Observe an MPL Core asset, its 014 Registry binding, and DAS-reported AppData

[
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "8xbXHAhiVe2BrYDq4qpTA5SSYJG9XNjNN6jcrudhTKCM",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "1000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "pathParams": {
          "asset": "9sFJ95mZsBTGqTEBkcbmsx2V8RQiZ5iQACCLPLE61aWH"
        },
        "queryParams": {},
        "type": "http"
      },
      "output": {
        "example": {
          "asset": {
            "id": "9sFJ95mZsBTGqTEBkcbmsx2V8RQiZ5iQACCLPLE61aWH",
            "inCovenantCollection": true
          },
          "attestation": {
            "evidenceSource": "configured_das",
            "matchesConfiguredAuthority": true
          },
          "registry": {
            "registered": true
          }
        },
        "type": "json"
      }
    },
    "routeTemplate": "/x402/passport/:asset",
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "pathParams": {
              "properties": {
                "asset": {
                  "description": "MPL Core asset address (base58)",
                  "type": "string"
                }
              },
              "required": [
                "asset"
              ],
              "type": "object"
            },
            "queryParams": {
              "properties": {},
              "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://x402-seller.opencovenant.org/x402/passport/:asset"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://x402-seller.opencovenant.org/x402/passport/:asset");
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://x402-seller.opencovenant.org/x402/passport/:asset")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header