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mirrored listing x402 eip155:8453

MPG lookup for any US-market car since 1984: official test-cycle city, highway, and combin

MPG lookup for any US-market car since 1984: official test-cycle city, highway, and combined miles per gallon plus fuel type and CO2 per mile, by year/make/model or VIN. Multiple engine/transmission variants are returned with ids so you can query the exact one. Clean structured JSON.

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5000 (raw units)
price
1
calls / 30d
1
unique payers
2026-09-03
updated

Provider

x402.forgemesh.io · discovered, not yet claimed by its owner

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x850363a27F0aC6fEb9C7a3eC4C1d295262dF9432",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "maxTimeoutSeconds": 300
  }
]

Output schema

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "make": "Honda",
          "model": "Accord",
          "model_year": "2020"
        },
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      },
      "output": {
        "example": {
          "attribution": "US DOE/EPA fuel economy database (public domain)",
          "fuel_economy": {
            "annual_fuel_cost_usd": 1600,
            "city_mpg": 26,
            "co2_tailpipe_g_per_mi": 302,
            "combined_mpg": 29,
            "fuel_type": "Regular",
            "highway_mpg": 35
          },
          "matched_variant": {
            "description": "2020 Honda Accord — Man 6-spd 1.5L",
            "vehicle_id": 42069
          }
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "body": {
              "properties": {
                "make": {
                  "description": "e.g. Honda",
                  "type": "string"
                },
                "model": {
                  "description": "e.g. Accord",
                  "type": "string"
                },
                "model_year": {
                  "description": "4-digit year, 1984+",
                  "type": "string"
                },
                "vehicle_id": {
                  "description": "exact variant id from other_variants",
                  "type": "integer"
                },
                "vin": {
                  "description": "VIN — decoded automatically (alternative to make/model/model_year)",
                  "type": "string"
                }
              },
              "type": "object"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  },
  "info": {
    "required": false
  },
  "offer-receipt": {
    "info": {
      "offers": [
        {
          "acceptIndex": 0,
          "format": "eip712",
          "payload": {
            "amount": "5000",
            "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
            "network": "eip155:8453",
            "payTo": "0x850363a27F0aC6fEb9C7a3eC4C1d295262dF9432",
            "resourceUrl": "https://x402.forgemesh.io/car-mpg-lookup",
            "scheme": "exact",
            "validUntil": 1788443245,
            "version": 1
          },
          "signature": "0x9d1e0c271c89431dffa3629c7ce9fdc54dc19199cd74ccba938ea73251c49c21042ef57673dfc7a615a54b5e42aac7d33446a6495914887377dc5d91c21510311b"
        }
      ]
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "offers": {
          "items": {
            "properties": {
              "acceptIndex": {
                "type": "integer"
              },
              "format": {
                "type": "string"
              },
              "payload": {
                "properties": {
                  "amount": {
                    "type": "string"
                  },
                  "asset": {
                    "type": "string"
                  },
                  "network": {
                    "type": "string"
                  },
                  "payTo": {
                    "type": "string"
                  },
                  "resourceUrl": {
                    "type": "string"
                  },
                  "scheme": {
                    "type": "string"
                  },
                  "validUntil": {
                    "type": "integer"
                  },
                  "version": {
                    "type": "integer"
                  }
                },
                "required": [
                  "version",
                  "resourceUrl",
                  "scheme",
                  "network",
                  "asset",
                  "payTo",
                  "amount"
                ],
                "type": "object"
              },
              "signature": {
                "type": "string"
              }
            },
            "required": [
              "format",
              "signature"
            ],
            "type": "object"
          },
          "type": "array"
        }
      },
      "required": [
        "offers"
      ],
      "type": "object"
    }
  },
  "schema": {
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "properties": {
      "id": {
        "maxLength": 128,
        "minLength": 16,
        "pattern": "^[a-zA-Z0-9_-]+$",
        "type": "string"
      },
      "required": {
        "type": "boolean"
      }
    },
    "required": [
      "required"
    ],
    "type": "object"
  }
}

Use it

curl

curl "https://x402.forgemesh.io/car-mpg-lookup"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://x402.forgemesh.io/car-mpg-lookup");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://x402.forgemesh.io/car-mpg-lookup")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Machine-readable

Everything on this page is also available as clean JSON at /resources/14251.json, and this resource appears in /discovery/resources and /discovery/search.