Flexible-load agents buy this endpoint to schedule a contiguous operating window at the lo

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "duration_hours": 2
        },
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      },
      "output": {
        "example": {
          "action": "charge_during_window",
          "avg_price_ct_kwh": "5.475",
          "best_end": "2026-07-14T13:00:00.000Z",
          "best_start": "2026-07-14T11:00:00.000Z",
          "day_avg_ct_kwh": "12.397",
          "duration_hours": 2,
          "savings_vs_avg_pct": "55.8",
          "source": "Cheapest Window Optimizer",
          "timestamp": "2026-07-13T22:51:21.971Z",
          "window": [
            {
              "end": "2026-07-14T12:00:00.000Z",
              "price": 5.18,
              "start": "2026-07-14T11:00:00.000Z"
            },
            {
              "end": "2026-07-14T13:00:00.000Z",
              "price": 5.77,
              "start": "2026-07-14T12:00:00.000Z"
            }
          ]
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "body": {
              "additionalProperties": false,
              "properties": {
                "duration_hours": {
                  "default": 2,
                  "maximum": 24,
                  "minimum": 1,
                  "type": "integer"
                }
              },
              "type": "object"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            },
            "method": {
              "enum": [
                "POST",
                "PUT",
                "PATCH"
              ],
              "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"
    }
  }
}

curl "https://energy.halowerk.com/optimizer/cheapest-window"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://energy.halowerk.com/optimizer/cheapest-window");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

import httpx
res = httpx.get("https://energy.halowerk.com/optimizer/cheapest-window")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header