CARFAX Value Estimate (by VIN)

omnial/get-carfax-value

Given a VIN from an active CARFAX listing, returns CARFAX's own value assessment for that listing: the dealer's list price, CARFAX's estimated fair price (onePrice), a plain-language value badge (GREAT, GOOD, FAIR, or HIGH), the factors driving that valuation up or down (service history, accident history, ownership count, and similar), and a standard-assumptions monthly payment estimate for the listing.

activeper callv2

Price

Up to $0.0137 per call; you pay what the call used

You pay the price shown. If a call turns out to cost more than its quote, you pay the actual price, capped at twice the quote. No monthly minimum. Top-ups start at $5.00.

Use it

Your AI assistant does the work: it finds this tool, shows you the price first, runs it, and you are charged when the run finishes. There is nothing to set up for this tool in particular.

Connect once and your AI can find and run this tool, and any other it needs.

Install it Create an account

For developers: the calls your assistant makes

agent

// 1. search: find the tool
omnial_search({ query: "what you need" })

// 2. inspect: price and input schema
omnial_inspect({ tool: "omnial/get-carfax-value" })

// 3. learn: read the usage guide at runtime
omnial_learn({ tool: "omnial/get-carfax-value" })

// 4. run: price the exact call first, then run it
omnial_execute({ tool: "omnial/get-carfax-value", input: { /* see input_schema */ }, dry_run: true })
omnial_execute({ tool: "omnial/get-carfax-value", input: { /* ... */ } })

// 5. settle: the call is charged when it finishes, nothing to do

Not connected yet? Point your MCP client at https://mcp.eden-engine.com/mcp, then copy a config for your client.

Pricing

Every charge this tool can incur.

Charge	Price
Per call	$0.0137

Updated: Oct 27, 2026

Input and output schemas

Input schema

input_schema.json

{
  "type": "object",
  "required": [
    "vin"
  ],
  "properties": {
    "vin": {
      "type": "string",
      "description": "Vehicle Identification Number (VIN) of an active CARFAX listing. Obtain from search_used_car_listings results."
    }
  },
  "additionalProperties": false
}

Output schema

output_schema.json

{
  "type": "object",
  "properties": {
    "data": {
      "type": "object",
      "properties": {
        "badge": {
          "type": [
            "string",
            "null"
          ],
          "description": "CARFAX's plain-language value rating for the listing (e.g. 'GREAT'). The vendor's docs describe GOOD, FAIR, and HIGH as other possible values, and null when CARFAX has not assigned a badge."
        },
        "onePrice": {
          "type": "number",
          "description": "CARFAX's own estimated fair price for the listing, in USD."
        },
        "listPrice": {
          "type": "number",
          "description": "The dealer's list price for the listing, in USD."
        },
        "onePriceArrows": {
          "type": "array",
          "items": {
            "type": "object",
            "properties": {
              "icon": {
                "type": "string",
                "description": "A short internal name for this factor's icon."
              },
              "text": {
                "type": "string",
                "description": "Plain-language label for this factor (observed: 'Service History', 'Personal Vehicle', 'Multiple Owners', 'Minor Damage', 'No Accidents Reported', '1-Owner Vehicle')."
              },
              "arrow": {
                "type": "string",
                "description": "Direction of this factor's effect on price (observed: 'UP', 'DOWN')."
              },
              "order": {
                "type": "number",
                "description": "Display order, starting at 1."
              },
              "iconName": {
                "type": "string",
                "description": "A second, differently-formatted icon identifier for this factor."
              }
            },
            "additionalProperties": true
          },
          "description": "The factors behind the valuation, each pointing the price up or down (e.g. 4 entries); the count varies with the listing's history."
        },
        "monthlyPaymentEstimate": {
          "type": "object",
          "properties": {
            "price": {
              "type": "number",
              "description": "The vehicle's price in USD, used as the loan basis."
            },
            "loanAmount": {
              "type": "number",
              "description": "Price minus down payment, in USD."
            },
            "interestRate": {
              "type": "number",
              "description": "Assumed annual interest rate, as a percent."
            },
            "termInMonths": {
              "type": "number",
              "description": "Assumed loan term in months."
            },
            "monthlyPayment": {
              "type": "number",
              "description": "The estimated monthly payment, in USD."
            },
            "downPaymentAmount": {
              "type": "number",
              "description": "Assumed down payment, in USD."
            },
            "downPaymentPercent": {
              "type": "number",
              "description": "Assumed down payment, as a percent."
            }
          },
          "description": "A standard-assumptions monthly payment estimate for the listing.",
          "additionalProperties": true
        }
      },
      "description": "The valuation payload for the listing.",
      "additionalProperties": true
    },
    "status": {
      "type": "string",
      "description": "'success' on both real active-listing calls observed."
    }
  },
  "description": "The CARFAX Value result for an active listing. The vendor's own docs describe a badge of null when CARFAX has not rated a listing, so `badge` is typed to allow null.",
  "additionalProperties": true
}