---
title: "FMCSA API Documentation — Endpoints & Reference | AlphaLoops"
description: "API reference for the AlphaLoops FMCSA carrier API: carrier lookup, safety, authority, and search endpoints, with auth, response formats, and code examples."
lang: en
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[FMCSA API](/fmcsa-api)

# FMCSA API Documentation

Complete reference for AlphaLoops's carrier data API. Look up carriers by DOT number, MC number, or name. Access safety data, authority status, technology stack, and more.

Enterprise Plan API access is available exclusively on our Enterprise plan. 

New to FMCSA data? [Start with our complete guide →](/fmcsa-api/guide)

Copy Documentation to Clipboard[OpenAPI Spec](/openapi.json)

## Quick Start

### Base URL

`https://api.runalphaloops.com`Copy

### Authentication

Include your API key in the `Authorization` header:

`Authorization: Bearer YOUR_API_KEY`Copy

### Rate Limits

Enterprise API access includes **60 requests per minute** and **5,000 requests per day**. Need more? Additional credits are available for purchase. Rate limit headers are included in every response:

`X-RateLimit-Limit: 60 X-RateLimit-Remaining: 47 X-RateLimit-Reset: 1709325600 X-DailyLimit-Limit: 5000 X-DailyLimit-Remaining: 4832 X-DailyLimit-Reset: 1709337600`

## Endpoints

GET `/v1/carriers/{dot_number}`

Look up a carrier by DOT number. Returns the full carrier profile with 200+ fields. Use the fields parameter to project only the fields you need.

#### Parameters

Name

Type

Required

Description

dot\_number

string

Yes 

The carrier's USDOT number

fields

string

No 

Comma-separated list of fields to return (e.g. "legal\_name,power\_units,latitude,longitude"). Omit to return all fields.

#### Response Example

Expand full responseCopy

```
{
  "dot_number": "2247505",
  "legal_name": "SWIFT TRANSPORTATION CO OF ARIZONA LLC",
  "dba_name": "SWIFT TRANSPORTATION",
  "mc_number": "MC-728261",
  "operating_authority_status": "AUTHORIZED",
  "authority_types": ["COMMON", "CONTRACT"],
  "carrier_type": "CARRIER",
  "carrier_operation": "INTERSTATE",
  "phone": "+1 800-800-2200",
  "fax": "+1 602-269-9700",
  "cell_phone": "+1 602-555-0147",
  "timezone": "America/Phoenix",
  "date_added": "2004-03-15",
  "company_description": "One of North America's largest truckload carriers...",
  "physical_address": { "street": "2200 S 75TH AVE", "city": "PHOENIX", "state": "AZ", "zip": "85043" },
  "latitude": 33.4373,
  "longitude": -112.1430,
  "power_units": 18643,
  "drivers": 22891,
  // ... 200+ fields — expand to see full response
}
```

GET `/v1/carriers/mc/{mc_number}`

Look up a carrier by MC/MX docket number. Returns the full carrier profile (same fields as the DOT lookup). Supports the same ?fields= projection parameter.

#### Parameters

Name

Type

Required

Description

mc\_number

string

Yes 

The carrier's MC or MX docket number

fields

string

No 

Comma-separated list of fields to return. Omit to return all fields.

#### Response Example

Copy

```
{
  "dot_number": "2247505",
  "mc_number": "MC-728261",
  "legal_name": "SWIFT TRANSPORTATION CO OF ARIZONA LLC",
  "dba_name": "SWIFT TRANSPORTATION",
  "operating_authority_status": "AUTHORIZED",
  "authority_types": ["COMMON", "CONTRACT"],
  "carrier_type": "CARRIER",
  "carrier_operation": "INTERSTATE",
  "safety_rating": "SATISFACTORY",
  "phone": "+1 800-800-2200",
  "physical_address": {
    "street": "2200 S 75TH AVE",
    "city": "PHOENIX",
    "state": "AZ",
    "zip": "85043"
  },
  "power_units": 18643,
  "drivers": 22891
  // ... full carrier profile (200+ fields, same as /v1/carriers/{dot_number})
}
```

GET `/v1/carriers/search`

Match a company to a carrier by name, domain, state, and city. Returns ranked results with a confidence score. At minimum, company\_name is required.

#### Parameters

Name

Type

Required

Description

company\_name

string

Yes 

Company name to match against (fuzzy matching)

domain

string

No 

Company website domain (e.g. "swifttrans.com") — improves match accuracy

state

string

No 

State abbreviation (e.g. "TX", "CA")

city

string

No 

City name (e.g. "Phoenix", "Dallas")

page

number

No 

Page number (default: 1)

limit

number

No 

Results per page (default: 10, max: 50)

#### Response Example

Copy

```
{
  "total_results": 34,
  "results": [
    {
      "dot_number": "2447358",
      "legal_name": "SCHNEIDER IEP INC",
      "dba_name": null,
      "physical_city": "GREEN BAY",
      "physical_state": "WI",
      "confidence": 0.71
    },
    {
      "dot_number": "1156843",
      "legal_name": "SWIFT TRANSPORTATION SERVICES LLC",
      "dba_name": null,
      "physical_city": "PHOENIX",
      "physical_state": "AZ",
      "confidence": 0.82
    }
  ],
  "pagination": {
    "page": 1,
    "limit": 10,
    "total_results": 34,
    "total_pages": 4
  }
}
```

POST `/v1/carriers/query`

Advanced filtered search with include/exclude conditions, geo-radius search, sorting, and field projection. No company name required — filter by state, fleet size, cargo type, technology, authority status, revenue, and more.

