Airports within a radius of a coordinate, sorted by distance

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x2b6D4988Db4723E6908Db86Ab2b8dFBc51FC32C5",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "2500",
    "maxTimeoutSeconds": 60
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "TW6ntaGzvj63ZgPjszd4FCGmVTGfzv1MAYZbjYcyWhn",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "2500",
    "maxTimeoutSeconds": 60
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {
          "country": "example",
          "lat": -90,
          "limit": 20,
          "lon": -180,
          "radius_km": 200,
          "scheduled_service": false,
          "type": "large_airport"
        },
        "type": "http"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "properties": {
            "method": {
              "const": "GET"
            },
            "queryParams": {
              "additionalProperties": false,
              "properties": {
                "country": {
                  "description": "Filter by ISO 3166-1 alpha-2 country code (e.g. US).",
                  "type": "string"
                },
                "lat": {
                  "description": "Latitude in decimal degrees (-90 to 90).",
                  "maximum": 90,
                  "minimum": -90,
                  "type": "number"
                },
                "limit": {
                  "default": 20,
                  "description": "Max airports to return (1-100). Default 20.",
                  "maximum": 100,
                  "minimum": 1,
                  "type": "integer"
                },
                "lon": {
                  "description": "Longitude in decimal degrees (-180 to 180).",
                  "maximum": 180,
                  "minimum": -180,
                  "type": "number"
                },
                "radius_km": {
                  "default": 200,
                  "description": "Search radius in kilometers (1-2000). Default 200.",
                  "maximum": 2000,
                  "minimum": 1,
                  "type": "number"
                },
                "scheduled_service": {
                  "description": "When true, only commercial-service airports.",
                  "type": "boolean"
                },
                "type": {
                  "description": "Filter by airport type.",
                  "enum": [
                    "large_airport",
                    "medium_airport",
                    "small_airport",
                    "heliport",
                    "seaplane_base",
                    "balloonport",
                    "closed"
                  ],
                  "type": "string"
                }
              },
              "required": [
                "lat",
                "lon"
              ],
              "type": "object"
            },
            "type": {
              "const": "http"
            }
          },
          "required": [
            "type",
            "method",
            "queryParams"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

curl "https://2s.io/api/airport/near"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://2s.io/api/airport/near");
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://2s.io/api/airport/near")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header