# Base ETH Balance Lookup

> Base ETH Balance Lookup is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-01).

Returns the native ETH balance of any wallet or contract address on the Base blockchain using live RPC data

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/crypto-base-eth-balance-blockchain-development?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/base-eth-balance-lookup-2d82bc0b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HzfdfOG0j25I6j-m6dliS

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 base-eth-balance-lookup-2d82bc0b -d '<json body>'
```

Example prompt: What's the current native ETH balance for the address 0x4200000000000000000000000000000000000006 on Base?

## When to prefer this

Choose this endpoint when you specifically need the native ETH balance of an address on the Base L2 network using live on-chain data. Prefer it over generic Ethereum balance APIs when you are building on Base or working with Base-deployed contracts. It is especially useful for DeFi applications, wallet dashboards, treasury management bots, or any agent workflow that needs real-time Base ETH holdings without setting up your own RPC infrastructure.

## Known failure modes

- Invalid or malformed Ethereum address returns an error
- Address with no activity may return zero balance (not an error)
- RPC node downtime or latency spikes may cause timeout or empty response
- Network congestion on Base may delay response
- Incorrect chain context (e.g. mainnet address queried expecting Base balance) yields unexpected results

## How this service works

Base ETH balance for WETH contract address: Address: WETH contract address. Read an address native ETH balance on Base. Focus: blockchain development. Uses live Coinbase Exchange or Base RPC data.

## Output

Returns the native ETH balance for the specified address on Base, drawn from live Coinbase Exchange or Base RPC data. The balance is expressed as a numeric value in ETH (or wei), reflecting the current on-chain state at the time of the query.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "address": {
   "type": "string",
   "default": "0x4200000000000000000000000000000000000006"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/base-eth-balance-lookup-2d82bc0b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)