#### Parameters

Name

Type

Required

Description

include

object

No 

Filter conditions to include (see filter options below)

exclude

object

No 

Filter conditions to exclude

fields

string\[\]

No 

Array of fields to return (e.g. \["dot\_number", "legal\_name", "power\_units"\])

limit

number

No 

Results per page (default: 25)

page

number

No 

Page number (default: 1)

sort\_by

string

No 

Sort field: power\_units, drivers, date\_added, safety\_rating, annual\_revenue, distance, etc.

sort\_order

string

No 

"asc" or "desc" (default: "desc")

#### Response Example

Copy

```
// Request body
{
  "include": {
    "state": "TX",
    "power_units": { "min": 50 },
    "cargo_type": ["Van", "Reefer"],
    "operating_authority_status": "Active",
    "location": { "latitude": 29.76, "longitude": -95.37, "radius_miles": 100 }
  },
  "exclude": {
    "safety_rating": "Unsatisfactory"
  },
  "fields": ["dot_number", "legal_name", "power_units", "state"],
  "sort_by": "power_units",
  "sort_order": "desc",
  "limit": 25,
  "page": 1
}

// Response
{
  "total_results": 847,
  "results": [
    {
      "dot_number": "2233855",
      "legal_name": "SCHNEIDER NATIONAL CARRIERS INC",
      "power_units": 9500,
      "distance_miles": 42.3
    }
  ],
  "pagination": {
    "page": 1,
    "limit": 25,
    "total_results": 847,
    "total_pages": 34
  }
}
```

GET `/v1/carriers/{dot_number}/safety`COMING SOON 

Get detailed safety data including BASIC scores, inspection history, and crash records.

GET `/v1/carriers/{dot_number}/authority`

Get the carrier's operating authority history. Returns all authority actions including grants, revocations, and reinstatements.

#### Parameters

Name

Type

Required

Description

dot\_number

string

Yes 

The carrier's USDOT number

limit

number

No 

Results per page (default: 50)

offset

number

No 

Number of results to skip (default: 0)

#### Response Example

Copy

```
{
  "dot_number": "2247505",
  "total_records": 5,
  "limit": 50,
  "offset": 0,
  "authority_history": [
    {
      "docket_number": "MC-728261",
      "sub_number": "1",
      "authority_type": "COMMON",
      "original_action": "GRANT",
      "original_served_date": "1990-06-15",
      "disposition_action": "GRANT",
      "disposition_decided_date": "1990-06-15",
      "disposition_served_date": "1990-06-20"
    }
  ]
}
```

GET `/v1/carriers/{dot_number}/insurance`

Retrieve insurance filings (BIPD, cargo, bond) for a carrier from the FMCSA insurance table. Includes policy numbers, coverage limits, and insurer details.

#### Parameters

Name

Type

Required

Description

dot\_number

string

Yes 

The carrier's USDOT number

limit

number

No 

Results per page (default: 50, max: 500)

page

number

No 

Page number (default: 1)

sort\_by

string

No 

Sort field: effective\_date, insurance\_type\_code, bipd\_maximum\_dollar\_limit, insurance\_company\_name (default: effective\_date)

sort\_order

string

No 

"asc" or "desc" (default: "desc")

insurance\_type

string

No 

Filter by insurance type code

insurer

string

No 

Partial match on insurance company name

min\_coverage

number

No 

Minimum BIPD dollar limit

date\_from

string

No 

Effective date start (ISO date)

date\_to

string

No 

Effective date end (ISO date)

#### Response Example

Copy

```
{
  "dot_number": "2233855",
  "total_policies": 8,
  "insurance": [
    {
      "id": 123456,
      "docket_number": "MC133655",
      "dot_number": "2233855",
      "mc_number": 133655,
      "insurance_type": {
        "code": "BIPD",
        "description": "Bodily Injury & Property Damage"
      },
      "bipd": {
        "class_code": "PRIMARY",
        "class_description": "Primary BIPD",
        "maximum_dollar_limit": 5000000,
        "underlying_dollar_limit": null
      },
      "policy_number": "PLC-2024-001234",
      "effective_date": "2024-01-15",
      "form": {
        "code": "BMC91X",
        "description": "Motor Carrier Surety Bond"
      },
      "insurance_company_name": "National Union Fire Ins Co Of Pittsburgh"
    }
  ],
  "pagination": {
    "page": 1,
    "limit": 50,
    "total_results": 8,
    "total_pages": 1
  }
}
```

GET `/v1/carriers/mc/{mc_number}/insurance`

Retrieve insurance filings by MC docket number. Same response shape and filters as the DOT-based insurance endpoint.

#### Parameters

Name

Type

Required

Description

mc\_number

string

Yes 

MC docket number (numeric)

limit

number

No 

Results per page (default: 50, max: 500)

page

number

No 

Page number (default: 1)

sort\_by

string

No 

Sort field: effective\_date, insurance\_type\_code, bipd\_maximum\_dollar\_limit, insurance\_company\_name (default: effective\_date)

sort\_order

string

No 

"asc" or "desc" (default: "desc")

insurance\_type

string

No 

Filter by insurance type code

insurer

string

No 

Partial match on insurance company name

min\_coverage

number

No 

Minimum BIPD dollar limit

#### Response Example

Copy

```
{
  "mc_number": 133655,
  "total_policies": 8,
  "insurance": [
    {
      "id": 123456,
      "docket_number": "MC133655",
      "dot_number": "2233855",
      "mc_number": 133655,
      "insurance_type": {
        "code": "BIPD",
        "description": "Bodily Injury & Property Damage"
      },
      "bipd": {
        "class_code": "PRIMARY",
        "class_description": "Primary BIPD",
        "maximum_dollar_limit": 5000000
      },
      "policy_number": "PLC-2024-001234",
      "effective_date": "2024-01-15",
      "form": {
        "code": "BMC91X",
        "description": "Motor Carrier Surety Bond"
      },
      "insurance_company_name": "National Union Fire Ins Co Of Pittsburgh"
    }
  ],
  "pagination": {
    "page": 1,
    "limit": 50,
    "total_results": 8,
    "total_pages": 1
  }
}
```

GET `/v1/carriers/{dot_number}/timeline`

Retrieve a merged chronological feed of carrier change events and authority history. Combines field-level changes from monthly FMCSA census diffs (contact, address, fleet, operations, authority, people) with authority history records.

