Gas Price Change by State (Day/Week/Month/Year) (omnial/get-price-change-by-state), Eden Engine

Contract

input_schema.json

{
  "type": "object",
  "required": [
    "state_code"
  ],
  "properties": {
    "state_code": {
      "type": "string",
      "description": "Two-letter US state code (e.g. TX, CA, NY, FL). All 50 states and DC are supported."
    }
  },
  "additionalProperties": false
}

output_schema.json

{
  "type": "object",
  "properties": {
    "data": {
      "type": "object",
      "properties": {
        "state_code": {
          "type": "string",
          "description": "The two-letter state code echoed back, e.g. 'TX'."
        },
        "state_name": {
          "type": "string",
          "description": "The full state name, e.g. 'Texas'."
        },
        "price_changes": {
          "type": "object",
          "properties": {
            "Diesel": {
              "type": "object",
              "properties": {
                "day_change": {
                  "type": "number",
                  "description": "Change over the last day, e.g. 0.018."
                },
                "week_change": {
                  "type": "number",
                  "description": "Change over the last week, e.g. 0.31."
                },
                "year_change": {
                  "type": "number",
                  "description": "Change over the last year, e.g. 2.769."
                },
                "month_change": {
                  "type": "number",
                  "description": "Change over the last month, e.g. 0.912."
                }
              },
              "additionalProperties": true
            },
            "Premium": {
              "type": "object",
              "properties": {
                "day_change": {
                  "type": "number",
                  "description": "Change over the last day, e.g. 0.02."
                },
                "week_change": {
                  "type": "number",
                  "description": "Change over the last week, e.g. 0.098."
                },
                "year_change": {
                  "type": "number",
                  "description": "Change over the last year, e.g. 1.212."
                },
                "month_change": {
                  "type": "number",
                  "description": "Change over the last month, e.g. 0.338."
                }
              },
              "additionalProperties": true
            },
            "Regular": {
              "type": "object",
              "properties": {
                "day_change": {
                  "type": "number",
                  "description": "Change over the last day, e.g. 0.018."
                },
                "week_change": {
                  "type": "number",
                  "description": "Change over the last week, e.g. 0.106."
                },
                "year_change": {
                  "type": "number",
                  "description": "Change over the last year, e.g. 1.171."
                },
                "month_change": {
                  "type": "number",
                  "description": "Change over the last month, e.g. 0.333."
                }
              },
              "additionalProperties": true
            },
            "Mid-Grade": {
              "type": "object",
              "properties": {
                "day_change": {
                  "type": "number",
                  "description": "Change over the last day, e.g. 0.019."
                },
                "week_change": {
                  "type": "number",
                  "description": "Change over the last week, e.g. 0.099."
                },
                "year_change": {
                  "type": "number",
                  "description": "Change over the last year, e.g. 1.193."
                },
                "month_change": {
                  "type": "number",
                  "description": "Change over the last month, e.g. 0.332."
                }
              },
              "additionalProperties": true
            }
          },
          "description": "One entry per fuel grade observed on the real fixture: 'Regular', 'Mid-Grade', 'Premium', 'Diesel'. Each carries the same four numeric change fields, in USD/gallon -- positive means prices rose over that window, negative means they fell.",
          "additionalProperties": true
        }
      },
      "description": "Present only when state_code matched a real US state; absent on the invalid-code fixture.",
      "additionalProperties": true
    },
    "status": {
      "type": "string",
      "description": "'success' on the real found-state fixture; absent on the invalid-code fixture."
    }
  },
  "description": "The price-change result at routing.responseResultPath ($.output). On an invalid two-letter state code the real fixture shows an entirely empty object -- no `status` or `data` field at all -- so no field here is required.",
  "additionalProperties": true
}

Pricing

Every real charge, itemised. A model that quietly omits one is a slow financial leak, so nothing here is rolled up, and a charge that only applies to some inputs says so rather than being added in.

Prices in this catalog are the provider's own list price, not your bill: Omnial MCP charges provider cost plus a platform markup on top, so what you are charged is higher than the figure shown. For the exact amount a specific call will cost, run omnial_execute with dry_run: true; that number includes the markup and is what we hold while the call runs. It is a quote, not a cap on the charge.

Charge	Rate
Per call Flat, regardless of what comes back	$0.0273

Cost basis: Not recorded
This tool's catalog entry does not record how its final bill is determined, so we will not tell you whether its cost is fixed before the call or reported by the provider afterwards. Either way what is held is a quote rather than a cap: you are charged what the call actually costs, bounded at 2x the quote.
Updated: Sep 23, 2026