The filtered ERC-8004 directory: which registered agents are actually alive, and which acc

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x6121654D3Fd4C8B42a90d30472E4D40927C3e6BB",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10001",
    "maxTimeoutSeconds": 60
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {
          "acceptsX402": "true",
          "quality": "valid_with_service"
        },
        "type": "http"
      },
      "output": {
        "example": {
          "agents": "array of {agentId, identifier, quality, acceptsX402, payoutWallet, checkedAt, owner, registeredAt}",
          "count": "agents on this page",
          "degraded": "true when the census cannot currently refresh classifications — the page may omit live agents and include stale ones",
          "nextCursor": "pass back as `cursor` for the next page; null when the registry is exhausted"
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "properties": {
                "acceptsX402": {
                  "description": "OPTIONAL. true to return only agents whose registration file declares x402.",
                  "type": "string"
                },
                "chain": {
                  "description": "OPTIONAL. Only \"base\" is served. Defaults to base.",
                  "type": "string"
                },
                "cursor": {
                  "description": "OPTIONAL. nextCursor from the previous page. Omit for the first page.",
                  "type": "string"
                },
                "quality": {
                  "description": "OPTIONAL. valid_with_service | valid_no_service | non_compliant | uri_unresolvable | no_uri.",
                  "type": "string"
                }
              },
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "properties": {
                "agents": {
                  "description": "array of {agentId, identifier, quality, acceptsX402, payoutWallet, checkedAt, owner, registeredAt}"
                },
                "count": {
                  "description": "agents on this page"
                },
                "degraded": {
                  "description": "true when the census cannot currently refresh classifications — the page may omit live agents and include stale ones"
                },
                "nextCursor": {
                  "description": "pass back as `cursor` for the next page; null when the registry is exhausted"
                }
              },
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

curl "https://trust-agent.io/v1/registry/agents"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://trust-agent.io/v1/registry/agents");
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://trust-agent.io/v1/registry/agents")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header