Is this tokenized stock safe to buy, and am I overpaying? Pre-trade RWA check for an agent

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xDc9F94A8b93F070B58cfa580cbE740d763005FE6",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "30000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "4uLqY8BnJuA7CFxRork2FnNMu2u9NsJquF8Cc6V5B5jB",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "30000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {},
        "type": "http"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "properties": {
                "address": {
                  "description": "Token address instead of symbol (Solana mint or 0x EVM)",
                  "type": "string"
                },
                "since": {
                  "description": "Watch look-back window in minutes (default 120)",
                  "maximum": 10080,
                  "minimum": 5,
                  "type": "integer"
                },
                "symbol": {
                  "description": "Tokenized-stock ticker, e.g. AAPLx | AAPLon | TSLAr",
                  "type": "string"
                },
                "underlying": {
                  "description": "Real stock ticker (e.g. TSLA) — compare EVERY verified tokenized version across issuers instead of checking one token",
                  "type": "string"
                },
                "watch": {
                  "description": "Comma-separated token addresses (max 10) — return ONLY what CHANGED materially since `since` minutes ago. For monitors.",
                  "type": "string"
                }
              },
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

curl "https://stockwaves.net/api/xstock/health"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

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