#### Parameters

Name

Type

Required

Description

dot\_number

string

Yes 

The carrier's USDOT number

limit

number

No 

Max results (default: 50, max: 200)

offset

number

No 

Pagination offset (default: 0)

category

string

No 

Comma-separated categories: contact, address, fleet, operations, authority, people

date\_from

string

No 

Start date (ISO date)

date\_to

string

No 

End date (ISO date)

#### Response Example

Copy

```
{
  "dot_number": "2233855",
  "total": 127,
  "category_counts": {
    "fleet": 25,
    "authority": 12,
    "operations": 45,
    "contact": 18,
    "address": 8,
    "people": 19
  },
  "limit": 50,
  "offset": 0,
  "events": [
    {
      "id": 98765,
      "dot_number": "2233855",
      "detected_at": "2024-03-01",
      "category": "fleet",
      "event_type": "fleet_size_changed",
      "headline": "Power units changed from 9,200 to 9,500",
      "field_name": "power_units",
      "old_value": "9200",
      "new_value": "9500",
      "metadata": null,
      "source": "census_diff"
    },
    {
      "id": "auth_44321",
      "dot_number": "2233855",
      "detected_at": "2024-01-10",
      "category": "authority",
      "event_type": "authority_action",
      "headline": "[COMMON] GRANTED",
      "field_name": null,
      "old_value": null,
      "new_value": null,
      "metadata": {
        "docket_number": "MC-133655",
        "sub_number": "1",
        "authority_type": "COMMON",
        "original_action": "GRANTED",
        "disposition_action": "GRANTED",
        "disposition_decided_date": "2024-01-08",
        "disposition_served_date": "2024-01-10"
      },
      "source": "fmcsa_authority"
    }
  ]
}
```

GET `/v1/carriers/{dot_number}/trucks`

Get the carrier's registered truck (power unit) fleet. Includes VIN, make, model, engine specs, weight, and manufacturing details.

#### Parameters

Name

Type

Required

Description

dot\_number

string

Yes 

The carrier's USDOT number

limit

number

No 

Results per page (default: 50, max: 200)

offset

number

No 

Number of results to skip (default: 0)

#### Response Example

Copy

```
{
  "dot_number": "2247505",
  "total_trucks": 18643,
  "trucks": [
    {
      "vin": "1XKYD49X0MJ441234",
      "dot_number": "2247505",
      "cab_type": "CONVENTIONAL",
      "make": "KENWORTH",
      "model": "T680",
      "model_year": 2022,
      "engine_manufacturer": "PACCAR",
      "license_plate": "AZ-4821",
      "manufactured_by": "KENWORTH TRUCK CO",
      "manufactured_in": "UNITED STATES",
      "gross_weight": 80000,
      "body_type": "TRUCK TRACTOR",
      "engine_displacement": "12.9L",
      "engine_type": "DIESEL",
      "engine_cylinders": 6,
      "engine_model": "MX-13",
      "brake_system_type": "AIR",
      "plant_city": "CHILLICOTHE",
      "plant_state": "OH"
    }
  ],
  "limit": 50,
  "offset": 0,
  "total_results": 18643
}
```

GET `/v1/carriers/{dot_number}/trailers`

Get the carrier's registered trailer fleet. Includes VIN, manufacturer, type, and reefer status.

#### Parameters

Name

Type

Required

Description

dot\_number

string

Yes 

The carrier's USDOT number

limit

number

No 

Results per page (default: 50, max: 200)

offset

number

No 

Number of results to skip (default: 0)

#### Response Example

Copy

```
{
  "dot_number": "2247505",
  "total_trailers": 62104,
  "trailers": [
    {
      "vin": "1JJV532D8ML920456",
      "dot_number": "2247505",
      "manufacturer": "WABASH",
      "model_year": 2021,
      "trailer_type": "VAN/ENCLOSED BOX",
      "reefer": false,
      "license_plate": "AZ-11204"
    }
  ],
  "limit": 50,
  "offset": 0,
  "total_results": 62104
}
```

GET `/v1/carriers/{dot_number}/inspections`

Get the carrier's roadside inspection history. Returns inspection metadata and out-of-service counts. Use /v1/inspections/{inspection\_id}/violations to get violation details for a specific inspection.

#### Parameters

Name

Type

Required

Description

dot\_number

string

Yes 

The carrier's USDOT number

limit

number

No 

Results per page (default: 50, max: 200)

offset

number

No 

Number of results to skip (default: 0)

#### Response Example

Copy

```
{
  "dot_number": "2247505",
  "total_inspections": 4521,
  "inspections": [
    {
      "inspection_id": "AZ2024061512345",
      "report_number": "AZ2024061512345",
      "date": "2024-06-15",
      "state": "AZ",
      "level": 1,
      "start_time": "08:30",
      "end_time": "09:45",
      "location": "I-10 MM 142",
      "facility": "ROADSIDE",
      "carrier_name": "SWIFT TRANSPORTATION CO OF ARIZONA LLC",
      "shipper_name": "ACME CORP",
      "gross_vehicle_weight": 72000,
      "violations_total": 2,
      "driver_violations": 1,
      "vehicle_violations": 1,
      "hazmat_violations": 0,
      "oos_total": 0,
      "oos_driver": false,
      "oos_vehicle": false,
      "oos_hazmat": false,
      "traffic_enforcement": false,
      "size_weight_enforcement": false
    }
  ],
  "limit": 50,
  "offset": 0,
  "total_results": 4521
}
```

GET `/v1/carriers/{dot_number}/mc-sales`

Get any authority-for-sale listings (Facebook groups, Telegram channels, BizBuySell, etc.) that have been linked to this carrier's DOT number. Returns all detected occurrences with seller info, asking prices, post URLs, and matching reasoning. Returns \`found: false\` with \`mc\_sale: null\` when no listings have been linked to this carrier.

