# dt0ur.online Multi-Chain Wallet Balance Lookup

> dt0ur.online Multi-Chain Wallet Balance Lookup is a paid API for AI agents from dt0ur.online, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-03).

Returns native coin and ERC-20 token balances with live USD prices and total portfolio value for any wallet address across six EVM chains in a single call.

## Facts

- Endpoint: POST https://dt0ur.online/api/onchain/balance?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-03
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dt0ur-online-multi-chain-wallet-balance-lookup-23a590f0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-g068CYgZF2aJJPwerqC6

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability dt0ur-online-multi-chain-wallet-balance-lookup-23a590f0 -d '<json body>'
```

Example prompt: What's the current balance of wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Ethereum — show me the native ETH plus USDC, USDT, DAI, and WETH holdings with their live USD values and the total portfolio value.

## When to prefer this

Use this endpoint when you need a one-call multi-token portfolio snapshot for any EVM wallet, especially when you want native coin + ERC-20 balances with live USD pricing across Base, Ethereum, Arbitrum, Optimism, Polygon, or BSC. Prefer this over general blockchain explorers when you need structured, agent-consumable data with USD values already computed, and over custom RPC calls when you want aggregated results without managing multiple contract calls.

## Known failure modes

- Invalid or malformed wallet address returns an error
- Unsupported chain value returns validation error
- Requested ERC-20 contract address does not exist on the selected chain — balance returned as zero or error
- Network/RPC timeout for a specific chain may delay or fail the response
- Exceeding 25 token addresses in the tokens array returns a validation error
- Stale or unavailable price feed may cause USD values to be missing or approximate

## How this service works

Wallet balance lookup for any address on base, ethereum, arbitrum, optimism, polygon, bsc: native coin plus ERC-20 token balances (USDC, USDT, WETH, DAI, cbBTC or any tokens you pass) with live USD prices and total portfolio value, in one call.

## Output

Returns a breakdown of the wallet's native coin balance (e.g. ETH, MATIC, BNB), balances for each requested or default ERC-20 token (USDC, USDT, WETH, DAI, cbBTC, etc.) with live USD prices per token, and a computed total portfolio value in USD — all in a single response.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "chain": {
   "enum": [
    "base",
    "ethereum",
    "arbitrum",
    "optimism",
    "polygon",
    "bsc"
   ],
   "type": "string",
   "default": "base",
   "description": "EVM chain: base, ethereum, arbitrum, optimism, polygon, bsc (default base)"
  },
  "tokens": {
   "type": "array",
   "items": {
    "type": "string"
   },
   "maxItems": 25,
   "description": "ERC-20 contract addresses to check (default: well-known tokens on the chain)"
  },
  "address": {
   "type": "string",
   "description": "Wallet address (0x...)"
  },
  "include_zero": {
   "type": "boolean",
   "default": false,
   "description": "Include zero balances for default tokens"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/dt0ur-online-multi-chain-wallet-balance-lookup-23a590f0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from dt0ur.online](https://www.zero.xyz/host/dt0ur.online/llms.txt)