Evidence row 71488

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://bess-x402.onrender.com/v1/bess/arbitrage"
    ]
  ],
  "name": "BESS Arbitrage Calculator",
  "owner_address": "0x1129a6bb9c6165ff07fdc509c107b522ca0e1871",
  "raw": {
    "accepts": [
      {
        "amount": "500000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x1129A6BB9C6165FF07fdC509c107B522CA0e1871",
        "scheme": "exact"
      },
      {
        "amount": "500000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:137",
        "payTo": "0x1129A6BB9C6165FF07fdC509c107B522CA0e1871",
        "scheme": "exact"
      },
      {
        "amount": "500000",
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:42161",
        "payTo": "0x1129A6BB9C6165FF07fdC509c107B522CA0e1871",
        "scheme": "exact"
      }
    ],
    "description": "Battery storage (BESS) day-ahead arbitrage revenue for a European bidding zone: perfect-foresight LP per day on historical prices, annualised revenue per MW, cycles, payback. Use when sizing or screening a battery project, comparing zones, or answering how much a battery would have earned in a given year.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "end": "2025-12-31",
              "energy_mwh": 2,
              "power_mw": 1,
              "start": "2025-01-01",
              "zone": "DE-LU"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "annualised_revenue": 154000,
              "annualised_revenue_per_mw": 77000,
              "biddingZone": "DE-LU",
              "currencyUnit": "EUR / MWh",
              "dataSource": "Energy-Charts (Fraunhofer ISE), data from Bundesnetzagentur | SMARD.de, CC BY 4.0",
              "days": 365,
              "equivalent_full_cycles": 363
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET",
                    "HEAD",
                    "DELETE"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "capex_per_kwh": {
                      "description": "Optional capex per kWh for a simple payback estimate",
                      "type": "number"
                    },
                    "daily": {
                      "description": "Include the per-day breakdown, default false",
                      "type": "boolean"
                    },
                    "degradation_cost_per_mwh": {
                      "description": "Cost per MWh discharged, default 0",
                      "type": "number"
                    },
                    "end": {
                      "description": "Last day, YYYY-MM-DD, at most 366 days after start",
                      "format": "date",
                      "type": "string"
                    },
                    "energy_mwh": {
                      "description": "Battery energy capacity in MWh",
                      "type": "number"
                    },
                    "max_cycles_per_day": {
                      "description": "Default 1",
                      "type": "number"
                    },
                    "power_mw": {
                      "description": "Battery power rating in MW",
                      "type": "number"
                    },
                    "round_trip_efficiency": {
                      "description": "0-1, default 0.88",
                      "type": "number"
                    },
                    "start": {
                      "description": "First day, YYYY-MM-DD",
                      "format": "date",
                      "type": "string"
                    },
                    "zone": {
                      "description": "European bidding zone",
                      "enum": [
                        "AT",
                        "BE",
                        "CH",
                        "CZ",
                        "DE-LU",
                        "DK1",
                        "DK2",
                        "FR",
                        "HU",
                        "IT-North",
                        "NL",
                        "NO2",
                        "PL",
                        "SE4",
                        "SI"
                      ],
                      "type": "string"
                    }
                  },
                  "required": [
                    "zone",
                    "start",
                    "end"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-20T09:32:50.884Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-20T09:32:50.692Z"
    },
    "resource": "https://bess-x402.onrender.com/v1/bess/arbitrage",
    "serviceName": "BESS Arbitrage Calculator",
    "tags": [
      "energy",
      "battery",
      "electricity-prices",
      "europe"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Battery storage (BESS) day-ahead arbitrage revenue for a European bidding zone: perfect-foresight LP per day on historical prices, annualised revenue per MW, cycles, payback. Use when sizing or screening a battery project, comparing zones, or answering how much a battery would have earned in a given year."
}

What the leaf hashes

{"body":"e9fab3fa4bff763105ad34033e8d5667206db277c5777f8927cf5a0401ff20f0","id":71488,"kind":"listing","method":"baseline/1","observed_us":1793025482219994,"prev":null,"subject":"x402_bazaar:https://bess-x402.onrender.com/v1/bess/arbitrage","subject_kind":"source_record"}

Proof

Its day has not closed yet. A day closes ten minutes after midnight UTC; the proof appears here then.