#### Parameters

Name

Type

Required

Description

dot\_number

integer

Yes 

The carrier's USDOT number

#### Response Example

Copy

```
{
  "dot_number": 2567323,
  "found": true,
  "mc_sale": {
    "mc_numbers": ["896740"],
    "carrier": {
      "legal_name": "DRZ TRANSPORT LLC",
      "dba_name": null,
      "state": "MN",
      "city": null,
      "phone": null,
      "email": null,
      "officers": []
    },
    "summary": {
      "occurrence_count": 1,
      "avg_confidence": 0.75,
      "max_confidence": 0.75
    },
    "listings": [
      {
        "seller_name": "JJ Junior (Mohamed Yusuf)",
        "phone": null,
        "email": null,
        "asking_price": null,
        "authority_age": "10 years",
        "post_url": "https://www.facebook.com/groups/.../permalink/...",
        "source_file": null,
        "confidence": 0.75,
        "reasoning": "Seller \"JJ Junior\" Facebook profile shows Minneapolis, MN..."
      }
    ],
    "first_seen": "2026-05-25T20:59:29.761414+00:00",
    "last_seen": "2026-05-25T20:59:29.733220+00:00"
  }
}

// 200 OK — no match
{ "dot_number": 999999999, "found": false, "mc_sale": null }

// Field notes
// - mc_sale.listings[] is a per-occurrence array. Each item represents one
//   detected sales post; the parallel fields (seller_name, phone, confidence,
//   reasoning, ...) come from a single observation.
// - summary.max_confidence and summary.avg_confidence are 0-1 floats from the
//   matching pipeline; treat low scores (<0.4) as weak/uncertain matches.
// - first_seen / last_seen are ISO-8601 timestamps showing when this carrier
//   first/last appeared in the sales-monitoring pipeline.
```

GET `/v1/carriers/{dot_number}/equipment-for-sale`

Cross-references the VINs this carrier has been inspected with against a marketplace dataset of trucks and trailers currently (or recently) listed for sale. Returns one row per matching VIN, sorted by most recent inspection date. Each row's \`equipment\_type\` field ("truck" or "trailer") determines which extra fields are populated. Empty results are common — most carriers' equipment is never listed publicly.

#### Parameters

Name

Type

Required

Description

dot\_number

string

Yes 

The carrier's USDOT number

limit

number

No 

Results per page (default: 25, max: 200)

page

number

No 

Page number, 1-based (default: 1)

#### Response Example

Copy

```
{
  "dot_number": "3701071",
  "total_listings": 12,
  "equipment": [
    {
      "equipment_type": "truck",
      "vin": "3AKJHHDR3RSUV5213",
      "last_seen_in_inspection": "2026-05-12",
      "inspection_count": 2,
      "listing_title": "2024 FREIGHTLINER CASCADIA 126",
      "manufacturer": "FREIGHTLINER",
      "model": "CASCADIA 126",
      "model_year": 2024,
      "category": null,
      "sub_category": null,
      "color": null,
      "price": 128900,
      "mileage": 249855,
      "fuel_type": null,
      "engine": {
        "manufacturer": "DETROIT",
        "model": null,
        "type": null,
        "displacement": null,
        "horsepower": "505 HP",
        "brake": null
      },
      "transmission": {
        "raw": null,
        "type": "Detroit DT12",
        "manufacturer": "DETROIT",
        "speeds": "12 Spd"
      },
      "cab": "SLEEPERCAB",
      "sleeper": { "type": null, "size": null },
      "cab_style": null,
      "drive": null,
      "suspension": "Air Ride",
      "axle_configuration": null,
      "wheelbase": null,
      "gvwr": null,
      "apu": null,
      "stock_number": null,
      "source": null,
      "description": "VEHICLE HIGHLIGHTS\nStock #: SUV5213..."
    }
  ],
  "pagination": {
    "page": 1,
    "limit": 25,
    "total_results": 12,
    "total_pages": 1
  }
}

// Equipment shape — common fields (both types):
//   equipment_type ("truck" | "trailer") — discriminator
//   vin — normalized uppercase
//   last_seen_in_inspection — most recent FMCSA inspection where this VIN
//     appeared under this DOT
//   inspection_count — how many distinct inspections that VIN appeared in
//     for this DOT
//   listing_title, manufacturer, model, model_year, price (USD),
//   category, description, stock_number
//
// equipment_type: "trailer" extra fields:
//   trailer_type, length, condition, retail_price, reefer,
//   reefer_manufacturer, reefer_model, dealer, dealer_location,
//   location: { city, state, postal_code, country },
//   listing_url, image_count, listing_updated
//
// equipment_type: "truck" extra fields:
//   sub_category, color, mileage (numeric), fuel_type,
//   engine: { manufacturer, model, type, displacement, horsepower, brake },
//   transmission: { raw, type, manufacturer, speeds },
//   cab (e.g. DAYCAB/SLEEPERCAB), sleeper: { type, size },
//   cab_style, drive, suspension, axle_configuration, wheelbase, gvwr,
//   apu, source
//
// Matching is VIN-based: a result means the same VIN appears in both the
// carrier's inspection-unit history and a listing record. inspection_count
// and last_seen_in_inspection help judge how strongly the VIN is tied to
// that carrier (e.g. a single 5-year-old inspection vs. 12 inspections
// over the past year). Garbage placeholder VINs (all-zeros, repeated chars,
// UNKNOWN/N/A) are filtered out before matching.
```

GET `/v1/inspections/vin/{vin}`

Look up the inspection history for a Vehicle Identification Number (VIN). Returns the unique DOT numbers the VIN has been associated with (with the last date seen on each), plus the unique locations (FIPS-coded counties enriched with county name, state abbreviation, latitude, and longitude) where the VIN has been inspected. Designed for verification workflows — confirming which carriers a tractor/trailer has run for and where it's been operating. Capped at the 5,000 most-recent inspections; when truncated, aggregations are computed over the returned sample. Successful responses are edge-cached for 24h; 404s for 1h.

