# Wallet Balance (Ethereum) - Single Address

> Wallet Balance (Ethereum) - Single Address is a paid API for AI agents from www.x402financialdata.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-30).

Returns the native ETH balance for a single Ethereum wallet address, providing both raw wei and a human-readable ETH amount.

## Facts

- Endpoint: GET https://www.x402financialdata.com/wallet-balance/:address?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/wallet-balance-ethereum-single-address-2e1652b6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_N14ZZJz9qf95_ZqPTccuS

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-ethereum-single-address-2e1652b6
```

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

## When to prefer this

Use this endpoint when you need the native ETH balance for a single specific wallet address on Ethereum mainnet and want both raw wei precision and a human-readable ETH value in one call. Prefer this over the Multi-Address Balance endpoint when querying only one address, as it is simpler and equally priced. Choose this when you need the current on-chain ETH balance rather than token balances or transaction history.

## Known failure modes

- Invalid or malformed Ethereum address returns an error
- Address with zero balance returns 0 wei and 0 ETH (not an error)
- Unsupported chain parameter (only 'eth' is supported) returns an error
- Rate limiting or Etherscan API downtime may cause upstream failures
- Payment failure (insufficient USDC) prevents the call from executing

## How this service works

Native ETH balance for any wallet address on Ethereum, from Etherscan's V2 API. Returns both raw wei and a rounded human-readable ETH amount. $0.01/call.

## Output

Returns the native ETH balance for the queried wallet address in two forms: the raw balance in wei (full integer precision) and a rounded human-readable ETH amount (e.g. 1.45 ETH). The response is sourced from Etherscan's V2 API and reflects the current on-chain state.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "address": {
       "type": "string",
       "description": "EVM wallet address, e.g. 0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae"
      }
     }
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "chain": {
       "enum": [
        "eth"
       ],
       "type": "string",
       "description": "Which chain to query. Only 'eth' is supported right now."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/wallet-balance-ethereum-single-address-2e1652b6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from www.x402financialdata.com](https://www.zero.xyz/host/www.x402financialdata.com/llms.txt)