ATC Portal API Documentation

API Endpoints

US States Supported

REST

API Architecture

JSON

Data Format

ATC Portal API v3.0

Streamline your vehicle registration and titling workflow with our comprehensive API. Built for dealerships, fleet managers, and automotive professionals who need reliable, state-compliant vehicle registration services.

🚀 Getting Started

1. Get Your API Token

Contact your ATC representative to obtain your API authentication token

2. Try Interactive API

Use our search-enabled interactive API explorer to test endpoints

3. Check Examples

Review code samples in JavaScript, Python, and C# to get started quickly

🚗 Vehicle Registration

Complete vehicle registration with all required state-specific information, supporting both individual and business customers across all 50 US states.

🔍 VIN Management

Register and decode VINs with detailed vehicle information retrieval, supporting all major vehicle types from motorcycles to commercial vehicles.

📊 Transaction Processing

Real-time transaction tracking with status updates, quote management, and comprehensive transaction history for all your registrations.

💰 Fee Calculations

Automatic DMV fee calculation with tax computations, state-specific rates, and detailed fee breakdowns for accurate pricing.

📦 Shipment Tracking

Track plates and documents with integrated carrier tracking, delivery notifications, and shipping address management.

📄 Document Management

Secure document upload and storage for titles, registrations, and supporting documentation with transaction linking.

API Endpoints Overview

Vehicle Registration

RegisterVehicle - Complete registration
RegisterVehicleAlternate - Alternative method
RegisterVIN - VIN registration only
RegisterVINAlternate - Alternative VIN method

Transaction Management

GetTransactionRecord - Single record
GetTransactionRecords - Multiple records
GetTransactionRecordsByStatus - Filter by status
SaveTransactionNotes - Add notes

Fees & Information

GetTaxableInfo - Tax calculations
GetAtcFees - ATC fee structure
GetCustomerFees - Customer-specific fees
GetFinalFees - Complete fee breakdown

Support Services

GetDealerSummary - Dealer information
GetCustomers - Customer management
GetShipmentInformation - Tracking
GetVinInfo - VIN details

Why Choose ATC Portal API?

State Compliance: Fully compliant with all 50 US state registration requirements
Real-time Processing: Instant DMV fee calculations and transaction updates
Comprehensive Coverage: Support for Purchase, Lease, and other transaction types
Flexible Integration: RESTful API design with comprehensive documentation
Secure & Reliable: Enterprise-grade security with 99.9% uptime
Expert Support: Dedicated API support team and comprehensive examples

API Endpoints (33 Total)

Vehicle Registration (4)

POST

/RegisterVehicle

POST

/RegisterVehicleAlt

Alternative registration method

POST

/RegisterVIN

POST

/RegisterVINAlt

Alternative VIN registration

Transaction Retrieval (9)

GET

/GetDealerSummary

Dealer summary info

GET

/GetCustomers

List dealer customers

GET

/GetTransactionRecord

Single transaction by quote

GET

/GetTransactionRecords

Multiple transactions with filters

GET

/GetTransactionRecordsByStatus

Filter by workflow status

GET

/GetTransactionRecordsByTransactionStatus

Filter by internal status

GET

/GetUpdatedQuoteNames

Quotes updated in date range

GET

/GetUpdatedTransactionRecordsByInterval

Recent updates by interval

GET

/GetTransactionStatusHistoryByQuoteName

Status change history

Tax & Fee Information (6)

POST

/GetTaxableInfo

Calculate taxes

GET

/GetQuoteDMVInfo

DMV info for quote

GET

/GetAtcFees

ATC fees (internal)

GET

/GetCustomerFees

Customer-facing fees

GET

/GetFinalFees

Final fee calculation

GET

/GetInvoiceDetailsByQuoteName

Detailed invoice

Needs Notice (4)

GET

/GetTransactionNeedsNoticeItems

Needs notice items

GET

/GetTransactionNeedsNoticeItemsAndComments

Items with comments

POST

/SaveDealerNeedsNoticeComment

Add comment to item

GET

/GetUnreadATCNeedsNoticeCommentsByInterval

Unread ATC comments

Customer Management (4)

GET

/GetCustomerContactsByCustomerId

List customer contacts

POST

/AddCustomerContact

Add new contact

POST

/ChangeCustomerContactRole

Change contact role

POST

/DeleteCustomerContact

Delete a contact

Reference & Utilities (6)

GET

/GetDMVTurnaroundInfo

DMV processing times

GET

/GetActiveQuotesLink

Portal link for quote

GET

/GetVinInfo

Decode VIN information

GET

/GetShipmentInformation

Shipment tracking

POST

/SaveTransactionRecordDocuments

Upload PDF documents

POST

/SaveTransactionNotes

Add transaction notes

Schema Reference

Complete reference tables showing all API fields, their types, requirements, and valid values.