#### Parameters

Name

Type

Required

Description

vin

string

Yes 

Vehicle Identification Number (case-insensitive — normalized to uppercase server-side)

#### Response Example

Copy

```
{
  "vin": "1FUJGLDR8DSBJ8237",
  "inspection_count": 47,
  "sample_size": 47,
  "truncated": false,
  "dot_numbers": [
    {
      "dot_number": "2233855",
      "last_seen": "2025-09-12",
      "inspection_count": 31
    },
    {
      "dot_number": "1287194",
      "last_seen": "2023-04-08",
      "inspection_count": 16
    }
  ],
  "locations": [
    {
      "fips": "48201",
      "state_fips": "48",
      "county_fips": "201",
      "county_name": "Harris County",
      "state_abbrev": "TX",
      "latitude": 29.857908,
      "longitude": -95.392479,
      "last_seen": "2025-09-12",
      "inspection_count": 9
    },
    {
      "fips": "06037",
      "state_fips": "06",
      "county_fips": "037",
      "county_name": "Los Angeles County",
      "state_abbrev": "CA",
      "latitude": 34.196869,
      "longitude": -118.261862,
      "last_seen": "2025-07-22",
      "inspection_count": 5
    }
  ]
}
```

GET / POST `/v1/vins`

Look up one or more VINs. For each VIN, returns its FMCSA inspection-unit history (where the equipment has been), its most recent sighting, every DOT it has been associated with, and whether it has ever been listed for sale (as a truck or trailer). Accepts a single VIN, a comma-separated list, or a JSON array (POST). VINs are uppercased, trimmed, and de-duplicated server-side; matching is case-insensitive. Max 100 VINs per request. Results preserve input order and include misses (found: false), so callers can tell which VINs had no data.

#### Parameters

Name

Type

Required

Description

vin

string

No 

A single VIN to look up — GET query form (e.g. ?vin=3AKJHHDR3RSUV5213). Case-insensitive.

vins

string | string\[\]

No 

Multiple VINs. GET: comma-separated query string (?vins=VIN1,VIN2,VIN3). POST: JSON array in the request body ({ "vins": \[...\] }). Max 100 VINs per request.

#### Request Examples

Copy

```
# Single VIN (GET)
curl "https://api.runalphaloops.com/v1/vins?vin=3AKJHHDR3RSUV5213" \
  -H "Authorization: Bearer YOUR_API_KEY"

# Comma-separated list (GET)
curl "https://api.runalphaloops.com/v1/vins?vins=3AKJHHDR3RSUV5213,1XKYDP9X3KJ239110" \
  -H "Authorization: Bearer YOUR_API_KEY"

# Batch (POST)
curl -X POST "https://api.runalphaloops.com/v1/vins" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"vins": ["3AKJHHDR3RSUV5213", "1XKYDP9X3KJ239110"]}'
```

#### Response Example

Copy

```
{
  "requested": 2,
  "results": [
    {
      "vin": "3AKJHHDR3RSUV5213",
      "found": true,
      "inspection_count": 2,
      "most_recent": {
        "date": "2026-05-12",
        "time": "0740",
        "location": "I-10 23 WB",
        "state": "CA",
        "dot_number": "3701071",
        "inspection_id": 87942748
      },
      "dots_associated": ["3701071"],
      "inspections": [
        {
          "inspection_id": 87942748,
          "insp_unit_number": 2,
          "unit_type": "TRAILER",
          "make": "FREIGHTLINER",
          "license": "DM1882",
          "license_state": "CA",
          "company": "LAND OF LIGHT TRANSPORT LLC",
          "date": "2026-05-12",
          "start_time": "0740",
          "end_time": "0810",
          "location": "I-10 23 WB",
          "state": "CA",
          "dot_number": "3701071"
        }
      ],
      "for_sale": {
        "listed": true,
        "as_truck": {
          "listing_title": "2024 FREIGHTLINER CASCADIA 126",
          "manufacturer": "FREIGHTLINER",
          "model": "CASCADIA 126",
          "model_year": 2024,
          "price": 128900,
          "mileage": 249855,
          "engine": { "manufacturer": "DETROIT", "model": null, "type": null, "displacement": null, "horsepower": "505 HP", "brake": null },
          "transmission": { "raw": null, "type": "Detroit DT12", "manufacturer": "DETROIT", "speeds": "12 Spd" },
          "cab": "SLEEPERCAB",
          "sleeper": { "type": null, "size": null },
          "suspension": "Air Ride",
          "description": "..."
        },
        "as_trailer": null
      }
    },
    {
      "vin": "1XKYDP9X3KJ239110",
      "found": false,
      "inspection_count": 0,
      "most_recent": null,
      "dots_associated": [],
      "inspections": [],
      "for_sale": { "listed": false, "as_truck": null, "as_trailer": null }
    }
  ]
}

// Top-level: requested = unique VIN count after normalization. results
//   preserves input order — one entry per VIN, including misses.
// most_recent is the most recent sighting ({ date, time, location, state,
//   dot_number, inspection_id }) or null if the VIN was never inspected.
// dots_associated with more than one DOT is a strong signal the equipment
//   changed hands or was re-registered between carriers.
// A VIN can be found: false (no inspections) but still have
//   for_sale.listed: true, or vice-versa — the two data sources are independent.
// for_sale.as_truck / as_trailer match the truck/trailer object shapes from
//   GET /v1/carriers/{dot_number}/equipment-for-sale.
```

GET `/v1/inspections/{inspection_id}/violations`

Retrieve all violations from a specific roadside inspection. Use the inspection report number returned from the Inspections endpoint to drill into violation details.

#### Parameters

Name

Type

Required

Description

inspection\_id

string

Yes 

The inspection report number

page

number

No 

Page number (default: 1)

limit

number

No 

Results per page (default: 25, max: 100)

#### Response Example

Copy

```
{
  "inspection_id": "TX2400012345",
  "total_violations": 3,
  "violations": [
    {
      "violation_code": "393.100",
      "description": "ADB - No or Defective ABS on Trailer",
      "oos": true,
      "unit_type": "TRAILER",
      "basic_category": "Vehicle Maintenance"
    }
  ],
  "pagination": {
    "page": 1,
    "limit": 25,
    "total_results": 3,
    "total_pages": 1
  }
}
```

GET `/v1/carriers/{dot_number}/crashes`

Get the carrier's reported crash history. Includes crash details, severity, and contributing factors.

