# Financial Data x402 – Multi-Balance

> Financial Data x402 – Multi-Balance is a paid API for AI agents from x402financialdata.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Returns the native ETH balances (in ETH and wei) for up to 20 EVM addresses on the Ethereum chain, paid per-call via x402 with USDC.

## Facts

- Endpoint: GET https://x402financialdata.com/multi-balance
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/financial-data-x402-multi-balance-7c6403ed
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QERi-yvW5pigfBNJCdWp1

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 financial-data-x402-multi-balance-7c6403ed
```

Example prompt: What are the current ETH balances for these Ethereum addresses: 0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae and 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045?

## When to prefer this

Choose this endpoint when you need native ETH balances for one or many EVM addresses on Ethereum without managing API keys or subscriptions — ideal for agents that need pay-as-you-go on-chain balance lookups via the x402 micropayment protocol. It supports batching up to 20 addresses in a single call, making it efficient for portfolio or treasury monitoring tasks.

## Known failure modes

- Missing or empty 'addresses' query parameter returns a validation error
- More than 20 addresses supplied may result in an error or truncation
- Invalid or malformed EVM address format causes a rejection
- Unsupported chain value (anything other than 'eth') returns an error
- Payment failure or insufficient USDC balance causes x402 payment rejection, blocking the response

## 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

Returns a JSON object with a timestamp (as_of), the queried chain, the native symbol (ETH), and an array of balance entries — each containing the queried address, its ETH balance as a float, and its balance in wei as a string.

## 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"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "addresses"
     ],
     "properties": {
      "chain": {
       "enum": [
        "eth"
       ],
       "type": "string",
       "description": "Which chain to query. Only 'eth' is supported right now."
      },
      "addresses": {
       "type": "string",
       "description": "Comma-separated EVM addresses, up to 20."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "as_of": "2026-07-31T03:43:30.000000",
  "chain": "eth",
  "balances": [
   {
    "address": "0xde0b295669a9fd93d5f28d9ec85e40f4cb697bae",
    "balance": 7774.49179078,
    "balance_wei": "7774491790776062094342"
   }
  ],
  "native_symbol": "ETH"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/financial-data-x402-multi-balance-7c6403ed/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402financialdata.com](https://www.zero.xyz/host/x402financialdata.com/llms.txt)