Interest Rates API

Current auto loan interest rates and financing options based on vehicle and borrower profile

Get current interest rates for auto loans, leases, and other financing options. Retrieve personalized rates based on vehicle details, credit score, location, and loan terms.

Endpoint

GET https://api.auto.dev/apr/{vin}

Parameters

Path Parameters

Prop	Type	Default
`vin`	`string`	-

Query Parameters

Prop	Type	Default
`year`	`number`	-
`make`	`string`	-
`model`	`string`	-
`zip`	`string`	-
`creditScore`	`string`	-
`vehicleAge?`	`number`	-
`vehicleMileage?`	`string`	-

Example Request

curl -X GET "https://api.auto.dev/apr/1C4HJXEN5MW592818?year=2021&make=Jeep&model=Wrangler&zip=37129&creditScore=720&vehicleAge=3&vehicleMileage=36000" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json"

Response Structure

Prop	Type	Default
`vehicle?`	`object`	-
`vehicle.vin?`	`string`	-
`vehicle.year?`	`number`	-
`vehicle.make?`	`string`	-
`vehicle.model?`	`string`	-
`zip?`	`string`	-
`creditScore?`	`string`	-
`vehicleAge?`	`number`	-
`vehicleMileage?`	`string`	-
`apr?`	`object`	-
`apr.36?`	`number`	-
`apr.48?`	`number`	-
`apr.60?`	`number`	-
`apr.72?`	`number`	-
`apr.84?`	`number`	-

Example Response

{
  "vehicle": {
    "vin": "1C4HJXEN5MW592818",
    "year": 2021,
    "make": "Jeep",
    "model": "Wrangler"
  },
  "zip": "37129",
  "creditScore": "720",
  "vehicleAge": 3,
  "vehicleMileage": "36000",
  "apr": {
    "36": 7.644,
    "48": 7.644,
    "60": 7.524,
    "72": 7.663,
    "84": 8.263
  }
}

Error Responses

Invalid VIN

{
  "status": 400,
  "error": "VIN must be exactly 17 characters containing only letters and numbers (excluding I, O, Q)",
  "code": "INVALID_VIN_FORMAT",
  "path": "/rates/123Invalid",
  "requestId": "a1b2c3d4e5f6g7h8"
}

VIN Not Found

{
  "status": 404,
  "error": "No vehicle data found for the provided VIN",
  "code": "VIN_NOT_FOUND",
  "path": "/rates/WP0AF2A99KS165242",
  "requestId": "b2c3d4e5f6g7h8i9"
}

Plan Availability

Starter: ❌ Not available
Growth: ✅ Available
Scale: ✅ Available

See pricing for plan details and signup.

Interest Rates API

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