#### Parameters

Name

Type

Required

Description

dot\_number

string

Yes 

The carrier's USDOT number

start\_date

string

No 

Filter from date (ISO 8601, e.g. "2024-01-01")

end\_date

string

No 

Filter to date (ISO 8601, e.g. "2024-12-31")

severity

string

No 

Filter by severity: "FATAL", "INJURY", "TOW", "PROPERTY\_DAMAGE"

page

number

No 

Page number (default: 1)

limit

number

No 

Results per page (default: 25, max: 100)

#### Response Example

Copy

```
{
  "dot_number": "2247505",
  "total_crashes": 89,
  "crashes": [
    {
      "crash_id": "TX20240322-0041",
      "report_number": "AZ20240322-0041",
      "date": "2024-03-22",
      "state": "TX",
      "city": "DALLAS",
      "location": "I-35 SB MM 428",
      "fatalities": 0,
      "injuries": 1,
      "tow_away": true,
      "hazmat_released": false,
      "severity": "INJURY",
      "vehicle_configuration": "TRUCK TRACTOR/SEMI-TRAILER",
      "cargo_body_type": "VAN/ENCLOSED BOX",
      "road_surface_condition": "DRY",
      "trafficway": "DIVIDED HIGHWAY",
      "weather_condition": "CLEAR",
      "light_condition": "DAYLIGHT",
      "vehicles_in_accident": 2,
      "truck_or_bus": "TRUCK",
      "gvw_rating": "26,001 LBS. OR MORE",
      "federal_recordable": true
    }
  ],
  "pagination": {
    "page": 1,
    "limit": 25,
    "total_results": 89,
    "total_pages": 4
  }
}
```

GET `/v1/carriers/{dot_number}/news`

Get recent news articles and press mentions related to the carrier.

#### Parameters

Name

Type

Required

Description

dot\_number

string

Yes 

The carrier's USDOT number

start\_date

string

No 

Filter from date (ISO 8601, e.g. "2024-01-01")

end\_date

string

No 

Filter to date (ISO 8601, e.g. "2024-12-31")

page

number

No 

Page number (default: 1)

limit

number

No 

Results per page (default: 25, max: 100)

#### Response Example

Copy

```
{
  "dot_number": "2247505",
  "total_results": 3,
  "articles": [
    {
      "id": "381500d33fe54ca0b62b69e33b865f68",
      "title": "Insurers Judged By The Trucking \"Company\" They Keep",
      "description": "The recent fatal crashes in Texas and Florida highlight the vulnerability of insurance companies in trucking, highlighting inconsistencies and underwriting issues in the industry.",
      "url": "https://finance.yahoo.com/news/insurers-judged-trucking-company-keep-111253688.html",
      "source": "finance.yahoo.com",
      "date": "2026-02-22T11:12:53+00:00",
      "type": "Accidents & Disasters",
      "sentiment": "negative",
      "image_url": "https://s.yimg.com/ny/api/res/1.2/wMWUugFK7QqYSEXxs8QrDQ--/YXBwaWQ9aGlnaGxhbmRlcjt3PTEyMDA7aD04MDA7Y2Y9d2VicA--/https://media.zenfs.com/en/freightwaves_373/b9fd29b5cc823ae09f9fd12f0cf2579f",
      "categories": [],
      "topics": [],
      "people": [],
      "companies": []
    },
    {
      "id": "0c51db4f048f4874a8af42da909ca2fb",
      "title": "The Catastrophic State of Trucking and Highway Safety",
      "description": "Yahoo's AI generates key points for safety, highlighting widespread failures in trucking and highway safety, with individuals like Harjinder Singh killing multiple people.",
      "url": "https://www.yahoo.com/news/articles/catastrophic-state-trucking-highway-safety-132927796.html",
      "source": "yahoo.com",
      "date": "2026-02-11T13:29:27+00:00",
      "type": "Accidents & Disasters",
      "sentiment": "negative",
      "image_url": "https://s.yimg.com/ny/api/res/1.2/Zk4JxiUGmyzXoXv9h4Zxgg--/YXBwaWQ9aGlnaGxhbmRlcjt3PTEyMDA7aD02NzU7Y2Y9d2VicA--/https://media.zenfs.com/en/freightwaves_373/205c14e7c6be280421261ab640e2acbc",
      "categories": ["Tech"],
      "topics": [],
      "people": [],
      "companies": []
    },
    {
      "id": "6d3b7429157c4e3db038913179cb0c26",
      "title": "Blind Spots: A Nationwide Pattern of Loopholes, Lapses and Lost Lives",
      "description": "The Dill family faces daily challenges due to a severe crash involving a semi-truck, resulting in multiple injuries, and inconsistent documentation.",
      "url": "https://www.wtsp.com/article/news/investigations/10-investigates/trucking-industry-investigation-blind-spots/67-a07664b7-235d-4d1f-aef0-6f44663671f2",
      "source": "wtsp.com",
      "date": "2026-02-02T00:00:00",
      "type": "Death & Tragedy",
      "sentiment": "negative",
      "image_url": "https://media.wtsp.com/assets/WTSP/images/b71d9cea-3867-4cab-ba79-b7a072a63558/20260115T204722/b71d9cea-3867-4cab-ba79-b7a072a63558_1140x641.jpg",
      "categories": [],
      "topics": [],
      "people": [],
      "companies": []
    }
  ]
}
```

GET `/v1/carriers/{dot_number}/connections`

Retrieve a carrier's corporate connections graph — shared officers, addresses, and related entities.

