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mirrored listing x402 eip155:8453xrpl:0stellar:pubneteip155:1440000

ERC-20 token balance for any wallet — USDC, USDT, DAI, or any token contract — via balance

ERC-20 token balance for any wallet — USDC, USDT, DAI, or any token contract — via balanceOf eth_call, with decimals applied. Ethereum or Base mainnet. Pay 0.003 USDC.

Do you run app.heinrichstech.com? This listing was mirrored from Coinbase's public Bazaar. Claim it in 30 seconds — no account required — and it becomes verified, permanently overriding the mirrored copy.

Claim this listing
3000 (raw units)
price
2
calls / 30d
2
unique payers
2026-09-08
updated

Provider

app.heinrichstech.com · discovered, not yet claimed by its owner

Payment (x402 accepts[])

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xDa2F35d283c42dd60B965322394bc658a5c1769F",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "3000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "xrpl:0",
    "payTo": "rfryheo6yzFdLWj8qUQtZc7zG9MKkBkUEy",
    "asset": "XRP",
    "amount": "3000",
    "maxTimeoutSeconds": 600
  },
  {
    "scheme": "exact",
    "network": "xrpl:0",
    "payTo": "rfryheo6yzFdLWj8qUQtZc7zG9MKkBkUEy",
    "asset": "524C555344000000000000000000000000000000",
    "amount": "0.003000",
    "maxTimeoutSeconds": 600
  },
  {
    "scheme": "exact",
    "network": "xrpl:0",
    "payTo": "rfryheo6yzFdLWj8qUQtZc7zG9MKkBkUEy",
    "asset": "5553444300000000000000000000000000000000",
    "amount": "0.003000",
    "maxTimeoutSeconds": 600
  },
  {
    "scheme": "exact",
    "network": "stellar:pubnet",
    "payTo": "GCB5WZT5VCBBATGMQMTB6TLUXD6KQC6N5ITRWK3CCP4J3YOCE45FA2GO",
    "asset": "XLM",
    "amount": "3000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "stellar:pubnet",
    "payTo": "GCB5WZT5VCBBATGMQMTB6TLUXD6KQC6N5ITRWK3CCP4J3YOCE45FA2GO",
    "asset": "USDC",
    "amount": "3000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "onchain",
    "network": "eip155:8453",
    "payTo": "0xDa2F35d283c42dd60B965322394bc658a5c1769F",
    "asset": "0x88Fb150BDc53A65fe94Dea0c9BA0a6dAf8C6e196",
    "amount": "100000000000000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "onchain",
    "network": "eip155:1440000",
    "payTo": "0xDa2F35d283c42dd60B965322394bc658a5c1769F",
    "asset": "XRP",
    "amount": "400000000000000",
    "maxTimeoutSeconds": 300
  }
]

Output schema

{
  "bazaar": {
    "category": "data",
    "discoverable": true,
    "info": {
      "input": {
        "body": {
          "address": "0x… holder",
          "chain": "ethereum | base",
          "token": "0x… ERC-20 contract"
        },
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      },
      "output": {
        "example": {
          "chain": "base",
          "ok": true,
          "op": "erc20-balance"
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "body": {
              "properties": {
                "address": {
                  "description": "0x… holder",
                  "type": "string"
                },
                "chain": {
                  "description": "ethereum | base",
                  "type": "string"
                },
                "token": {
                  "description": "0x… ERC-20 contract",
                  "type": "string"
                }
              }
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            },
            "method": {
              "enum": [
                "POST",
                "PUT",
                "PATCH"
              ],
              "type": "string"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    },
    "tags": [
      "chain",
      "evm",
      "base",
      "ethereum",
      "erc20-balance"
    ]
  }
}

Use it

curl

curl "https://app.heinrichstech.com/v1/cdp/chain/erc20-balance"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://app.heinrichstech.com/v1/cdp/chain/erc20-balance");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://app.heinrichstech.com/v1/cdp/chain/erc20-balance")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Machine-readable

Everything on this page is also available as clean JSON at /resources/2814.json, and this resource appears in /discovery/resources and /discovery/search.