Find the airports nearest to a latitude/longitude, ordered by great-circle distance

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "4000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "lat": 1,
          "limit": 1,
          "lon": 1,
          "radiusKm": 1
        },
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "body": {
              "additionalProperties": false,
              "properties": {
                "lat": {
                  "description": "Latitude in decimal degrees.",
                  "maximum": 90,
                  "minimum": -90,
                  "type": "number"
                },
                "limit": {
                  "description": "Maximum airports to return. Default 5.",
                  "maximum": 50,
                  "minimum": 1,
                  "type": "integer"
                },
                "lon": {
                  "description": "Longitude in decimal degrees.",
                  "maximum": 180,
                  "minimum": -180,
                  "type": "number"
                },
                "radiusKm": {
                  "description": "Search radius in km (default 500, max 20000).",
                  "type": "number"
                },
                "type": {
                  "description": "Optional airport-type filter.",
                  "enum": [
                    "large",
                    "medium",
                    "small",
                    "seaplane_base",
                    "heliport",
                    "balloonport",
                    "closed"
                  ],
                  "type": "string"
                }
              },
              "required": [
                "lat",
                "lon"
              ],
              "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"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

curl "https://airport.openverbs.com/v1/nearest"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://airport.openverbs.com/v1/nearest");
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://airport.openverbs.com/v1/nearest")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header