#### Parameters

Name

Type

Required

Description

dot\_number

string

Yes 

The carrier's USDOT number

limit

number

No 

Max results (default: 50, max: 200)

#### Response Example

Copy

```
{
  "dot_number": "2233855",
  "total_nodes": 15,
  "total_edges": 22,
  "nodes": [
    {
      "id": "2233855",
      "type": "carrier",
      "label": "SCHNEIDER NATIONAL CARRIERS INC"
    },
    {
      "id": "1098765",
      "type": "carrier",
      "label": "SCHNEIDER LOGISTICS INC"
    }
  ],
  "edges": [
    {
      "source": "2233855",
      "target": "1098765",
      "relationship": "shared_officer"
    }
  ]
}
```

GET `/v1/carriers/{dot_number}/risk-signals`

Aggregated carrier risk assessment in a single call. Returns an AI-generated risk score (0-10) and level, plus six signal categories — authority-for-sale listings, equipment-for-sale marketplace matches, financial-distress indicators, fraud/chameleon patterns, historical authority/insurance/change-event patterns, and recent news sentiment. Each category carries a derived \`level\` of "high", "medium", "clear", or "unknown" so you can triage without re-implementing the scoring logic. The risk summary is cached (regenerated when the underlying signals change); pass force\_refresh=true to force a fresh generation.

#### Parameters

Name

Type

Required

Description

dot\_number

string

Yes 

The carrier's USDOT number

force\_refresh

boolean

No 

Set to "true" to bypass the cached risk summary and regenerate it from current signals (slower). Default: false.

include\_equipment

boolean

No 

Set to "false" to skip the equipment-marketplace VIN lookup for a faster response. When false, equipment match details are omitted (the match count still reflects the carrier). Default: true.

#### Response Example

Expand full responseCopy

```
{
  "dot_number": "2567323",
  "carrier_name": "DRZ TRANSPORT LLC",
  "location": { "city": "MINNEAPOLIS", "state": "MN" },
  "risk_score": 7.4,
  "risk_level": "HIGH",
  "summary": "DRZ Transport (DOT 2567323) shows an active authority-for-sale listing and a triggered sold-MC chameleon pattern...",
  "generated_at": "2026-06-10T18:24:05.118Z",
  "cached": true,
  "summary_available": true,
  "signals": {
    "authority_for_sale": { "level": "high", "subtitle": "1 occurrence · 75% confidence", "...": "..." },
    "equipment_for_sale": { "level": "medium", "subtitle": "1 VIN found on equipment marketplaces", "...": "..." },
    "financial_risk":     { "level": "clear",  "...": "..." },
    "fraud_signals":      { "level": "medium", "is_chameleon": true, "...": "..." },
    "historical_patterns":{ "level": "high",   "subtitle": "2 risk patterns triggered", "...": "..." },
    "recent_activity":    { "level": "clear",  "...": "..." }
  }
  // ... expand to see the full signal payload
}
```

GET `/v1/carriers/{dot_number}/similar`

Find carriers similar to the specified carrier based on fleet size, location, cargo type, and other attributes.

#### Parameters

Name

Type

Required

Description

dot\_number

string

Yes 

The carrier's USDOT number

limit

number

No 

Max results (default: 20, max: 100)

#### Response Example

Copy

```
{
  "dot_number": "2233855",
  "similar_carriers": [
    {
      "dot_number": "1123456",
      "legal_name": "HEARTLAND EXPRESS INC",
      "state": "IA",
      "power_units": 4200,
      "similarity_score": 0.91
    }
  ]
}
```

GET `/v1/carriers/{dot_number}/overview`

Get an AI-generated summary overview of a carrier including key highlights.

#### Parameters

Name

Type

Required

Description

dot\_number

string

Yes 

The carrier's USDOT number

#### Response Example

Copy

```
{
  "dot_number": "2233855",
  "overview": "Schneider National Carriers Inc is a large, well-established carrier operating out of Green Bay, WI...",
  "highlights": [
    "One of the largest for-hire carriers in North America",
    "Strong safety record with Satisfactory rating",
    "Diversified operations across truckload, intermodal, and logistics"
  ]
}
```

GET `/v1/contacts/search`

Find people at a given company. Returns professional profiles including name, title, seniority, social profiles, and industry. Use dot\_number or company\_name to search. Note: This endpoint may return HTTP 202 with a Retry-After header if contacts are still being fetched — retry after the specified delay.

#### Parameters

Name

Type

Required

Description

dot\_number

string

No 

The carrier's USDOT number

company\_name

string

No 

Company name to search (required if dot\_number not provided)

job\_title

string

No 

Filter by job title keyword (e.g. "safety", "operations")

job\_title\_levels

string

No 

Filter by seniority: "vp", "director", "manager", "c\_suite"

page

number

No 

Page number (default: 1)

limit

number

No 

Results per page (default: 25, max: 100)

#### Response Example

Copy

```
// 200 OK — contacts ready
{
  "dot_number": "90849",
  "total_contacts": 42,
  "contacts": [
    {
      "id": "PEKpu5zopJZKUJWTUMvYFA_0000",
      "full_name": "Christopher Cada",
      "first_name": "Christopher",
      "last_name": "Cada",
      "sex": "male",
      "job_title": "Vice President Operations & Strategic Accounts",
      "job_title_role": "fulfillment",
      "job_title_levels": ["vp"],
      "job_company_name": "KTL Inc",
      "job_company_website": "ktlinc.com",
      "job_company_size": "51-200",
      "job_company_industry": "transportation/trucking/railroad",
      "job_start_date": "2019-01",
      "industry": "transportation/trucking/railroad",
      "linkedin_url": "linkedin.com/in/christophercada",
      "facebook_url": "facebook.com/christopher.cada.7",
      "location_name": "west olive, michigan, united states",
      "location_region": "michigan",
      "location_country": "united states"
    }
  ],
  "pagination": {
    "page": 1,
    "limit": 25,
    "total_results": 42,
    "total_pages": 2
  }
}

// 202 Accepted — contacts still being fetched (Retry-After: 5)
{
  "status": "pending",
  "dot_number": "90849",
  "message": "Contacts are being fetched. Please retry in a few seconds.",
  "retry_after": 5
}
```

GET `/v1/contacts/{contact_id}/enrich`

Enrich a contact profile by ID. Returns verified emails, phone numbers, skills, full work history, education, and social profiles.

