# Pocket Network Ethereum Native ETH Balance Lookup

> Pocket Network Ethereum Native ETH Balance Lookup is a paid API for AI agents from agent.pocket.network, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-03).

Returns the live native ETH balance of an Ethereum mainnet address via a pay-per-request RPC call, no account required.

## Facts

- Endpoint: POST https://agent.pocket.network/v1/wallet-portfolio?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-03
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/pocket-network-ethereum-native-eth-balance-lookup-2b0483dd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DsgvSfg2ZyumDVv1l5LDA

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 pocket-network-ethereum-native-eth-balance-lookup-2b0483dd -d '<json body>'
```

Example prompt: What's the current native ETH balance of the address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 on Ethereum mainnet?

## When to prefer this

Choose this endpoint when you need a fast, keyless, pay-per-request native ETH balance lookup on Ethereum mainnet (chain ID 1) without setting up an account or API key. It is ideal for agents that need occasional, ad-hoc wallet balance checks and want to pay micro-fees in USDC. Not suitable when ERC-20 token balances are needed, or when querying chains other than Ethereum mainnet.

## Known failure modes

- Invalid or malformed Ethereum address returns an error or empty data object
- Unsupported chain_id results in no data or an error response
- Network congestion or RPC node unavailability may cause timeouts
- Payment failure (insufficient USDC) results in HTTP 402 and no data returned
- Address with no ETH returns a zero balance, not an error

## How this service works

Pay-per-call access to Pocket Network services. No account, no API key.

## Output

Returns a JSON object with a `data` field containing the native ETH balance of the queried address, along with a `portal` metadata block indicating the service ID, provenance (third-party-supplier), and schema check status. Token (ERC-20) balances are not included.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "chains": {
   "description": "\"all\", or a list of chain ids or names (ethereum, base, bsc, arbitrum, monad, robinhood, polygon, avalanche, plasma, optimism, solana, hyperliquid). Default: Ethereum only."
  },
  "address": {
   "type": "string",
   "description": "EVM 0x address or ENS name."
  },
  "solana_address": {
   "type": "string",
   "description": "Solana base58 address."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {},
  "portal": {
   "serviceId": "wallet-portfolio",
   "provenance": "third-party-supplier",
   "schemaCheck": "passed"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/pocket-network-ethereum-native-eth-balance-lookup-2b0483dd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent.pocket.network](https://www.zero.xyz/host/agent.pocket.network/llms.txt)