Vehicle Information Fields

Field Name	Type	Required	Valid Values	Description
vin	string	Yes	17-character VIN	Vehicle Identification Number
state	string	Yes	AlabamaAlaskaArizonaArkansasCaliforniaColoradoConnecticutDelawareFloridaGeorgiaHawaiiIdahoIllinoisIndianaIowaKansasKentuckyLouisianaMaineMarylandMassachusettsMichiganMinnesotaMississippiMissouriMontanaNebraskaNevadaNew HampshireNew JerseyNew MexicoNew YorkNorth CarolinaNorth DakotaOhioOklahomaOregonPennsylvaniaRhode IslandSouth CarolinaSouth DakotaTennesseeTexasUtahVermontVirginiaWashingtonWest VirginiaWisconsinWyoming	US State for registration
county	string	Yes	County name	County within the state
city	string	Yes	City name	City for registration
zipcode	integer	Yes	5-digit ZIP code	Postal code
transactionType	string	Yes	PurchaseLease	Type of vehicle transaction
vehicleType	string	Yes	Passenger VehiclePick-up TruckMotorcycleTravel TrailerMotor HomeCab & ChassisDelivery VehicleSUV	Primary vehicle category
vehicleSubType	string	No	Semi-TrailersTravel TrailersUtilityHouseHomemadeCampingBoatHeavy DutyMedium DutyCab and ChassisFarm UseSchoolTourismNonprofitTransitRecreationalOHV/ATVSnowmobileMotorbikePersonal WatercraftUTV	Vehicle sub-category
modelYear	integer	Yes	4-digit year	Vehicle model year
model	string	Yes	Model name	Vehicle model
make	string	Yes	Manufacturer name	Vehicle manufacturer
bodyStyle	string	No	CAB & CHASSISCOUPECONVERTIBLEHATCHBACKMOTORCYCLEMOTORHOMESEDANSTATIONWAGONSPORT UTILITY VEHICLETRAILERTRUCKUTILITYVANWAGON	Vehicle body style
color	string	No	BLACKBROWNBLUEGREYSILVERREDGREENPURPLEPINKORANGEMAROONGOLDTANWHITEYELLOWBRONZE	Vehicle color
fuelType	string	No	GasElectricDieselHybrid	Fuel/power type
plateType	string	No	RegularCommercial	License plate type
titleStatus	string	No	MCOTitle	Title document status
vehiclePossessionType	string	No	DealershipResidence	Where vehicle is located

Driver Information Fields

Field Name	Type	Required	Valid Values	Description
driverCategory	string	Yes	IndividualBusiness	Type of driver/owner
firstName	string	Yes	Text	Driver's first name
lastName	string	Yes	Text	Driver's last name
state	string	Yes	Same as vehicle states above	Driver's state

Mailing & Contact Fields

Field Name	Type	Required	Valid Values	Description
mailingInstruction	string	No	DealerDriver	Where to send documents
state	string	No	Same as vehicle states above	Mailing address state

💡 Quick Tips

Fields marked Yes are required and must be provided
Enum fields have dropdown menus in the Interactive API tab
State fields all use the same 50 US state values
Use the exact spelling and capitalization shown for enum values

Field Values Reference

Complete reference of all accepted values for enumerated fields in the API.

Vehicle Information Fields

vehicleType

Passenger Vehicle Pick-up Truck Motorcycle Travel Trailer Motor Home Cab & Chassis Delivery Vehicle SUV

vehicleSubType

Semi-Trailers Travel Trailers Utility House Homemade Camping Boat Heavy Duty Medium Duty Cab and Chassis Farm Use School Tourism Nonprofit Transit Recreational OHV/ATV Snowmobile Motorbike Personal Watercraft UTV

bodyStyle

CAB & CHASSIS COUPE CONVERTIBLE HATCHBACK MOTORCYCLE MOTORHOME SEDAN STATIONWAGON SPORT UTILITY VEHICLE TRAILER TRUCK UTILITY VAN WAGON

fuelType

Gas Electric Diesel Hybrid

color

BLACK BROWN BLUE GREY SILVER RED GREEN PURPLE PINK ORANGE MAROON GOLD TAN WHITE YELLOW BRONZE

Transaction & Registration Fields

transactionType

Purchase Lease

plateType

Regular Commercial

titleStatus

MCO Title

leaseTaxesType

Paid In-Lease Paid Upfront

vehiclePossessionType

Dealership Residence

Driver & Contact Fields

driverCategory

Individual Business

mailingInstruction

Dealer Driver

plateShipmentTo

Dealer Customer

Trade-In Fields

tradeInVehicleType

Passenger Vehicle Pick-up Truck Motorcycle Travel Trailer Motor Home Cab & Chassis Delivery Vehicle SUV Truck Bus

tradeInSubVehicleType

Semi-Trailers Travel Trailers Utility House Homemade Camping Boat Heavy Duty Medium Duty Cab and Chassis Farm Use

State Values

All state fields accept the following US states:

Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming

Applies to fields: state, titleState, tradeinState, lienHolderState, and all address state fields

🔍 Quick Endpoint Search

Authentication

The ATC Portal API uses token-based authentication. Include your API token in the request header for all API calls.

