Convert Gregorian dates to Hijri (Umm al-Qura calendar) and back

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x21353452E547B306a6007d834C433a118638D3b3",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {
          "date": "2026-08-03"
        },
        "type": "http"
      },
      "output": {
        "example": {
          "calendar": "Umm al-Qura",
          "gregorian": "2026-08-03",
          "hijri": {
            "date": "1448-02-19",
            "day": 19,
            "formattedAr": "19 صفر 1448هـ",
            "month": 2,
            "monthNameAr": "صفر",
            "monthNameEn": "Safar",
            "year": 1448
          },
          "weekdayEn": "Monday"
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "properties": {
                "date": {
                  "description": "Gregorian date YYYY-MM-DD to convert to Hijri (default: today)",
                  "type": "string"
                },
                "hijri": {
                  "description": "Hijri date iYYYY-iMM-iDD to convert to Gregorian (overrides 'date')",
                  "type": "string"
                }
              },
              "required": [],
              "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"
    }
  }
}

curl "https://bazaar-catalog.vercel.app/api/hijri"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://bazaar-catalog.vercel.app/api/hijri");
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://bazaar-catalog.vercel.app/api/hijri")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header