#### Parameters

Name

Type

Required

Description

contact\_id

string

Yes 

The contact ID returned from /v1/contacts/search

#### Response Example

Copy

```
{
  "id": "PEKpu5zopJZKUJWTUMvYFA_0000",
  "full_name": "Christopher Cada",
  "first_name": "Christopher",
  "last_name": "Cada",
  "sex": "male",
  "job_title": "Vice President Operations & Strategic Accounts",
  "job_title_role": "fulfillment",
  "job_title_levels": ["vp"],
  "job_company_name": "KTL Inc",
  "job_company_website": "ktlinc.com",
  "job_company_size": "51-200",
  "job_company_industry": "transportation/trucking/railroad",
  "work_email": "ccada@ktlinc.com",
  "personal_emails": ["christopher.cada@gmail.com"],
  "mobile_phone": null,
  "phone_numbers": ["+1 630-817-6841", "+1 301-360-0001"],
  "linkedin_url": "linkedin.com/in/christophercada",
  "facebook_url": "facebook.com/christopher.cada.7",
  "location_name": "west olive, michigan, united states",
  "location_locality": "west olive",
  "location_region": "michigan",
  "location_country": "united states",
  "location_geo": "42.91,-86.14",
  "skills": [
    "3pl", "account management", "logistics", "supply chain management",
    "transportation", "freight", "operations management", "tms"
  ],
  "experience": [
    {
      "title": "Vice President Operations & Strategic Accounts",
      "company": "KTL Inc",
      "start_date": "2019-01",
      "end_date": null,
      "is_primary": true
    },
    {
      "title": "Business Product Owner",
      "company": "BluJay Solutions",
      "start_date": "2018-03",
      "end_date": "2019-08",
      "is_primary": false
    }
  ],
  "education": [
    {
      "school": "Embry-Riddle Aeronautical University",
      "start_date": "2006-01",
      "end_date": "2014"
    }
  ],
  "profiles": [
    { "network": "linkedin", "url": "linkedin.com/in/christophercada" },
    { "network": "facebook", "url": "facebook.com/christopher.cada.7" }
  ],
  "credits": {
    "remaining": 49,
    "total": 50,
    "used": 1
  }
}
```

GET `/v1/intent`COMING SOON 

Build a list of carriers showing intent around specific topics. Returns carriers that are actively researching, clicking, and engaging with content related to your query — powered by click-level web activity data.

GET `/v1/carriers/{dot_number}/transactions`COMING SOON 

See what a carrier is spending money on. Returns anonymized, aggregated transaction data showing vendor categories, spend trends, and purchasing patterns.

GET `/v1/graph/{dot_number}`COMING SOON 

Explore the AlphaLoops network graph for a carrier. Discover relationships between carriers, brokers, shippers, vendors, and key personnel — including shared officers, insurance providers, technology vendors, and business partnerships.

## Error Codes

Code

Description

200

Success

202

Accepted — contacts are being fetched asynchronously, retry after delay

400

Bad Request — invalid parameters

401

Unauthorized — invalid or missing API key

402

Payment Required — enrichment credits exhausted

404

Not Found — carrier does not exist

405

Method Not Allowed — only GET is supported

429

Rate Limited — too many requests

500

Internal Server Error

502

Bad Gateway — upstream service (freight API or news provider) failed

## General Notes

### Error Response Format

All errors return a consistent JSON shape:

```
{
  "error": "Short error type",
  "message": "Human-readable description of what went wrong."
}
```

### CORS

All endpoints support CORS preflight (`OPTIONS → 204`) with `Access-Control-Allow-Origin: *`. Safe to call directly from browser-based applications.

### Enrichment Credits

The `/v1/contacts/{contact_id}/enrich` endpoint consumes 1 credit per new enrichment. Cached results are free. Credits remaining are returned in both the response body (`credits` object) and the `X-Enrichment-Credits-Remaining` header. When credits are exhausted, the endpoint returns HTTP 402.

### Pagination

Most endpoints use `page`/`limit` pagination. However, **trucks**, **trailers**, **inspections**, and **authority** use `offset`/`limit` instead. Check each endpoint's parameter table for the correct style.

### Field Projection

The `?fields=` parameter is only available on the carrier profile endpoints (`/v1/carriers/{dot_number}` and `/v1/carriers/mc/{mc_number}`). It is not supported on other endpoints.

## Need API Access?

Contact our team to get your API key and start building with FMCSA carrier data.

[Get API Access](https://runalphaloops.com/contact)

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### Product

-   [Platform](/product)
-   [Our Data](/our-data)
-   [FMCSA API](/fmcsa-api)
-   [MCP Server](/mcp)
-   [Integrations](/integrations)
-   [Pricing](/pricing)

### Company

-   [Contact](/contact)
-   [Support](/support)
-   [Research](https://research.runalphaloops.com/)

### Resources

-   [Carrier Watchlist](/watchlist)
-   [Carrier Technology](/technology)
-   [FMCSA Data Hub](/data)
-   [Carrier Flows](/data/carrier-flows)
-   [Carrier Directory](https://alphafreight.runalphaloops.com/carriers)
-   [Compare AlphaLoops](/vs)

### [Guides](/guides)

-   [How to Prospect With FMCSA Data](/guides/fmcsa-prospecting)
-   [What Is an MC Number Sale?](/guides/what-is-an-mc-number-sale-risks-red-flags-and-what-to-check)
-   [How to Spot a Chameleon Carrier](/guides/how-to-spot-a-chameleon-carrier)
-   [Carrier Vetting Checklist](/guides/carrier-vetting-checklist-how-to-verify-a-carrier-before-booking)
-   [Carrier Intelligence Buyer's Guide](/guides/how-to-evaluate-a-carrier-intelligence-platform-a-buyer-s-guide-for-freight-gtm-teams)

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