Live Base mainnet ETH and USDC balances for an address — treasury and agent wallet checks

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xc648116b5deBE4AF7D78838AA468d07e0A9Ab697",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "3000",
    "maxTimeoutSeconds": 120
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "pathParams": {},
        "queryParams": {
          "address": "0xc648116b5deBE4AF7D78838AA468d07e0A9Ab697"
        },
        "type": "http"
      },
      "output": {
        "example": {
          "chain": "base",
          "eth": "0.01",
          "ok": true,
          "service": "base-balance",
          "source": "base-mainnet-rpc",
          "usdc": "12.34"
        },
        "type": "json"
      }
    },
    "routeTemplate": "/api/v/base-balance",
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "pathParams": {
              "type": "object"
            },
            "queryParams": {
              "additionalProperties": false,
              "properties": {
                "address": {
                  "description": "0x EVM address on Base",
                  "type": "string"
                }
              },
              "required": [
                "address"
              ],
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "properties": {
                "chain": {
                  "type": "string"
                },
                "eth": {
                  "type": "string"
                },
                "ok": {
                  "type": "boolean"
                },
                "service": {
                  "type": "string"
                },
                "source": {
                  "type": "string"
                },
                "usdc": {
                  "type": "string"
                }
              },
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

curl "https://vendsdk.com/api/v/base-balance"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://vendsdk.com/api/v/base-balance");
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://vendsdk.com/api/v/base-balance")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header