# Wallet Balance Lookup (Ethereum/EVM)

> Wallet Balance Lookup (Ethereum/EVM) is a paid API for AI agents from x402-stock-indicators.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-12).

Returns the current native ETH balance (and wei equivalent) for a given EVM wallet address, with chain and timestamp metadata.

## Facts

- Endpoint: GET https://x402-stock-indicators.vercel.app/wallet-balance/%7Baddress%7D
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/wallet-balance-lookup-ethereum-evm-579c1c53
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_f7OCeMrEhQpCpB8a5CuPI

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 wallet-balance-lookup-ethereum-evm-579c1c53
```

Example prompt: What's the current ETH balance of wallet address 0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae on Ethereum?

## When to prefer this

Use this endpoint when you need a quick, no-subscription, pay-per-call ETH/EVM wallet balance lookup without setting up API keys. Ideal for agents that need to spot-check a wallet balance on demand and pay $0.01 USDC per call via x402. Prefer this over a full node RPC call when you want a simple REST interface and don't want to manage Web3 infrastructure.

## Known failure modes

- Invalid or malformed wallet address returns an error
- Address with zero balance may return 0 but not an error
- Network timeouts on RPC calls may cause delayed or failed responses
- Non-EVM chain addresses (e.g. Solana) passed to this endpoint will likely fail
- Payment failure via x402 protocol will block the call

## How this service works

Pay-per-call stock, macro, on-chain, and crypto data over the x402 protocol. USDC on Base or Solana, no API keys, no subscriptions.

## Output

A JSON object containing the wallet's current native token balance as a decimal (e.g. 1.2845 ETH), the raw balance in wei, the chain identifier (e.g. 'eth'), the native symbol (ETH), and an as_of timestamp for when the balance was recorded.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "required": {
   "type": "string"
  },
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "as_of": "2026-07-31T03:43:30.000000",
  "chain": "eth",
  "address": "0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae",
  "balance": 1.28453901,
  "balance_wei": "1284539010000000000",
  "native_symbol": "ETH"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/wallet-balance-lookup-ethereum-evm-579c1c53/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-stock-indicators.vercel.app](https://www.zero.xyz/host/x402-stock-indicators.vercel.app/llms.txt)