means 3,600 seconds are left until the limit resets.

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.

Please note that upgrades, downgrades, and cancellations take effect immediately. Once your subscription is canceled, access to the service will end immediately, regardless of any remaining API calls in your quota.

After 7 days, you will be charged the full amount for the plan you were subscribed to during the trial. Therefore, it's important to cancel before the trial period ends. Refund requests for forgetting to cancel on time are not accepted.
When you subscribe to an API free trial, you can make up to 50 API calls. If you wish to make additional API calls beyond this limit, the API will prompt you to perform an "Start Your Paid Plan." You can find the "Start Your Paid Plan" button in your profile under Subscription -> Choose the API you are subscribed to -> Pricing tab.
You can contact us through our chat channel to receive immediate assistance. We are always online from 8 am to 5 pm (EST). If you reach us after that time, we will get back to you as soon as possible. Additionally, you can contact us via email at [email protected]

Please have a look at our Refund Policy: https://zylalabs.com/terms#refund


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