Request Header

apiToken: YOUR_API_TOKEN_HERE

Example Request

curl -X POST https://api.autotitling.com/api/APIStack/v3/RegisterVehicle \
  -H "Content-Type: application/json" \
  -H "apiToken: YOUR_API_TOKEN_HERE" \
  -d '{
    "customerInfo": {
      "businessName": "Example Dealer",
      "customerID": 12345
    },
    "vehicleInfo": {
      "vin": "1HGCM82633A123456",
      "state": "California",
      ...
    }
  }'

Security Best Practices

Keep your API token secure and never expose it in client-side code
Use HTTPS for all API requests
Rotate your API tokens regularly
Implement proper error handling for authentication failures
Monitor API usage for unusual patterns

Code Examples

JavaScript/Node.js

const axios = require('axios');

const registerVehicle = async () => {
  try {
    const response = await axios.post(
      'https://api.autotitling.com/api/APIStack/v3/RegisterVehicle',
      {
        customerInfo: {
          businessName: "Example Dealer",
          customerID: 12345,
          dealerId: null
        },
        vehicleInfo: {
          vin: "1HGCM82633A123456",
          state: "California",
          county: "Los Angeles",
          city: "Los Angeles",
          zipcode: 90001,
          transactionType: "Purchase",
          vehicleType: "Passenger Car",
          modelYear: 2023,
          model: "Accord",
          make: "Honda"
          // ... additional fields
        },
        driverInfo: {
          driverCategory: "Individual",
          drivers: [{
            firstName: "John",
            lastName: "Doe",
            address1: "123 Main St",
            city: "Los Angeles",
            state: "California",
            zipCode: "90001",
            isPrimary: true
          }]
        }
      },
      {
        headers: {
          'Content-Type': 'application/json',
          'apiToken': 'YOUR_API_TOKEN_HERE'
        }
      }
    );
    
    console.log('Registration successful:', response.data);
  } catch (error) {
    console.error('Registration failed:', error.response.data);
  }
};

registerVehicle();

Python

import requests
import json

def register_vehicle():
    url = "https://api.autotitling.com/api/APIStack/v3/RegisterVehicle"
    
    headers = {
        "Content-Type": "application/json",
        "apiToken": "YOUR_API_TOKEN_HERE"
    }
    
    payload = {
        "customerInfo": {
            "businessName": "Example Dealer",
            "customerID": 12345,
            "dealerId": None
        },
        "vehicleInfo": {
            "vin": "1HGCM82633A123456",
            "state": "California",
            "county": "Los Angeles",
            "city": "Los Angeles",
            "zipcode": 90001,
            "transactionType": "Purchase",
            "vehicleType": "Passenger Car",
            "modelYear": 2023,
            "model": "Accord",
            "make": "Honda"
            # ... additional fields
        },
        "driverInfo": {
            "driverCategory": "Individual",
            "drivers": [{
                "firstName": "John",
                "lastName": "Doe",
                "address1": "123 Main St",
                "city": "Los Angeles",
                "state": "California",
                "zipCode": "90001",
                "isPrimary": True
            }]
        }
    }
    
    try:
        response = requests.post(url, headers=headers, json=payload)
        response.raise_for_status()
        print("Registration successful:", response.json())
    except requests.exceptions.RequestException as e:
        print("Registration failed:", e)

register_vehicle()

C#/.NET

using System;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
using Newtonsoft.Json;

public class ATCPortalClient
{
    private readonly HttpClient _httpClient;
    private const string BaseUrl = "https://api.autotitling.com/api/APIStack/v3";
    
    public ATCPortalClient(string apiToken)
    {
        _httpClient = new HttpClient();
        _httpClient.DefaultRequestHeaders.Add("apiToken", apiToken);
    }
    
    public async Task RegisterVehicleAsync()
    {
        var payload = new
        {
            customerInfo = new
            {
                businessName = "Example Dealer",
                customerID = 12345,
                dealerId = (int?)null
            },
            vehicleInfo = new
            {
                vin = "1HGCM82633A123456",
                state = "California",
                county = "Los Angeles",
                city = "Los Angeles",
                zipcode = 90001,
                transactionType = "Purchase",
                vehicleType = "Passenger Car",
                modelYear = 2023,
                model = "Accord",
                make = "Honda"
                // ... additional fields
            },
            driverInfo = new
            {
                driverCategory = "Individual",
                drivers = new[]
                {
                    new
                    {
                        firstName = "John",
                        lastName = "Doe",
                        address1 = "123 Main St",
                        city = "Los Angeles",
                        state = "California",
                        zipCode = "90001",
                        isPrimary = true
                    }
                }
            }
        };
        
        var json = JsonConvert.SerializeObject(payload);
        var content = new StringContent(json, Encoding.UTF8, "application/json");
        
        var response = await _httpClient.PostAsync($"{BaseUrl}/RegisterVehicle", content);
        return await response.Content.ReadAsStringAsync();
    }
}